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Histologic Diagnosis of Inflammatory Skin Diseases

Images

…dly ever are seen in Mucha-Habermann disease, i.e., pityriasis lichenoides acuta and chronica. 10.25.3A: Perivascular dermatitis, interface, lichenoid, and perifolliculitis, lymphocytic + 10.25.3B: Subepidermal space, thin epidermis with a…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Overlap Syndromes?

…hematosus and lichen planus, the lesions actually are those of lichenoid discoid lupus erythematosus; the lichenoid infiltrate of lymphocytes, the jagged hyperplasia of the epidermis, and the hyperkeratosis merely resemble findings in lichen planus….

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…of Mucha-Habermann disease, one that is designated pityriasis lichenoides chronica. The correlate clinical is scaly papules, unlike in pityriasis lichenoides acuta, in which the correlates clinical are purpuric papules and even vesicles. The situati…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…10.108.3A: Peri-infundibulitis, fibrosing + 10.108.3B: Lichenoid infiltrate of lymphocytes at the periphery of a zone of peri-infundibular fibroplasia, and wedge-shaped hypergranulosis in an infundibulum = Traction alopecia  The lichenoid inf…

Differential Diagnosis in Dermatopathology

Lichen planus vs. Lichen planus-like keratosis

A condition in which deposits of a fibrillary protein (amyloid) appear in the skin as macules, papules, and nodules consequent to the effects of local factors, or as patches (which may be purpuric), plaques, nodules, and tumors as a result of a syst…

Differential Diagnosis in Dermatopathology

Discussions

…stensibly, both are superficial perivascular dermatitides with lichenoid infiltrates made up mostly of lymphocytes that obscure the dermoepidermal junction where there are vacuolar alteration and necrotic keratocytes (interface dermatitis, lichenoid

Histologic Diagnosis of Inflammatory Skin Diseases

Persistent light reaction

Persistent light reaction Synonyms Actinic reticuloid, chronic actinic dermatitis, chronic photosensitive dermatitis, photosensitive eczema Presentation stereotypical Age and sex Men especially Distribution of lesions Sun-exposed sites, i.e., the fa…

Differential Diagnosis in Dermatopathology

Discussions

Lichen planus and lichenoid discoid lupus erythematosus have many findings histopathologic in common, among them hyperkeratosis of surface epidermis and plugs of cornified cells in infundibular epidermis; individual necrotic keratocytes; a lichenoid

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