Medulloblastoma- A primitive neuroectodermal tumors (PNETs) is the most common malignant brain tumor of childhood (WHO IV)
arising from the vermis in the inferior medullary velum.
It comprises up to 18% of all pediatric brain tumors.
WNT and Shh pathway plays major role in its pathogenesis.
c-erbB-2 (HER2/neu) oncogene expression has prognostic value. Norcantharidin, Vismodegib, Sonidegib are the future in medulloblastoma.
Brain metastasis is an advance diseases with poor overall prognosis management of which is full of controversies. This slide aims to make metastasis simplified.
Gliomas are the commonest tumor of brain arising from the supportive cells of the brain with diverse form and presentation the treatment of which is surgical and demands adjuvant therapy for most of circumstances.
Medulloblastoma- A primitive neuroectodermal tumors (PNETs) is the most common malignant brain tumor of childhood (WHO IV)
arising from the vermis in the inferior medullary velum.
It comprises up to 18% of all pediatric brain tumors.
WNT and Shh pathway plays major role in its pathogenesis.
c-erbB-2 (HER2/neu) oncogene expression has prognostic value. Norcantharidin, Vismodegib, Sonidegib are the future in medulloblastoma.
Brain metastasis is an advance diseases with poor overall prognosis management of which is full of controversies. This slide aims to make metastasis simplified.
Gliomas are the commonest tumor of brain arising from the supportive cells of the brain with diverse form and presentation the treatment of which is surgical and demands adjuvant therapy for most of circumstances.
Craniopharyngioma is thought to arise from ectodermally derived epithelial remnants of rathke’s pouch and there craniopharyngeal duct.
Neoplastic transformation of cells derived from tooth primordia give rise to adamantinomatous craniopharnygioma, whereas
such transformation in cells derived from buccal mucosa primodia give rise to papillary type
Sellar, Suprasellar and Pineal tumor final pk .pptDr pradeep Kumar
this is very good presentation slide for radiologist and radiology resident. our references is authentic and most are from osborn brain imaging 2nd edition. This deal with sellar, suprasellar and pineal tumor . This help alot. thanks
Pineal gland is essentially an extra axial midline structure lying at the roof of dienchephalon rostral to the quadrigeminal cistern surrounded by important neurovascular structure, occurring in the geometric center of brain with same depth of trajectory had made the surgery in this region a formidable challenge to neurosurgeons, however radical resection must be the goal in selected pathologies, if not pure germ cell tumor.
Identified in 1921 by James Ewing
2nd most common bone tumor in children
Ewing’s Sarcoma Family of tumors:
Ewing’s sarcoma (Bone –87%)
Extraosseous Ewing’s sarcoma (8%)
Peripheral PNET(5%)
Askin’s tumor
Craniopharyngioma is thought to arise from ectodermally derived epithelial remnants of rathke’s pouch and there craniopharyngeal duct.
Neoplastic transformation of cells derived from tooth primordia give rise to adamantinomatous craniopharnygioma, whereas
such transformation in cells derived from buccal mucosa primodia give rise to papillary type
Sellar, Suprasellar and Pineal tumor final pk .pptDr pradeep Kumar
this is very good presentation slide for radiologist and radiology resident. our references is authentic and most are from osborn brain imaging 2nd edition. This deal with sellar, suprasellar and pineal tumor . This help alot. thanks
Pineal gland is essentially an extra axial midline structure lying at the roof of dienchephalon rostral to the quadrigeminal cistern surrounded by important neurovascular structure, occurring in the geometric center of brain with same depth of trajectory had made the surgery in this region a formidable challenge to neurosurgeons, however radical resection must be the goal in selected pathologies, if not pure germ cell tumor.
Identified in 1921 by James Ewing
2nd most common bone tumor in children
Ewing’s Sarcoma Family of tumors:
Ewing’s sarcoma (Bone –87%)
Extraosseous Ewing’s sarcoma (8%)
Peripheral PNET(5%)
Askin’s tumor
Tumors of Neuroepithelial Tissue
OLIGODENDROGLIOMA
Most supratentorial ependymomas are in the brain parenchyma, not the ventricles
CT
Iso-/hyperdense lobulated mass
Hydrocephalus common
Ca++ (25%)
CECT shows intense enhancement
MR
Iso-/hypointense on T1
Iso-/hyperintense on T2/FLAIR
“Flow voids” common
May show “blooming” foci on T2*
Intense enhancement, no restriction
Occasionally demonstrates CSF dissemination (image entire neuraxis preoperatively!)
In this presentation we will dscuss the imp imaging features of Posterior fossa tumors in pediatric age group.
Medulloblastoma
Pilocytic Astrocytoma
Ependymoma
Brainstem Glioma
Schwanoma
Meningioma
Epidermoid Cyst
Arachnoid Cyst
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
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These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
New Drug Discovery and Development .....NEHA GUPTA
The "New Drug Discovery and Development" process involves the identification, design, testing, and manufacturing of novel pharmaceutical compounds with the aim of introducing new and improved treatments for various medical conditions. This comprehensive endeavor encompasses various stages, including target identification, preclinical studies, clinical trials, regulatory approval, and post-market surveillance. It involves multidisciplinary collaboration among scientists, researchers, clinicians, regulatory experts, and pharmaceutical companies to bring innovative therapies to market and address unmet medical needs.
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
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Tom Selleck Health: A Comprehensive Look at the Iconic Actor’s Wellness Journeygreendigital
Tom Selleck, an enduring figure in Hollywood. has captivated audiences for decades with his rugged charm, iconic moustache. and memorable roles in television and film. From his breakout role as Thomas Magnum in Magnum P.I. to his current portrayal of Frank Reagan in Blue Bloods. Selleck's career has spanned over 50 years. But beyond his professional achievements. fans have often been curious about Tom Selleck Health. especially as he has aged in the public eye.
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Introduction
Many have been interested in Tom Selleck health. not only because of his enduring presence on screen but also because of the challenges. and lifestyle choices he has faced and made over the years. This article delves into the various aspects of Tom Selleck health. exploring his fitness regimen, diet, mental health. and the challenges he has encountered as he ages. We'll look at how he maintains his well-being. the health issues he has faced, and his approach to ageing .
Early Life and Career
Childhood and Athletic Beginnings
Tom Selleck was born on January 29, 1945, in Detroit, Michigan, and grew up in Sherman Oaks, California. From an early age, he was involved in sports, particularly basketball. which played a significant role in his physical development. His athletic pursuits continued into college. where he attended the University of Southern California (USC) on a basketball scholarship. This early involvement in sports laid a strong foundation for his physical health and disciplined lifestyle.
Transition to Acting
Selleck's transition from an athlete to an actor came with its physical demands. His first significant role in "Magnum P.I." required him to perform various stunts and maintain a fit appearance. This role, which he played from 1980 to 1988. necessitated a rigorous fitness routine to meet the show's demands. setting the stage for his long-term commitment to health and wellness.
Fitness Regimen
Workout Routine
Tom Selleck health and fitness regimen has evolved. adapting to his changing roles and age. During his "Magnum, P.I." days. Selleck's workouts were intense and focused on building and maintaining muscle mass. His routine included weightlifting, cardiovascular exercises. and specific training for the stunts he performed on the show.
Selleck adjusted his fitness routine as he aged to suit his body's needs. Today, his workouts focus on maintaining flexibility, strength, and cardiovascular health. He incorporates low-impact exercises such as swimming, walking, and light weightlifting. This balanced approach helps him stay fit without putting undue strain on his joints and muscles.
Importance of Flexibility and Mobility
In recent years, Selleck has emphasized the importance of flexibility and mobility in his fitness regimen. Understanding the natural decline in muscle mass and joint flexibility with age. he includes stretching and yoga in his routine. These practices help prevent injuries, improve posture, and maintain mobilit
2. 2
• A tumour that arises from the ependymal
cells in the nervous system.
• The Ependyma is the epithelial lining of
the brain ventricles and the central canal
of the spinal cord.
• Involved in the production of the
CSF and has shown as a reservoir
for neuro-regeneration.
• The group of tumours referred to as
Gliomas
• Two predominant types: Spinal and
Brain Ependymoma
Definition
Source: https://www.cancer.gov/types/brain/patient/child-ependymoma-treatment-pdq (accessed 07/03/2017)
3. 3
Biology
• Described in 1924 by Bailey
• Classified into 4 groups by the WHO classification of tumours:
1. Myxopapillary ependyoma (Grade 1)
2. Subependymomas (Grade 1)
3. Ependymoma (Grade 2)
4. Anaplastic ependymoma (Grade 3)
• Ependymomas tend to grow relatively slowly and displace, rather than
invade adjacent brain or spinal cord tissue.
• Ependymomas rarely metastasize to sites outside of the central nervous
system. When ependymomas recur after treatment, they tend to grow back
locally (i.e. at or near the site of the original tumour), rather than spreading to
other sites.
Source: http://www.childhoodbraintumor.org/medical-information/brain-tumor-types-and-imaging/item/84-ependymomas
4. • Grade I – Myxopapillary
Ependymoma and Subependymoma
• Grade II – Ependymoma (Classic)
• Grade III – Anaplastic Ependymoma
(which is the more cancerous)
Source: http://www.cern-foundation.org/education/diagnosis/pathology
5. 5
• Intracranial ependymomas represent 6-9% of primary
CNS neoplasms and account for 30% of primary CNS
neoplasms in children younger than 3 years.
• The incidence of ependymoma is approximately equal in
males and females.
• Ependymomas generally present in young children with a
mean age of diagnosis of 4 years, yet 25-40% of patients
are younger than 2 years.
• Spinal ependymomas are most common in patients aged
15-40 years, most of which are of a myxopapillary subtype.
Epidemiology
6. 6
• Symptoms are dependant on the location of the
tumour, typically found in three major locations:
• The posterior fossa (below the tentorium, containing the
cerebellum and the brainstem),
• The supratentorium (above the tentorium containing the
cerebral hemispheres),
• The spinal cord In adults, >75% of ependymomas arise
within the spinal canal, but in children, about 90% arise
within the brain in the posterior fossa, in or around the
fourth ventricle and only 10% arise within the spinal cord.
Presentation/Symptoms
Source: https://radiopaedia.org/articles/ependymoma
7. 7
• (60%) are located in the posterior fossa (infratentorial), usually arising from the floor
of the fourth ventricle. This is especially true in children.
• The remainder (40%) are located supratentorially and up to half of these are
intraparenchymal.
• Posterior fossa ependymomas has the propensity to grow out of the -
Foramina of Luschka into the
Cerebellopontine angle into the
Foramen of Magendi hence the term plastic ependymoma.
From here it can spread into the spine.
• Ependymomas are typically heterogeneous masses with areas of necrosis, calcification,
cystic change and haemorrhage frequently seen.
General radiographic features
9. 9
X-ray
• Primarily of historical interest since the
onset of CT in 1974
• Was useful for detecting increased intra-
cranial pressure and intracranial
calcification.
10. 10
• Most intracranial neoplasms are visible on CT
• Tumours may be hypodense, isodense or hypotense
on a non-contrast CT depending on tumour histology
and location.
• Small tumours or isodense tumours may be missed
on non-contrast CT but highlight after contrast
administration
• CT is preferred for visualising tumour calcification or
haemorrhage.
CT
12. 12
MRI
• MRI is the diagnostic modality of choice in the workup and
follow-up observation of intracranial neoplasms, including
ependymoma.
• MRI exploits the use of increased water content of many
neoplasms. This water concentration shows up as increased
signal on T2 weighted images and decreased signal on T1
images
• MRI is used to monitor ongoing treatment and to search for
recurrence.
• Final diagnosis is achieved through biopsy with histopathologic
analysis.
13. 13
MRI findings
• On T1-weighted images, ependymomas appear to be heterogeneous and
hypointense or isointense to gray and white matter.
• On T2-weighted they may be isointense or hyperintense to gray and white matter.
• Calcifications appear as hyperintensities on T1-weighted images, appear as
hypointense regions on T2-weighted images, and demonstrate “blooming” on T2
gradient-recalled echo images.
• As many as 50% of ependymomas demonstrate signal heterogeneity, which may
indicate calcification, necrosis, methemoglobin, hemosiderin, or tumor vascularity.
• Cystic changes result in high signal intensity on T2-weighted MRIs variably
depending on cyst contents.
14. 14
• Signal heterogeneity is a feature useful in distinguishing
ependymoma from the more homogeneous medulloblastoma.
• Calcification and hemorrhagic foci are more typical of
ependymoma than medulloblastoma.
• Additionally, ependymomas are more apt to extend through the
foramina of Luschka and Magendie, hence the term “plastic
ependymoma.”
• Similarly, choroid plexus papilloma is more homogeneous than
ependymoma and lacks the typical irregular margins of
ependymoma.
MRI findings
15. 15
• The lobulated mass in this
proton density–weighted
sagittal image arises from the
fourth ventricle and extends
distally through the foramen
of Magendie.
• There is minimal lateral
ventricular hydrocephalus.
Pathologic analysis
demonstrated cellular
ependymoma.
16. 16
MRI Gadolinium
• Contrast (often gadolinium I/V) helps visualise small tumours that don't
cause much oedema.
• Enhancement with IV gadolinium is useful in differentiating tumour from
adjacent vasogenic oedema and normal brain parenchyma.
• Without intravenous contrast enhancement, T2-weighted images are more
reliable in differentiating tumour margins than are T1-weighted images.
17. 17
• Anaplastic ependymoma of the lateral ventricle in an 8-week-old girl with
lateral ventricular hydrocephalus.
• Gadolinium-enhanced coronal T1-weighted image demonstrates a large
anaplastic necrotic ependymoma of the left lateral ventricular roof with
severe mass effect and subfalcine herniation.
18. 18
Supratentorial Ependymoma
• A. noncontrast CT, B. T2-weighted, C.
FLAIR, and D-F postgadolinium T1-
weighted MRI.
• Unlike posterior fossa ependymomas,
most supratentorial ependymomas
(70%) are extraventricular in origin.
• Supratentorial ependymomas usually
demonstrate more heterogeneous T1
and T2 signal than their infratentorial
counterparts, due to a greater tendency
toward cyst formation, calcifications, and
hemorrhage.
Source: http://clinicalgate.com/posterior-fossa-tumors-in-the-pediatric-population-multidisciplinary-management/
19. 19
Supratentorial Ependymoma
• (A) MRI demonstrates canonical features of a right
sylvian fissure ependymoma on precontrast axial T1-
weighted.
• (B) T2-weighted,
• (C) Fluid-attenuated inversion recovery
• (D) Images and on postcontrast T1-weighted
• (E) Sagittal T1-weighted.
• (F) Right pterional craniotomy was performed, and a
gross total resection was achieved after a wide
opening of the sylvian fissure.
• G - I, Histologic analysis shows areas of perivascular
pseudo-rosettes (G) as well as representative areas of
clear cell (H) and tanycytic (I) features of the grade II
tumor.
Source: Youmans and Winn Neurological Surgery, 7th edition
20. 20
Posterior fossa Ependymoma
• A. Pre-contrast axial CT shows an
isodense midline cerebellar mass
with calcifications.
• B. On T2-weighted sagittal MRI,
there is a fourth ventricular mass
showing compression of the
surrounding cerebellum and brain
stem.
• C. Post-contrast axial MRI shows a
heterogeneously enhancing mass
extending through left foramen of
Luschka into the cerebello-pontine
angle.
• D. Post-contrast sagittal MRI
showing an ependymoma
extending through the foramen
magnum.
Source: http://clinicalgate.com/posterior-fossa-tumors-in-the-pediatric-population-multidisciplinary-management/
21. 21
Posterior Ependymoma
• A. and B. Postcontrast T1-weighted axial
• Demonstrates a midline posterior fossa ependymoma and filling the fourth
ventricle and foramen of Luschka and exiting the foramen of Magendie.
• C. Intraoperative photograph depicts the posterior fossa ependymoma (grade II)
with a classical grayish, smooth appearance.
• D. Postoperative postcontrast T1-weighted magnetic resonance image
demonstrating a gross total resection achieved via a midline suboccipital
craniotomy.
Source: Youmans and Winn Neurological Surgery, 7th edition
22. 22
Spinal Ependymoma
• A 21-year-old female
patient with lumbar pain
for over a month;
• A. preoperative T2-
weighted magnetic
resonance imaging (MRI)
and gadolinium-
enhanced T1-weighted
MRI
• B. Revealing a tumor in
the conus medullaris;
• C. Postoperative MRI
revealing complete tumor
excision
Source: http://www.cancerjournal.net/viewimage.asp?img=JCanResTher_2013_9_1_60_110371_f3.jpg
23. 23
Nuclear Medicine: SPECT
• SPECT (Single positron emission computed tomography)
• Gamma rays emitted during radionuclide decay that are detected by a gamma camera that
rotates about the patients head.
• The radionuclide must cross the blood-brain barrier.
• The radionuclides used are:
• 201 TI chloride
• 99m Tc MIBI
• 123 I alpha-methyl tyrosine
• 111 In octreotide
• Can be used in distinguishing between benign lesions, low-grade gliomas and high grade.
24. Radionuclide = 99 m TC
SPECT of normal brain 201 T1 SPECT
Diagnosed by SPECt as a
high grade glioma
and confirmed post-resection
25. 25
Nuclear Medicine: PET
• Similar to SPECT but the radioisotopes used decay to produce positrons
• These positrons quickly combine with adjacent electrons to produce two
gamma rays that travel in opposite directions. Detection of these gamma rays
allows the calculation of their exact point of origin,
• Can evaluate different brain process depending on the radioisotope selected.
• Radionuclides useful for PET analysis include:
• Flourodeoxyglucose
• C methionine
• F alpha-methyl tyrosine
26. 26
• CT lateral ventricle wall suggested
possible ependymoma (red arrow).
• FDG-PET one week later, there is a
markedly increased uptake in the
tumour extending outside the CT-
defined lesion.
• Additional uptake in the fourth
ventricle is indicative of spread into
the cerebrospinal fluid.
• This accounts for the frequent liquoral
spread of neoplastic cells and the multi-
focality of lesions at later phases of the
disease.
27. 27
Treatment
• Although total resection is optimal, it is only possible in approximately 30-
40% of cases because vital structures are frequently involved by the
tumour.
• Ependymomas arising above the tentorium, in the floor or roof of the fourth
ventricle, or in the spinal canal are most amenable to complete resection.
• Adjuvant treatment of histologically confirmed intracranial ependymoma
remains an actively debated topic.
• Currently, a reduced role exists for adjuvant therapy of spinal ependymoma
after complete surgical resection. For patients who have postoperative
residual tumor or early recurrence, radiation is considered on the basis of
the individual patient's medical condition and neurological status.
Source: http://emedicine.medscape.com/article/277621-treatment
28. 28
Prognosis
• 10-year overall survival rate for ependymoma can vary from 45-55%.
• The current 5-year survival rate for patients with intracranial
ependymomas is approximately 50%,
• When rates from children and adults are combined. Stratification based on
age reveals 5-year survival rates of 76% in adults and 14% in children.
Source: Youmans and Winn Neurological Surgery 7th edition
30. Patient data
• Female, 39 years old
• Complains about back pain for a half of year
• There was MRI performed
31. 23.03.2012
• Intradural and intramedullar lesion
approxiamtely 6 x 1 x 1 cm in size
• Inhomogenous, localized more
centrally of myelon
• In T2 the structure is mostly
hyperintenss and in T1 iso-
hypointenss.
• Lesion is not enhancing
convinsingly
Intradural and intramedullar tumor
in level of Th9-Th11, most probably
ependymoma
Sag T2 fr FSE
33. 22.04.2013.
• After spinal tumor evacuation and
following radiation therapy
• There is post-resection residual
structure in distal part of resection
area. The largest size is 2 cm,
also slightly inhomogenous and is
not enhancing convinciengly
Sag T2 fr FSE