| pityriasis sicca | <dermatology> Dried skin that flakes free from the scalp. (27 Sep 1997) |
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| pityriasis versicolor | A common chronic, noninflammatory and usually symptomless disorder, characterised by the occurrence of multiple macular patches of all sizes and shapes, and varying in pigmentation from fawn-coloured to brown. It is seen most frequently in hot, humid, tropical regions, and is caused by pityrosporon orbiculare. (12 Dec 1998) |