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Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Reticular Erythematous Mucinosis?

…itis” and those in the subcutaneous fat as “lupus panniculitis.” Moreover, just as lupus arthritis, lupus carditis, lupus encephalitis, lupus lymphadenitis, lupus nephritis, and lupus serositis are evidences of a systemic disease, s…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…10.79.1A: Diffuse dermatitis, neutrophils predominant, and panniculitis, lobular + 10.79.1B: Brown fungi characterized by a thick wall = Phaeohyphomycosis ¬†This condition is a subcutaneous variant of chromomycosis. Fungi reside mostly in zones…

Histologic Diagnosis of Inflammatory Skin Diseases

Crohn’s disease

…ay appear concurrently, e.g., infundibulitis, vasculitis, and panniculitis. “Metastatic” Crohn’s disease is a misleading term meant to signify granulomatous dermatitis and panniculitis at sites remote from the ends of the gastrointe…

Differential Diagnosis in Dermatopathology

Discussions

…rmatitis, and when it involves the subcutaneous fat, of lupus panniculitis (lupus profundus)—the dermatitis and panniculitis of lupus erythematosus is analogous to lupus carditis, lupus nephritis, lupus encephalitis, lupus arthritis, lupus sero…

Differential Diagnosis in Dermatopathology

Discoid lupus erythematosus vs. Polymorphous light eruption

An inflammatory process that involves the acra, in particular fingers and toes, and sometimes the thighs with bluish red papules and nodules, which invariably is induced by cold. Chilblain is a synonym for pernio, which usually represents lupus eryt…

Histologic Diagnosis of Inflammatory Skin Diseases

"Folliculitis" (Infundibulitis)

…and galvanizes to become extensive suppurative dermatitis and panniculitis. Halogenodermas begin as suppurative infundibulitis. “Perforating folliculitis” is an exaggeration of a noninfectious suppurative infundibulitis and is manifested…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Discoid Lupus Erythematosus versus Systemic Lupus Erythematosus? II

…erythematosus-lichen planus overlap D. Chilblain LE E. Lupus panniculitis (LE profundus) 1. With discoid LE 2. With systemic LE II. Subacute cutaneous LE A. Papulosquamous B. Annular C. Syndromes commonly exhibiting similar morphology 1. Neonatal LE…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Churg-Strauss Granuloma and Allergic Granulomatosis?

…debated hotly (akin to that of Kyrle’s disease and the panniculitis ostensibly caused by a1 antitrypsin deficiency). If the essential character of allergic granulomatosis will remain forever speculation, as in reality is the case, the same is…

Differential Diagnosis in Dermatopathology

Atrophic lichen planus vs. Atrophic discoid lupus erythematosus

An inflammatory process that involves the acra, in particular fingers and toes, and sometimes the thighs with bluish red papules and nodules, which invariably is induced by cold. Chilblain is a synonym for pernio, which usually represents lupus eryt…

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