35. Meningioma

Organ: Skull

Description:

On the inner surface of the skull is there a well-demarcated, rounded, firm, solitary mass that is attached to the dura.

Diagnosis: Meningioma

Risk factors:

Old age

Theory:

In most cases, meningiomas are benign and don’t infiltrate other tissues, causing problems because of compression of the brain. High-grade forms of meningioma (anaplastic meningioma) are very rare.