71 - La Crosse encephalitis is transmitted by tree hole mosquito - Aedes trisereiatus and causes most common arboviral infection in children in N. America; hyponatremia and fever associated with worse outcome.
72 - Carney syndrome (or triad) is nonfamilial disorder the includes combination of three rare tumors: gastric leiomyosarcoma - pulmonary chondroma - extraadrenal paraganglioma but no cardiac manifestations; unrelated to Carney complex.
73 - Keutel syndrome is malformation syndrome characterized by multiple pulmonary stenoses - neural hearing loss - short terminal phalanges - and calcifications and/or ossification of the cartilage in ears - nose larynx - trachea - and ribs; due to mutation in gene encoding human matrix Gla protein.
74 - Watson-Schwartz reaction is screening test for porphobilinogen (elevated for example in acute intermittent porphyria); mixing 4-dimethylaminobenzaldehyde with urine and then extract with chloroform; porphobilinogen extracts into upper aqueous layer giving it a pink color and urobilinogen extracts into chloroform layer; 50% positive at urinary concentration 5x upper limit of normal and consistently positive 10-20x upper limit of normal.
75 - Stuart factor is factor X.
76 - Pulfrich phenomenon is misperception of trajectory of moving objects (an optical illusion that can be elicited in normal subjects) - can be associated with optic neuritis.
77 - May-Thurner syndrome is iliofemoral deep vein thrombosis from impaired venous return because of compression of the left common iliac vein by overlying right common iliac artery.
78 - Bergmann gliosis is in ethanol abuse - proliferation of astrocytes adjacent to lost Purkinje cells between depleted granular cell and molecular layer of cerebellum.
79 - Preiser disease is spontaneous - non-traumatic osteonecrosis of the scaphoid bone.
80 - Winter’s formula is gives expected pCO2 (respiratory compensation) in uncomplicated metabolic acidosis; expected CO2=[HCO3]*1.54 + 8.36.