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Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 10.93.1A: Panniculitis, lobular + 10.93.1B: Histiocytes with thin nuclei in palisaded arrangement around a huge deposit of fibrin = Rheumatoid nodule  Neutrophils and nuclear “dust” of neutrophils scattered in the zone…

Histologic Diagnosis of Inflammatory Skin Diseases

Farmyard pox

…wane and become dark Differential diagnosis clinical Pyogenic granuloma resembles farmyard pox, especially in the weeping stage of it, but pyogenic granuloma favors sites such as face, sole, and nail fold. Cowpox presents itself as widespread vesicu…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Discoid Lupus Erythematosus Versus Systemic Lupus Erythematosus?* I

*This subject was addressed in Resolving Quandaries I. Because the quandary was not resolved to our satisfaction there, it is revisited here. “Discoid lupus lesions can occur as the sole manifestation of lupus in the absence of systemic di…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Figurate Erythemas?

“Erythema in Patches and Figured Erythema—These consist of congestive spots, patches, or surfaces of irregular shape, discoidal or of variable configuration (erythema marginatum or annulare, etc.). Although sometimes infectious, this t…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Focus of Infection?

“. . . we are justified in arranging, provisionally at least, the dermatoses possibly due to focal infection in six groups, as follows: Group 1: Those considered in some relation with arthropathy:            1, erythema nodosum; 2, erythema…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…with lymphocytes, plasma cells, and neutrophils = Interstitial granulomatous dermatitis with arthritis The infiltrate in the section pictured is “bottom heavy,” a finding common in this condition, which is associated with both palisaded g…

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