Differential Diagnosis in Dermatopathology

Xanthogranuloma vs. Reticulohistiocytic granuloma

A systemic inflammatory process involving venules by deposits of fibrin within their wall in conjunction with neutrophils and nuclear “dust” of neutrophils in the dermis and, at times, the subcutaneous fat. The clinical manifestations ar…

Differential Diagnosis in Dermatopathology

Granuloma annulare vs. Necrobiosis lipoidica

A systemic inflammatory process involving venules by deposits of fibrin within their wall in conjunction with neutrophils and nuclear “dust” of neutrophils in the dermis and, at times, the subcutaneous fat. The clinical manifestations ar…

Differential Diagnosis in Dermatopathology

Pyogenic granuloma, fully developed vs. Kaposi’s sarcoma, nodular

A systemic inflammatory process involving venules by deposits of fibrin within their wall in conjunction with neutrophils and nuclear “dust” of neutrophils in the dermis and, at times, the subcutaneous fat. The clinical manifestations ar…

Differential Diagnosis in Dermatopathology

Interstitial granuloma annulare vs. Interstitial mycosis fungoides

A systemic inflammatory process involving venules by deposits of fibrin within their wall in conjunction with neutrophils and nuclear “dust” of neutrophils in the dermis and, at times, the subcutaneous fat. The clinical manifestations ar…

Histologic Diagnosis of Inflammatory Skin Diseases

Silica granuloma

Silica granuloma Presentation stereotypical Age and sex No predilection Distribution of lesions On exposed sites usually Individual lesions Papules and nodules Course Protracted because the foreign body persists in the skin Findings histopathologic…

Histologic Diagnosis of Inflammatory Skin Diseases

Pyogenic granuloma

A systemic inflammatory process involving venules by deposits of fibrin within their wall in conjunction with neutrophils and nuclear “dust” of neutrophils in the dermis and, at times, the subcutaneous fat. The clinical manifestations ar…

Histologic Diagnosis of Inflammatory Skin Diseases

Granuloma annulare

A systemic inflammatory process involving venules by deposits of fibrin within their wall in conjunction with neutrophils and nuclear “dust” of neutrophils in the dermis and, at times, the subcutaneous fat. The clinical manifestations ar…

Histologic Diagnosis of Inflammatory Skin Diseases

Xanthogranuloma/Reticulohistiocytic granuloma

A systemic inflammatory process involving venules by deposits of fibrin within their wall in conjunction with neutrophils and nuclear “dust” of neutrophils in the dermis and, at times, the subcutaneous fat. The clinical manifestations ar…

A Clinical Atlas of 101 Common Skin Diseases

Folliculitis (Infundibulitis) and Pseudofolliculitis (Pseudoinfundibulitis)

Infundibulitis, usually a suppurative inflammatory process that involves infundibula, is either noninfectious, as in the case of pustules of acne vulgaris, or infectious, as in the case of pustules caused by Staphylococcus aureus. In contrast, pseud…