| MRT | magnetic resonance tomography; maximum relaxation time; median range score; median reaction time; me... |
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| MTT | malignant teratoma, trophoblastic; maximal treadmill test; meal tolerance test; mean transit time; m... |
| OCT | object classification test; optimal cutting temperature; oral contraceptive therapy; ornithine carba... |
| OT | objective test; oblique talus; occlusion time; occupational therapist, occupational therapy; ocular ... |
| PBT | Paul-Bunnell test; phenacetin breath test; piebald trait; profile-based therapy |
| Escherich's sign | <clinical sign> In hypoparathyroidism (latent tetany) tapping the skin at the angle of the mouth causes protrusion of the lips. (05 Mar 2000) |
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| Jackson's sign | <clinical sign> During quiet respiration the movement of the paralysed side of the chest may be greater than that of the opposite side, while in forced respiration the paralysed side moves less than the other. Origin: J. H. Jackson (05 Mar 2000) |
| Ewart's sign | <clinical sign> In large pericardial effusions, an area of dullness with bronchial breathing and bronchophony below the angle of the left scapula. Synonym: Pins' sign. (05 Mar 2000) |
| Ewing's sign | <clinical sign> Dullness on percussion to the inner side of the angle of the left scapula, denoting an accumulation of fluid in the pericardium behind the heart, tenderness at the upper inner angle of the orbit at the point of attachment of the pulley of the superior oblique muscle, denoting closure of the outlet of the frontal sinus. (05 Mar 2000) |
| Joffroy's sign | <clinical sign> Disorder of the arithmetical faculty (the person being unable to do simple sums in addition or multiplication) in the early stages of organic brain disease. (05 Mar 2000) |
| external malleolar sign | <clinical sign> When the external malleolar skin area is irritated, extension of the great toe occurs in cases of organic disease of the corticospinal reflex paths. Synonym: Chaddock reflex, external malleolar sign. (05 Mar 2000) |
| eyelash sign | <clinical sign> In a case of apparent unconsciousness due to functional disease, such as conversion hysteria, stroking the eyelashes will occasion movement of the lids, but no such reflex will occur in case of severe organic brain lesion such as apoplexy, fracture of the skull, or other traumatism. (05 Mar 2000) |
| Faget's sign | <clinical sign> A slow pulse with an elevated temperature, often seen in yellow fever. (05 Mar 2000) |
| Uhthoff's sign | A transient temperature-dependent numbness, weakness, or loss of vision. Conduction stops in any nerve if the temperature gets too high. In a damaged nerve, e.g., by demyelinization, this shutdown temperature is lowered, and may approach normal body temperature. Transient neurological dysfunction may then appear with a hot shower, exercise, or fever. Synonym: Uhthoff syndrome. (05 Mar 2000) |
| Keen's sign | <clinical sign> Increased width at the malleoli in Pott's fracture. (05 Mar 2000) |
| Kehr's sign | <clinical sign> Violent pain in the left shoulder in a case of rupture of the spleen. (05 Mar 2000) |
| fan sign | <clinical sign> The spreading apart of the toes in the complete Babinski's sign. (05 Mar 2000) |
| Kernig's sign | <clinical sign> A physical examination finding that can indicate inflammation of the meninges (meningitis), with the subject lying flat on the back, the thigh is flexed (at right angle to the trunk), at this point complete extension at the knee joint is impossible, due to pain. (13 Nov 1997) |
| Kestenbaum's sign | <clinical sign> A decrease in the number of arterioles crossing optic disk margins as a sign of optic neuritis. (05 Mar 2000) |
| knuckle sign | <radiology> Seen in pulmonary embolism, abrupt tapering of an occluded vessel distally (12 Dec 1998) |