291 - Uhl’s anomaly is paper thin parietal myocardium - usually but not always limited to right ventricle - presents as heart failure in infancy or early childhood.
292 - Muir-Torre syndrome is patients with hereditary nonpolyposis colon cancer (HNPCC) who also develop benign or malignant sebaceous skin tumors (often basal cell or squamous cell).
293 - Gerhardt’s sign is in aortic regurgitation - pulsation of the spleen in the presence of splenomegaly; also Sailer’s sign.
294 - Volkmann contracture is sequelae of compartment syndrome where there is contraction of forearm flexors.
295 - Homer-Wright pseudorosettes is in neuroblastoma - tumor cells arranged about a central space filled with fibrillar extensions of the cells.
296 - Gilbert’s syndrome is with the exception of hemolytic anemias - most common cause of mild unconjugated hyperbilirubinemia from mild decrease glucoronyltransferase activity - responds to phenobarbital - affects up to 7% of population.
297 - Austrian triad is clinical triad of pneumococcal pneumonia - meningitis - and endocarditis (classically aortic valve endocarditis associated with aortic regurgitation); described by Robert Austrian.
298 - Chvostek’s sign is hypocalcemia - in latent tetany - tapping the facial nerve against the bone just anterior to the ear producing ipsilateral contraction of facial muscles.
299 - Eagle-Barrett syndrome is prune-belly syndrome with triad of abdominal muscle deficiency - urinary tract abnormalities - and cryptorchidism.
300 - Desçemet’s membrane is membrane that forms the deepest layer of the cornea and functions as thin basement membrane for endothelium; location where copper is deposited in Wilson’s disease Kayser-Fleischer rings.