Histologic Diagnosis of Inflammatory Skin Diseases

Chondrodermatitis nodularis helicis

…e helix or anthelix Individual lesions Papule or nodule often crusted or keratotic, but sometimes smooth; an early papule usually is pink and smooth Differential diagnosis clinical Solar keratosis has a red base and/or adherent scale that, on remova…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…me from the face or chest, but because there are no mounds of scale-crust at lips of the infundibular ostium. A subtle “plug” of corneocytes is present in the infundibular canal. Clinically, the patient had Fox-Fordyce disease. 10.3…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…is fungoides, plaque  Elongated mounds of parakeratosis or of scale-crust are seen often in patches and plaques of indubitable mycosis fungoides, such as in the example depicted here. Identical changes in the cornified layer also are encountered in m…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Chondrodermatitis Nodularis Helicis?

…les, and they tend to become eroded, ulcerated, fissured, and crusted, also as a result of the external trauma. As might be expected, the constellation of papular and nodular lesions just enumerated shares similarities histopathologic. The denominato…

Histologic Diagnosis of Inflammatory Skin Diseases

Phaeohyphomycosis

…that, in time, is followed by fibrosis. Epidermal changes of scale-crust result from parakeratosis accompanied by plasma and neutrophils. Dematiaceous (black) fungi may be present as yeasts, hyphae, and pseudohyphae in abscesses. Differential diagno…

Dermatology Practical & Conceptual

Zosteriform cutaneous leishmaniasis diagnosed with the help of dermoscopy

…thematous nodules, with a central ulcer covered with a yellow crust, were evident on the upper right back (Figure 1A). An erythematous papule was evident as a satellite lesion. Three similar additional lesions were found on the right upper chest (Fig…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…s eosinophils are present in a thickened epidermis covered by scale-crust. At scanning magnification, aspects of pemphigus vulgaris are not apparent; higher magnification is required to detect them. 10.77.7A: Vesicular dermatitis, intraepiderma…