| knuckle sign | <radiology> Seen in pulmonary embolism, abrupt tapering of an occluded vessel distally (12 Dec 1998) |
|---|---|
| Kocher's sign | <clinical sign> In Graves' disease, on upward gaze, the globe lags behind the movement of the upper eyelid. (05 Mar 2000) |
| Kreysig's sign | <clinical sign> In adherent pericardium, an indrawing of the intercostal spaces, synchronous with the cardiac systole. Synonym: Kreysig's sign. (05 Mar 2000) |
| Kussmaul's sign | <clinical sign> In constrictive pericarditis, a paradoxical increase in venous distention and pressure during inspiration; seen occasionally in effusive-constrictive pericarditis when tamponading pericardial fluid overlies a constricting epicarditis. Synonym: Kussmaul's symptom. (05 Mar 2000) |
| Fischer's sign | <clinical sign> An obsolete sign: in tuberculosis of the mediastinal or peri-bronchial glands, after bending the patient's head as far back as possible, auscultation over the manubrium sterni will sometimes reveal a continuous loud murmur caused by the pressure of the enlarged glands on the large mediastinal vessels. Synonym: Fischer's symptom. (05 Mar 2000) |
| fissure sign | In perfusion scintigraphy of the lungs, decreased uptake of radionuclide in the periphery of each lobe, making the fissures visible; caused by a variety of diseases and artifacts. (05 Mar 2000) |
| flag sign | <clinical sign> Bands of discoloration of hair (reddish, blonde, or gray, depending on original colour) resulting from fluctuations in nutrition characteristic of kwashiorkor and in diseases of protein depletion such as ulcerative colitis. (05 Mar 2000) |
| fleischner sign | <radiology> Wide gap between thickened patulous ileocaecal valve and narrowed ulcerated terminal ileum, inverted umbrella defect, associated with tuberculous involvement of the ileocaecum (12 Dec 1998) |
| lambda sign | <radiology> Small ascending aorta: same size as right and left coronary aa., hypoplastic left heart syndrome (12 Dec 1998) |
| Lancisi's sign | <clinical sign> A large systolic jugular venous wave caused by tricuspid regurgitation replacing the normal negative systolic trough ("x" descent). (05 Mar 2000) |
| Landolfi's sign | <clinical sign> In aortic insufficiency, systolic contraction and diastolic dilation of the pupil. (05 Mar 2000) |
| football sign | <radiology> Large pneumoperitoneum outlining entire abdominal cavity, falciform ligament = cross threads (12 Dec 1998) |
| Forchheimer's sign | <clinical sign> The presence, in German measles, of a reddish maculopapular eruption on the soft palate. (05 Mar 2000) |
| Lasegue's sign | <clinical sign> When patient is supine with hip flexed, dorsiflexion of the ankle causing pain or muscle spasm in the posterior thigh indicates lumbar root or sciatic nerve irritation. (05 Mar 2000) |
| Fothergill's sign | <clinical sign> In rectus sheath haematoma, the haematoma produces a mass that does not cross the midline and remains palpable when the rectus muscle is tense. (05 Mar 2000) |