This document provides an overview of gestational trophoblastic diseases (GTD). It discusses the classification, epidemiology, risk factors, histopathology, clinical presentation, and management of GTD. Key points include:
- GTD encompasses a spectrum of conditions ranging from benign lesions to malignant gestational trophoblastic neoplasms (GTN).
- Complete and partial hydatidiform moles are the most common forms of GTD and can develop into GTN like choriocarcinoma if not properly managed.
- The epidemiology, risk factors, and clinical presentation of GTD vary globally. Proper diagnosis involves histopathological examination and monitoring of beta-hCG levels
India is the highest TB burden country accounting for more than one-fourth of the global incidence .Genital TB is found in 5-10% of women with infertility problems, with low rates in Australia (1%) and high rates of up to 19% in India (ICMR,2011)
This presentation describes approach to a patient presenting with early pregnancy bleeding. It also includes a brief outline about the management of miscarriage, molar pregnancy and ectopic pregnancy.
India is the highest TB burden country accounting for more than one-fourth of the global incidence .Genital TB is found in 5-10% of women with infertility problems, with low rates in Australia (1%) and high rates of up to 19% in India (ICMR,2011)
This presentation describes approach to a patient presenting with early pregnancy bleeding. It also includes a brief outline about the management of miscarriage, molar pregnancy and ectopic pregnancy.
16-Aug-2021-"Gestational trophoblastic disease (GTD) is a spectrum of abnormal growth and proliferation of the trophoblasts of the placenta that continue even beyond the end of pregnancy of the placenta".
Gestational trophoblastic disease (GTD) is a term used for a group of pregnancy-related tumours. The cells that form gestational trophoblastic tumours are called trophoblasts and come from tissue that grows to form the placenta during pregnancy.
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There are a number of conditions that present acutely, predominantly with pain and/or swelling
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Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
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- ADVANCES IN CARDIOLOGY: A NEW PARADIGM IS COMING
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- WHAT’S NEW IN THE TREATMENT OF INFECTIOUS,
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Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
3. INTRODUCTION
Gestational trophoblastic diseases (GTD)
constitute a spectrum of tumours and tumour-
like conditions characterized by abnormal
proliferation of pregnancy associated
trophoblastic tissue of varying propensities for
invasion and spread 1
These diseases are characterized by a reliable
tumour marker - β-subunit of human chorionic
gonadotropin (β-hCG)
3
4. INTRODUCTION
Gestational trophoblastic neoplasia (GTN) refers
to the subset of gestational trophoblastic disease
that develops malignant sequelae. 2
These are evident by persistent elevation of beta
human chorionic gonadotrophin (βhCG) 3
4
5. INTRODUCTION
WHO classified GTD into the following 4
1. Molar pregnancies (Hydatidiform mole)
Complete hydatidiform mole
Partial mole
Invasive mole
2. Non-neoplastic lesions
Exaggerated placenta site
Placenta site nodule and plaque
5
7. EPIDEMIOLOGY
Variation in the incidence of GTD occurs globally
Prevalence is higher in Asia compared to
Europe 5. E.g
Japan = 2 per 1000 deliveries
Europe = 0.6 - 1.1 per 1000 deliveries
West Africa = 0.81 - 4.9 per 1000 deliveries
Nigerian studies
Port Harcourt = 2.3 per 1000 deliveries 5
ABUTH, Zaria = 7.2 per 1000 deliveries 6
7
9. PREDISPOSING FACTORS
Age: <20y (2fold) , > 40y(10 fold) & >50y (17%
V.mole)
Prior spontaneous miscarriage: doubles risk
Prior Molar Pregnancy- 1 episode (1%), 2
episodes (23%)
Diet: Vit. A deficiency, low carotene intake
(complete mole)
Contraception : COCP double the risk
Repetitive H. moles in women with different
partners
9
10. PREDISPOSING FACTORS
Partial moles have been linked to:
Higher educational levels
Smoking
Irregular menstrual cycles
Only male infants among the prior live births
10
12. AETIOPATHOGENESIS
Hydatidiform moles are abnormal pregnancies
characterized histologically by aberrant changes
within the placenta
The chorionic villi in these placenta show
varying degrees of trophoblastic proliferation
and oedema of the villous stroma
They are categorized into complete and partial
hydatidiform moles
12
16. HISTOPATHOLOGY OF
COMPLETE MOLES
Complete hydatidiform mole are abnormal
pregnancies characterized
Macroscopically by:
Clusters of vesicles with variable dimensions like
“bunch of grapes“
No foetal or embryonic tissue are produced
This mass of placental tissue completely fills the
endometrial cavity
16
17. HISTOPATHOLOGY OF
COMPLETE MOLES
Uterine enlargement in excess of gestational age
Theca-lutein cyst associated in 30%
Microscopically by
Enlarged, oedematous villi
Abnormal trophoblastic proliferation that diffusely
involve the entire villi
No foetal tissue, RBCs or amnion are produced
17
19. Normal term placenta showing smaller, non-edematous villi and
absence of trophoblastic proliferation
HISTOPATHOLOGY OF
COMPLETE MOLES
20. HISTOPATHOLOGY OF
COMPLETE MOLES
20
Complete moles characterized by diffuse placental villous oedema, which produces villous
enlargement and cistern formation in some villi
Villous
enlargement
Trophoblastic
proliferation
21. HISTOPATHOLGY OF PARTIAL
MOLE
Macroscopically:
The molar pattern does not involve the entire
placenta.
Uterine enlargement in excess of gestational age is
uncommon.
Theca-lutein cysts are rare
Foetal or embryonic tissue or amnion are present
Chorionic sac wall, amnion, umbilical cord and
embryonic/foetal tissue are common
21
22. HISTOPATHOLGY OF PARTIAL
MOLE
Microscopically partial moles are characterized
by:
Two populations of villi, one hydropic and one
"normal“
Minimal syncytiotrophoblast hyperplasia.
Enlarged cavitated villi.
Other villi with scalloped borders, often containing
trophoblastic inclusions.
Stromal blood vessels often contain nucleated foetal
red blood cells
22
25. HISTOPATHOLGY OF PARTIAL
MOLE
Features of complete versus partial moles
25
Feature Complete Mole Partial Mole
Karyotype 46,XX 46XY Triploid
(69XXX,XXY,XYY)
Villous edema All villi Some villi
Trophoblast proliferation Diffuse, circumferential Focal, slight
Atypia Often present Absent
Serum B hCG Elevated Less elevated
HCG in tissue ++++ +
Fetus/embryo/RBC Absent Present
Typical diagnosis Molar gestation Missed abortion
Post molar malignant
sequelae
15% 4-6%
26. CLINICAL PRESENTATION OF
MOLAR PREGNANCY
The classic features are:
Irregular vaginal bleeding
Anaemia
Hyperemesis
Excessive uterine enlargement
Early failed pregnancy.
Breathlessness (due to anaemia)
Abdominal pain
26
27. CLINICAL PRESENTATION OF
MOLAR PREGNANCY
Rarer presentations include:
Hyperthyroidism
Early onset pre-eclampsia
Abdominal distension due to theca lutein cysts
Very rarely
Acute respiratory failure
Neurological symptoms such as seizures (?metastatic
disease).
27
28. INVASIVE HYDATIDIFORM MOLE
(Chorioadenoma destruens)
This is a common manifestation of GTN
It is characterized by whole chorionic villi that
accompany excessive trophoblastic overgrowth and
invasion.
These tissues penetrate deep into the myometrium,
sometimes to involve the peritoneum, adjacent
parametrium, or vaginal vault.
The moles are locally invasive, but not metastatic
Originate almost exclusively from complete or
partial molar gestations 28
31. GESTATIONAL
CHORIOCARCINOMA
A malignant, trophoblastic tumour consisting of a
trimorphic proliferation of intermediate
trophoblastic cells, syncytiotrophoblast and
cytotrophoblast, in the absence of chorionic villi.4
It may occur subsequent to
a molar pregnancy (50% of instances),
an abortion (25%),
a normal gestation (22.5%)
An ectopic pregnancy (2.5%)
May occur de novo (germ cell tumour) 31
32. GESTATIONAL
CHORIOCARCINOMA
Macroscopically
The choriocarcinoma is classically a soft, fleshy,
yellow-white tumour with a marked tendency to
form large pale areas of ischemic necrosis, foci
of cystic softening, and extensive hemorrhage
32
33. GESTATIONAL
CHORIOCARCINOMA
Microscopically
Diffusely infiltrative or solid masses of cohesive sheets
of trimorphic malignant trophoblast consisting of
intermediate trophoblast and cytotrophoblast, rimmed
with syncytiotrophoblast
Presence of haemorrhage and necrosis
Presence of lymphovascular invasion
Cytological atypia (generally striking)
Numerous mitotic figures
No intrinsic stromal and vascular elements (makes it a
unique malignant solid tumour) 33
37. PLACENTAL SITE TROPHOBLASTIC
TUMOUR (PSTT)
A trophoblastic tumour consisting of neoplastic
implantation site-type intermediate trophoblast
It comprise less than 2% of gestational
trophoblastic neoplasms
May be preceded by a normal pregnancy (1/2),
spontaneous abortion (1/6), or hydatidiform mole
(1/5)
It tends to infiltrate only within the uterus,
disseminate late in their course and may follow
metastatic course like choriocarcinoma 37
38. HISTOPATHOLOGY OF PSTT
Macroscopically
PSTT generally involves the endomyometrium as
nodular, solid masses of 1–10 cm in size.
Deep myometrial invasion is seen in 50% of the
cases.
The cut surface of the tumour is usually solid and
fleshy with a white-tan to light yellow colour.
Focal haemorrhage and necrosis are present in nearly
half of the cases
38
39. HISTOPATHOLOGY OF PSTT
Microscopically, the tumour cells are
medium to large sized
mononuclear, multinucleated or convoluted nuclei with
hyperchromasia
mild to marked nuclear atypia,
prominent nucleoli,
eosinophilic to clear cytoplasm,
scattered mitoses
occasional intranuclear inclusions
39
40. 40
HISTOPATHOLOGY OF PSTT
PSTT – coronal section
showing neoplasm
diffusely infiltrating the
uterine wall, atypia and
numerous mitotic
figures
41. HISTOPATHOLOGY OF PSTT
Tumour cells have abundant eosinophilic cytoplasm and marked
cytological atypia with frequent large convoluted nuclei.
42. EPITHELIOID TROPHOBLASTIC
TUMOUR (ETT)
A trophoblastic tumour consisting of neoplastic
chorionic-type intermediate trophoblast
Usually occurs in women ranging in age from
15–48 years (mean of 36.1 years)
Vaginal bleeding or menometrorrhagia are the
most common symptoms
Antecedent gestations include term pregnancy
in 67%, spontaneous abortion in 16% and
hydatidiform mole in 16% of cases
42
43. HISTOPATHOLOGY OF ETT
Macroscopically
Discrete nodules or cystic haemorrhagic masses
deeply invading surrounding structures
Commonly in the cervix or lower uterine segment
The cut surface of the tumour is white-tan to brown,
with varying amounts of haemorrhage and necrosis
Ulceration and fistula formation are not uncommon
43
44. HISTOPATHOLOGY OF ETT
Microscopically
nodular growth of medium-sized tumour cells
arranged in nests or cords to large masses
moderate amount of finely granular, eosinophilic to
clear cytoplasm
distinct cell membranes
round nuclei with distinct small nucleoli.
moderate nuclear atypia
mitotic count ranges from 0–9 per 10 HPF
extensive necrosis
44
46. HISTOPATHOLOGY OF ETT
46Nest of tumour cells with a relatively uniform population of mononucleate
intermediate trophoblastic cells surrounded by necrotic debris.
48. EXAGGERATED PLACENTA
SITE
It represents part of the spectrum of normal
implantation-site change
It is associated with normal gestation or
hydatidiform mole and has no specific clinical
symptoms
It does not alter the overall endomyometrial
anatomy
48
49. EXAGGERATED PLACENTA
SITE
The lesion consists of an exuberant infiltration of
mononucleate implantation site intermediate
trophoblast, accompanied by multinucleate giant
cells.
49Numerous multinucleated intermediate trophoblastic
cells are present
50. PLACENTA SITE NODULE AND
PLAQUE
A benign, well circumscribed nodule or plaque
with abundant hyalinized stroma containing
chorionic-type intermediate trophoblast
Generally an incidental finding in endometrial or
endocervical curettings
Sometimes detected in a woman being
evaluated for abnormal cervical cytology
The lesion is nodular, ranging in size from 4–10
mm
50
51. PLACENTA SITE NODULE AND
PLAQUE
The clinical significance of these lesions is not
known as they have not been studied in detail
51
Well-circumscribed nodule with hyalinized centre surrounded by
chorionic-type intermediate trophoblastic cells.
52. ABNORMAL (NONMOLAR)
VILLOUS LESIONS
Various non-molar, villous lesions with
histological features simulating a partial
hydatidiform mole
Clinically presents as missed or incomplete
abortion
Entities include
hydropic abortions,
chromosomal trisomy syndromes,
digynic triploid conceptions,
placental mesenchymal dysplasia/ Beckwith-
Wiedemann syndrome
52
53. ABNORMAL (NONMOLAR)
VILLOUS LESIONS
Macroscopically: They vary from normal gross
findings to discernible vesicle formation
Microscopically:
Chorionic villi often display some degree of irregularity
in size and shape
focal, mild, trophoblastic hyperplasia (syncytio)
53
54. DIAGNOSTIC CRITERIA
Clinical history e.g.
amenorrhoea,
vaginal bleeding,
passage of vesicles,
hyperemesis
Examination
uterus large for date, doughy feel
Others
54
55. DIAGNOSTIC CRITERIA
Investigations
β hCG measurement
excess of that expected for the gestational age
criteria for the diagnosis of GTN
Ultrasonography (vaginal or abdominal)
diffuse swelling and enlargement of the chorionic villi
snow-storm appearance
absent / present fetal tissue
55
56. DIAGNOSTIC CRITERIA
Histopathology –as discussed above
Ploidy determination (cytometry) – determination of
complete set of chromosomes
Immunostaining - p57KIP2 (a nuclear protein) is
absent in complete moles
56
60. STAGING OF GTN
GTN is anatomically staged according to FIGO
adopted system
WHO modified prognostic scoring system is
used to further classify patients on risks of drug
failure
Those with WHO scores of 0 to 6 are considered
to have low-risk disease, score of 7 or higher are
assigned to the high-risk GTN group
60
61. STAGING OF GTN
Roman numeral corresponding to FIGO stage is
separated by a colon from the sum of all the
actual risk factor scores, for example, stage II:4
or stage IV:9
The addition of risk scoring to anatomic staging
has been shown to best reflect disease
behaviour 2
61
62. FIGO STAGING OF GTN
Stage Characteristics
I Disease confined to the uterus
II GTN extends outside the uterus but is
limited to the genital structures
(adnexa, vagina, broad ligament)
III GTN extends to the lungs, with or without
known genital tract involvement
IV All other metastasis
62
FIGO – International Federation of Gynaecology and Obstetrics
63. The common site
of metastases
are
Lung(80%)
vagina(30%)
pelvis(20%)
liver(10%)
brain(10%)
64. MODIFIED WHO PROGNOSTIC SCORING
SYSTEM (as adapted by FIGO)
64
Scores 0 1 2 4
Age (yr) <40 ≥40 - -
Antecedent pregnancy Mole Abortion Term -
Interval months from index
pregnancy
<4 4-6 7-12 >12
Pretreatment serum (B-hCG
(mIU/ml))
<103 103-<104 104-<105 ≥105
Largest tumour size (including
uterus)
<3cm 3-4cm ≥5cm -
Site of metastasis - Spleen,
Kidney
GI Liver,
brain
Number of metastasis - 1-4 5-8 >8
Previous failed chemotherapy
drugs
- - 1 ≥2
Low risk = score of 0-6 High risk = score of ≥7
65. MANAGEMENT OF MOLAR
PREGNANCY
There are 2 important basic lines
Evacuation of the mole (suction curettage)
Regular follow-up to detect persistent trophoblastic
disease
If both basic lines are done appropriately,
mortality rates can be reduced to zero.
Hysterectomy may be recommended if
patient wishes for surgical sterilization
patient is approaching menopause
65
66. MANAGEMENT OF MOLAR
PREGNANCY
there is excessive bleeding
some cases of invasive mole or PSTT
For partial mole, evacuation method depends on
size of foetal part
Small foetal part - suction curettage
Large foetal part – medical (oxytocic) – safe, risk of
embolism is very low, reduces need for chemotherapy
to 0.1-0.5%
66
67. SURGICAL EVACUATION
Prerequisites
Patient should be well evaluated and treated for
associated medical problems before surgery,
Blood should be made available (esp for large moles)
IV live should be established
Procedure to be done in the theatre under GA
67
68. SURGICAL EVACUATION
Cervix is dilated to admit a 10- to 12-mm plastic
suction curette
Suction commenced
I.V oxytocin infusion is started .
Gentle curettage is done after evacuation
The curette is gently rotated to ovoid perforation
of the soft uterus
Anti D Ig is given to Rh negative women (not
necessary in complete mole)
68
69. POST EVACUATION
SURVEILLANCE
After the uterus has been evacuated :
About 85% of cases ,the trophoblastic tissue die out
completely.
About 15% of cases the trophoblastic tissue does not
die out completely and may persist or recur as
invasive mole or choriocarcinoma.
This makes follow up important for early
recognition of persistent trophoblastic disease.
Also to know when pregnancy can be allowed
69
70. POST EVACUATION
SURVEILLANCE
Postmolar surveillance is done with serial
quantitative serum β-hCG levels
A baseline serum β -hCG level is obtained within
48 hours after evacuation.
Levels are monitored every 1 to 2 weeks until
they become undetectable (<5mIU/ml)
β –hCG is subsequently monitored monthly
70
71. OPTIMUM FOLLOW-UP AFTER
DIAGNOSIS OF GTD
6 months from the date of uterine evacuation
If hCG has reverted to normal within 56 days of the
pregnancy event 3
6 months from normalisation of the hCG level
If hCG has not reverted to normal within 56 days of
the pregnancy event 3
71
72. OPTIMUM FOLLOW-UP
AFTER DIAGNOSIS OF GTD
Effective contraception should be used during
the process of follow up
Condom used till hCG normalizes 3
COCP may be used afterwards 3
Avoid IUCD until hCG normalizes 3
72
73. INDICATION FOR CHEMOTHERAPY
Serum hCG >20000 i.u/L , at any time after
evacuation of mole
Raised hCG at 4 to 6 weeks after evacuation of
mole
Evidence of metastases, hepatic, brain and
pulmonary
Persistent uterine hemorrhage after evacuation
of mole with raised hCG levels.
73
80. CONCLUSION
Gestational trophoblastic diseases are a group of
tumours and tumour-like disorders of pregnancy
which when appropriately and diagnosed early
may lead to hundred percent cure rates even in
the metastatic variants. Therefore, healthcare
professionals should be well acquainted with their
diagnosis and proper management in order to
prevent undue maternal morbidity and mortality.
80
81. REFERENCES
1. Kwawukume EY, Emuveyan EE. Comprehensive Obstetrics in the
Tropics 1st edition. Assante & Hittscher Printing Press Ltd. 2002
2. Hoffman BL, Schorge JO, Bradshaw KD, Halvorson LM, Schaffer
JI, Corton MM. Williams gynecology. McGraw Hill Professional.
2016 Apr 22.
3. Royal College of Obstetricians and Gynaecologists. Management
of Gestational Trophoblastic Diseases. Green-top Guideline No. 38.
February 2010
4. Robert J, Kurman ML, Simon Herrington C, Young RH. WHO
classification of tumours of female reproductive organs. Lyon,
France: WHO. 2014:69-73.
5. Nyengidiki TK, Bassey G, Inimgba NM, Orazulike NC, Amadi C. A
five-year review of gestational trophoblastic diseases in Port
Harcourt, Nigeria. Port Harcourt Medical Journal. 2016;10(1):18-24.81
82. REFERENCES
6. Kolawole AO, Nwajagu JK, Oguntayo AO, Zayyan MS, Adewuyi S.
Gestational trophoblastic disease in ABUTH Zaria, Nigeria: A 5-year
review. Trop J Obstet Gynaecol. 2016;33:209-15.
7. Shahin H. Gestational trophoblastic diseases. Available at
www.slideshare.com . Accessed online 14th April 2018
8. Singh S. Gestational trophoblastic diseases . Available at
www.slideshare.com . Accessed online 14th April 2018
9. Kumar V, Abbas AK, Aster JC. Robbins Basic Pathology E-Book.
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82