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Eponyms - O

Author: Andrew J. Yee, M.D., Posted on Thursday, July 15 @ 00:00:00 IST by RxPG  

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Eponyms

OBTURATOR SIGN
pain upon internal rotation of the leg with the hip and knee flexed; seen in appendicitis, pelvic abscess

OCCAM'S RAZOR
described in 14th century, "plurality must not be posited without necessity," in other words, parsimony in diagnosis

OGILVIE'S SYNDROME
massive idiopathic non-obstructive dilatation of the colon

OLLIER'S DISEASE
syndrome of multiple enchondromas


OMENN'S SYNDROME
combined immunodeficiency with hypereosinophilia

ONDINE'S CURSE
faiulure of the automatic control of ventilation, named after mythological tale in which the suitor of Neptune's daughter was cursed to lose automatic control over all bodily functions; associated with mutation in ret proto-oncogene; associated with Hirschsprung's disease

ONUFROWICZ, NUCLEUS OF
parasympathetic neurons in the sacral spinal cord that innervate the sphincters of the bowel and bladder

OPPENHEIM'S SIGN
involuntary dorsiflexion of the toes when stroking the medial/anterior tibial surface superiorly to inferiorly, indicating upper motor neuron defect

OROYA FEVER
from Bartonella bacilliformis, sandfly vector Phlebotomus found in valleys of the Andes mountains, 600-2500 m, profound intravascular hemolytic anemia of a few weeks duration, associated with lesions called verruga peruana resembling Kaposi's sarcoma; aka Carriσn's disease

ORTNER'S SYNDROME
hoarseness from compression of left recurrent laryngeal nerve by a greatly dilated left atrium (e.g., in mitral stenosis), enlarged tracheobronchial lymph nodes and dilated pulmonary artery

ORTOLANI'S SIGN
in congenital hip dislocation, rotate hip with patient in supine position and hip abducted; a "clunk" or "click" represents congenitally dislocated hip

OSBORN WAVE
EKG with distinctive convex "hump" at J point associated with hypothermia and temperature around 32C

OSGOOD-SCHLATTER'S DISEASE
epiphysitis of tibial tubercle resulting from repeated powerful contractions of the quadriceps seen in adolescents with open physis

OSLER'S NODES
tender to painful, purplish, split pea-sized, subcutaneous nodules in the pulp of the fingers and/or toes and thenar and hypothenar eminences; transient, disappearing within several days (5% of patients); in acute bacterial endocarditis, associated with minute infective emboli; aspiration may reveal the causative organism; in subacute bacterial endocarditis, associated with immune complexes and small-vessel arteritis of skin

OSLER'S SIGN
palpable brachial or radial artery when cuff > systolic pressure

OSLER-WEBER-RENDU DISEASE
hereditary hemorrhagic telangiectasia, larger lesions can be a source of chronic blood loss, systemic emboli, hypoxemia, hepatic dysfunction, and a high-output cardiac failure; important risk factor for brain abscess, especially in affected patients with clubbing, cyanosis, and/or polycythemia; use aminocaproic acid (an antifibrinolytic agent)

OTA, NEVUS OF
pigmentation mostly involves the skin and mucous membranes innervated by the first and second branches of the trigeminal nerve

OUCHTERLONY REACTION
double diffusion with antigen and antibody stuff


Note: Eponyms Database Author: Andrew J. Yee, M.D. (website: eponyms.net)

You can also revise eponyms using eponyms revision tool available at Eponyms Crammer



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