Understanding Descriptive Statistics

A highly malignant primary brain tumor commonly found in the cerebral hemisphere.

GFAP positive and often presents as a butterfly glioma on CT, crossing the corpus callosum.

"Pseudo-palisading" pleomorphic tumor cells with border central areas of necrosis, hemorrhage and/or microvascular proliferation.

A rare, slow-growing brain tumor often located in the frontal lobe.

"Fried egg" cells with round nuclei with clear cytoplasm and a "chicken-wire" capillary system.

A common brain tumor more frequently seen in females, located on the surface of the brain and spinal cord.

Spindle cells concentrically arranged in a whorled pattern with psammoma bodies (laminated calcifications).

A benign primary brain tumor that's the most common in children, usually in posterior fossa.

GFAP positive with bipolar neoplastic cells with hairlike projections and Rosenthal fibers.

The most common malignant primary brain tumor in children, typically found in the cerebellum.

Small blue cells surrounding central areas of neuropil forming Homer-Wright rosettes, with tumor cells being synaptophysin positive.

Compresses the 4th ventricle causing non-communicating hydrocephalus and is located in the 4th ventricle.

Perivascular pseudo-rosettes, basal ciliary bodies, and rod-shaped blepharoplasts found near the nucleus.

Most common childhood supratentorial tumors located in sellar or suprasellar region.

Derived from remnants of Rathke pouch (ectoderm), with cholesterol crystals found in motor oil like fluid within the tumor.

A benign tumor found in the cerebellopontine angle or internal acoustic meatus.

S100 positive with biphasic, dense and hypercellular spindle cells, altering with hypocellular, myxoid areas.

A tumor associated with Hippel-Lindau syndrome and found in the cerebellum.

Characterized by closely arranged, thin-walled capillaries with minimal intervening parenchyma.

Tumors causing mass effect on optic chiasm leading to bitemporal hemianopia with possible hypopituitarism in children or with abducens nerve palsy.

Compresses cerebral aqueduct leading to obstructive hydrocephalus and causes Parinaud syndrome with compression of dorsal midbrain.

Can produce erythropoietin, leading to polycythemia.

Can be nonfunctioning (silent) and cause bitemporal hemianopia pressing on optic chiasm, hypopituitarism, or hyperpituitarism.

Galactorrhea, amenorrhea, and osteoporosis (due to suppression of estrogen).

Infertility, gynecomastia, and decreased libido.

Resection or stereotactic radiosurgery.

Dopamine agonists(bromocriptine, cabergoline).

Resection or stereotactic radiosurgery.

Somatotrophs (Secrete GH), Corticotropes (Secrete ACTH), Lactotrophs (Secrete Prolactin), Thyrotrophs (Secrete TSH), Gonadotrophs (Secrete FSH and LH).

The tumor compresses the fourth ventricle leading to hydrocephalus.

Dopamine agonists (bromocriptine, cabergoline) or Transsphenoidal resection.

Homonymous hemianopsia.

Calcification.

Resection or stereotactic radiosurgery.

Damage to cranial nerves V, VI, VII, and VIII.

Parinaud Syndrome Triad