| Albini's nodules | Minute fibrous nodule's on the margins of the mitral and tricuspid valves of the heart, sometimes present in the neonate and representing foetal tissue rests; described previously by Cruveilhier. Compare: nodule of semilunar valve. (05 Mar 2000) |
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| Albini, Giuseppe | <person> Italian physiologist, 1827-1911. See: Albini's nodules. (05 Mar 2000) |
| albinism | <dermatology> Condition in which no melanin (or other pigment) is present. (05 Feb 1998) |
| albinism, ocular | Albinism affecting the eye in which pigment of the hair and skin is normal or only slightly diluted. The classic type is x-linked (nettleship-falls), but an autosomal recessive form also exists. Ocular abnormalities may include reduced pigmentation of the iris, nystagmus, photophobia, strabismus, and decreased visual acuity. (12 Dec 1998) |
| albinism, oculocutaneous | Heterogeneous group of autosomal recessive disorders comprising at least four recognised types, all having in common varying degrees of hypopigmentation of the skin, hair, and eyes. The two most common are the tyrosinase-positive and tyrosinase-negative types. (12 Dec 1998) |