Differential Diagnosis in Dermatopathology

Discussions

Alopecia areata and trichotillomania have several attributes histopathologic in common, namely, some follicles in catagen and often in telogen, long fibrous tracks behind shortened follicles and, in sections from some specimens, and hardly any periv…

Differential Diagnosis in Dermatopathology

Alopecia areata vs. Trichotillomania

An inflammatory process that is idiopathic and results in depigmentation of the skin consequent to loss of melanocytes from the epidermis, and in whitening of hair that follows loss of melanocytes from the bulb of follicles….

Histologic Diagnosis of Inflammatory Skin Diseases

Post-inflammatory pigmentary alteration

Post-inflammatory pigmentary alteration Synonyms Postinflammatory pigmentary change Presentation stereotypical Age and sex No preference for age or sex, more prominent in dark-skinned individuals Distribution of lesions Sites of a previous dermatiti…

Histologic Diagnosis of Inflammatory Skin Diseases

Tinea versicolor

Tinea versicolor Synonyms Pityriasis versicolor Dermatomycosis furfuracea Presentation stereotypical Age and sex Young adult men especially, but anyone can be affected Distribution of lesions Trunk particularly, but also the proximal aspect of the e…

Histologic Diagnosis of Inflammatory Skin Diseases

Study By Disease

“Blue nevus” (Jadassohn-Tièche) (Quiz #360) “Blue nevus” (Jadassohn-Tièche) (Quiz #525) “Blue nevus” (Masson’s blue neuronevus) (Quiz #359) “Collagenous” nevus, papillary dermal type* (Quiz #11…