This document discusses various tumors and lesions that can occur in the posterior fossa region of the brain. It provides CT and MRI images and descriptions of common tumors in this area, including medulloblastoma, ependymoma, choroid plexus papilloma, brain stem gliomas, gangliogliomas, pilocytic astrocytomas, hemangioblastomas, and metastases from other cancers. The document is intended as an imaging guide for physicians to identify and diagnose different infra-tentorial lesions and tumors based on scan findings.

1. Imaging of posterior fossa
(Infra-tentorial) tumour
By Dr/ ABD ALLAH NAZEER. MD.

10. POSTERIOR FOSSA INTRAVENTRICULAR TUMOURS.
1- Medulloblastoma.
2- Ependymoma
3- Choroid plexus papilloma.

14. CT and MRI of medulloblastoma.

15. CT and MRI of medulloblastoma

26. choroid plexus papilloma (CPP) at the 4th
and 3rd ventricles (Ct and MRI images

27. choroid plexus papilloma, MRI images

28. Brain Stem Lesions.
Glioma.
Ganglioganglioma.
Astrocytoma.

36. Mid brain glioma

41. Ganglioglioma of the Brainstem,
extending to the cerebellar vemis.

42. Ganglioglioma of the Brainstem,
extending to the cervical cord.

43. Brain stem cystic pilocytic astrocytoma.

44. Tectum and cerebellum.
Pilocystic astrocytoma.
Medulloblastoma.
Hemangioblastoma.
Tectal glioma.

46. Tectal plate Glioma.

48. Hemangioblastoma of the central nervous system is a benign
tumor (WHO grade I) that is typically cystic and can occur
throughout the central nervous system. It is a tumor composed
of hemangioblasts, a type of stem cell that normally give rise
to blood vessels or blood cells. Its name breaks down to Greek
roots as follows: Haema (blood), angeion (vessel), blastos
(embryonic), oma (tumor).
Locations
Predominant locations include the cerebellum and spinal cord.
Causes
Hemangioblastomas can occur "sporadically", or as a
component of the von Hippel-Lindau disease (VHL).

49. Hemangioblastoma of the left cerebellum.

51. Hemangioblastomas
in von Hippel-Lindau
Disease

52. Hemangioblasto
ma, extending
to the upper
cervical region

55. Juvenile pilocytic astrocytoma (JPA).

56. Pilocytic Cerebellar Astrocytoma

57. Pilocytic astrocytoma

64. Acoustic Neuroma MRI Findings.

72. Epidermoid

80. Vertebrobasilar Dolichoectasia.

85. petrous apex cholesterol granuloma
DWI

87. Metastasis from cancer breast.

88. Metastasis from bronchogenic carcinoma.

89. Metastasis from renal carcinoma.

90. Posterior
fossa
cerebellar
metastasis
in adult.

105. Thank You