Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Keratosis Lichenoides Chronica?

…nance of lymphocytes and histiocytes, one was reputed to be a perifolliculitis, and still others were purported to be spongiotic dermatitis. In summary, the findings histopathologic presented as being those of keratosis lichenoides chronica are not s…

Histologic Diagnosis of Inflammatory Skin Diseases

Lichen planus

…h also presents itself as a lichenoid peri-infundibulitis and perifolliculitis of lymphocytes and ends with alopecia that is permanent. As a rule, the bandlike infiltrate of lymphocytes in traction alopecia does not descend much below the isthmus of…

Differential Diagnosis in Dermatopathology

Acne vulgaris, erythematous papule vs. Rosacea, erythematous papule

A disease of infundibulosebaceous units, especially infundibula, that may manifest itself solely as noninflammatory lesions, i.e., comedones and intact cysts, or as inflammatory lesions, i.e., papules, nodules, and pustules. The process may resolve…

Histologic Diagnosis of Inflammatory Skin Diseases

Acne vulgaris

…adenitis suppurativa, and dissecting cellulitis of the scalp (perifolliculitis capitis abscedens et suffodiens) consists of large abscesses that take the form of nodules associated often with sinus tracts and fistulae, those draining to the surface o…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…matory disease; it exhibits lichenoid peri-infundibulitis and perifolliculitis “early” in its course; trichotillomania, by contrast, is not an inflammatory disease. 10.108.2A: Section of a biopsy specimen from a scalp + 10.108.2…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Pseudopelade?

…0;In October, 1888, we presented a review of folliculitis and perifolliculitis decalvans at the Soci?t? m?dicale des h?pitaux, and, at this moment, we have nothing to add; there are three principal clinical types related in some way to one another: f…

Differential Diagnosis in Dermatopathology

Discussions

…hen striatus often is associated with peri-infundibilitis and perifolliculitis, eccrine adenitis, and edema of the papillary dermis, three findings that are not present in lichen nitidus. The combination of spongiosis and lichenoid granulomatous infl…