collarette /col·lar·ette/ (kol″er-et´)
collarette [kol″er-et´]
1. a narrow rim of loosened keratin overhanging the periphery of a circumscribed skin lesion, attached to the normal surrounding skin.
2. an irregular jagged line dividing the anterior surface of the iris into two regions.
Collarette
Dermatology A rim of thickened epidermis in pyogenic granuloma, which is morphologically similar to the pincer-like surrounding epidermis of lichen nitidus and keratoacanthoma
Mycology A rim of cell wall material at the tip of a phialide, resulting from the tip’s rupture during the release of the first phialoconidium
Mycology A rim of cell wall material at the tip of a phialide, resulting from the tip’s rupture during the release of the first phialoconidium
collarette [kol″er-et´]
1. a narrow rim of loosened keratin overhanging the periphery of a circumscribed skin lesion, attached to the normal surrounding skin.
2. an irregular jagged line dividing the anterior surface of the iris into two regions, the pupillary zone and the ciliary zone.
From Dorland's, 2000.
Biett's collarette a type of papular syphilid in which the central papule is surrounded by a ring of scales.
collarette
collarette
Line separating the pupillary zone and the ciliary zone which can be seen on the anterior surface of the iris. In the normal iris it is an irregular circular line lying about 1.5 mm from the pupillary margin (Fig. C13). See minor arterial circle of the iris; crypts of Fuchs.
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Fig. C13 Coloboma of the iris
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