Differential Diagnosis in Dermatopathology

Urticarial reaction to an arthropod assault vs. Urtica

…les may be centered in follicles (Majocchi’s granuloma). Lesions may occur on any anatomic site, but particularly on the scalp (tinea capitis), inguinal region (tinea cruris), hands (tinea manum), feet (tinea pedis), and nails (onychomycosis)….

Histologic Diagnosis of Inflammatory Skin Diseases

Acne vulgaris

…r dermatitis, as the name denotes, favors the skin around the mouth and around the eyes. Individual lesions are papules and pustules atop a red base; there are no comedones. The condition is but one of many manifestations of rosacea. 4. Eosinophilic…

Histologic Diagnosis of Inflammatory Skin Diseases


…ted in dermatitis herpetiformis and in linear IgA dermatosis, diseases that are unaccompanied by any sign of vasculitis. 10.58.18A: Vasculitis, small-vessel, neutrophilic + 10.58.18B: Abundant nuclear “dust” of neutrophils and f…

Dermatology Practical & Conceptual

Letter to the Editor

…topathologist in his report is irrelevant to me. On the other hand, if the melanoma has hemolymphatic invasion or neurotrophic differentiation, I would be more worried. Only a few histopathological features-whether it is in situ or not, if there is v…

Histologic Diagnosis of Inflammatory Skin Diseases

Silica granuloma

…ue, they causing rents unavoidable, no matter how skilled the hand. Laboratory confirmation Polarized light reveals particles of silica to be brilliant and doubly refractile. Spectrographic analysis demonstrates the presence of silicon dioxide. Cause…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology


…neoplasms accompanied by variable quantities of mucin on one hand and large deposits of mucin on the other. Mucin may be manufactured by either cells epithelial or nonepithelial. In epithelial (follicular) mucinosis, for example, it is mostly infund…

Dermatology Practical & Conceptual

Protecting the patient is our protection

…ss in dermatopathology practice. Although underestimated, the handling of large numbers of small, similar-looking bioptic specimens results very often in unpredictable mistakes. The latter risk is scarcely reported in the literature and has rarely be…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Sebaceous Epithelioma?

…n sebaceous adenoma with its more typical lobules, on the one hand, and cystic basal cell epithelioma in which there is only little differentiation toward sebaceous cells, on the other.” Lever WF. Benign tumors of cutaneous appendages. Arch De…