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TINEA VERSICOLOR: HISTOLOGIC AND ULTRASTRUCTURAL INVESTIGATION OF PIGMENTARY CHANGES
Author(s) -
GALADARI IBRAHIM,
KOMY MEDHAT,
MOUSA AHMED,
HASHIMOTO KEN,
MEHREGAN AMIR H.
Publication year - 1992
Publication title -
international journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 93
eISSN - 1365-4632
pISSN - 0011-9059
DOI - 10.1111/j.1365-4362.1992.tb03565.x
Subject(s) - pityriasis , melanosome , ultrastructure , pathology , medicine , pigmentation disorder , tinea versicolor , hyperpigmentation , dermatology , keratin , population , melanin , biology , genetics , environmental health
A comparative histopathologic study is made between the hypopigmented and hyperpigmented skin lesions of pityriasis versicolor and normal skin areas utilizing histochemical stains and electron microscopy. There were no differences found between the population of Dopa‐positive melanocytes within the hypopigmented and hyperpigmented lesions and the normal skin areas. The total epidermal pigmentation was diminished in hypopigmented lesions. The keratin layer was found to be significantly thicker in hyperpigmented lesions and contained more organisms. In hypopigmented lesions, melanocytes contained fewer and smaller melanosomes and exhibited signs of degenerative cellular changes.