Category: C

An accumulation of an excess of ammonia in the body due to a congenital deficiency of enzymes, either carbamyl phosphate synthetase or ornithine transcarbamylase, essential to the metabolism of ammonia. Clinical signs of ammonia toxicity are present, including vomiting, lethargy, coma, and, eventually, death.  

A hymen with many small perforations.  

A rapidly growing hygroma of lymphatic origin. It is usually located in the neck but may be in the thorax.  

A term sometimes used as a synonym for public health.  

Hydrocephalus occurring in newborns, typically caused by birth defects such as spina bifida, aqueductal stenosis, or birth trauma with ventricular hemorrhage.  

Hydrocephalus that maintains normal communication between the fourth ventricle and subarachnoid space.  

A hydrocele present at birth, resulting from failure of closure of the vaginal process.  

A hydrocele usually seen in middle-aged men. It may result from filariasis.  

A hydrocele in the neck resulting from the accumulation of serous fluid in the persistent cervical duct or cleft.  

The fluid-like substance of the crystalline lens of the eye.