Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Chondrodermatitis Nodularis Helicis?

“At the dermatology meeting in Berlin, Jadassohn also indicated that changes in the cartilage can often be established clinically, especially the knobby sites on the helix that show a whitish transparence through a thinned epidermis. My expe…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.39.1A: Infundibulitis, spongiotic, and peri-infundibulitis + 10.39.1B: Predominance of lymphocytes in and around infundibula dilated by corneocytes = Fox-Fordyce disease Spongiosis in the wall of an infundibulum near the site wh…

Histologic Diagnosis of Inflammatory Skin Diseases

Pheohyphomycosis

Pheohyphomycosis Synonyms Phaeomycotic cyst Subcutaneous pheaohyphomycosis Presentation stereotypical Age and sex No predilection for age or sex, but more common in individuals who reside in the tropics; most of those persons not immunocompromised…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 11.14.1A: Perivascular dermatosis, psoriasiform lichenoid + 11.14.1B: Lymphocytes, sparse in both the dermis and epidermis, larger in the epidermis than in dermis, solitary in the basal layer in foci, and in association with scant…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.77.1A: Perivascular dermatitis, spongiotic + 10.77.1B: Neutrophils in widened spaces between spinous cells = Pemphigus vulgaris, urticarial  In most lesions of pemphigus vulgaris, acantholytic cells come into being in the absenc…

Dermatology Practical & Conceptual

From the Dermatologikum Hamburg: Quiz

…nd partly ulcerated epidermis (Figure 2G) covered by extensive scale crust housing numerous neutrophils (Figure 2S). Some neutrophils are scattered within the epidermis (Figures 2D and 2H). A diffuse infiltrate of neutrophils, lymphocytes, plasma cel…