Differential Diagnosis in Dermatopathology

Differential Diagnosis

Regression of lichen planus-like keratosis Regression of primary cutaneous melanoma 1. Signs of residual solar lentigo or reticulated seborrheic keratosis apparent in sections of tissue sometimes 1. No residual keratocytic neoplasm such as solar…

Differential Diagnosis in Dermatopathology

Pale-cell acanthoma vs. Psoriasis, plaque expression

Papules, nodules, and tumors that, on gross examination, are usually skin colored and, on histopathologic examination, consist of an epithelium-lined sac that contains fluid, cells, or both in the case of true cysts and of cysts that are associated…

Histologic Diagnosis of Inflammatory Skin Diseases

Fox-Fordyce disease

…ing of infundibula may be seen in inflammatory diseases as unalike as lichen planopilaris and discoid lupus erythematosus on one hand and noninflammatory conditions such as keratosis pilaris and phrynoderma on the other. The infiltrates of lymphocyte…

Histologic Diagnosis of Inflammatory Skin Diseases

See Classification of Pigmented Lesions

…artomas Collagenous nevus, papillary dermal type Nevoid hyperkeratosis of the nipple Benign neoplasms Solar lentigo, including lichen planus-like keratosis Seborrheic keratosis Malignant neoplasms Basal cell carcinoma, pigmented Solar keratosi…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Focus of Infection?

…se considered in some relation with neuropathy:            1, lichen planus; 2, lichen simplex (Vidal); 3, herpes simplex; 4, herpes zoster; 5, eczema (neurotic); 6, alopecia areata; 7, dermatitis herpetiformis; 8, scleroderma; 9, vitiligo. Group 3:…

Histologic Diagnosis of Inflammatory Skin Diseases

Hand-foot-and-mouth disease

…us membranes, e.g., erythema multiforme, fixed drug eruption, lichen planus, cicatricial pemphigoid, and pemphigus vulgaris. In the case of diseases such as erythema multiforme and fixed drug eruption, blisters in the skin may form within the epiderm…