paraganglioma, extra-adrenal (medicine) and Hydrocephalus (health)

paraganglioma, extra-adrenal (medicine)

paraganglioma, extra-adrenal

A relatively rare, usually benign neoplasm originating in the chemoreceptor tissue of the carotid body, glomus jugulare, and aortic bodies. It consists histologically of rounded or ovoid hyperchromatic cells that tend to be grouped in an alveolus-like pattern within a scant to moderate amount of fibrous stroma and a few large thin-walled vascular channels. They are uncommon before the age of 20, with a female predominance in some series.

Hydrocephalus (health)

A relatively rare condition caused by swelling of the fluid-filled cavities in the brain (called ventricles), hydrocephalus or "water on the brain" is sometimes the first sign of spina bifida or can be caused by a tumor or surgery to close an open spinal column.

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