Histologic Diagnosis of Inflammatory Skin Diseases

Cytomegalic inclusion disease

Cytomegalic inclusion disease Synonyms Cytomegalovirus infection Cytomegalia Presentation stereotypical Age and sex Newborns or adults who are immunocompromised Distribution of lesions Localized, as in lesions in the perianal region of male homosexu…

Differential Diagnosis in Dermatopathology

Images

Mycosis fungoides, papular/plaque stage Adult T-cell leukemia/lymphoma, papular stage…

Differential Diagnosis in Dermatopathology

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

An inflammatory disease caused by the yeast Candida albicans and manifested clinically as erythematous papules and pustules that may become confluent to form plaques in the case of the former and erosions in the case of the latter. The nail unit may…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema nodosum

Erythema nodosum Synonyms Erythema contusiforme Erythema contusiformis Dermatitis contusiformis Erythema nouesux Presentation stereotypical Age and sex Young adults, especially women Distribution of lesions Bilateral and symmetrical over the pretibi…

Histologic Diagnosis of Inflammatory Skin Diseases

Acquired epidermolysis bullosa

Acquired epidermolysis bullosa Presentation stereotypical Age and sex Adults of both sexes Distribution of lesions Predilection for skin above joints and at sites of trauma; oral lesions sometimes Individual lesions Vesicles, bullae, scars, and mili…

Differential Diagnosis in Dermatopathology

Photoallergic dermatitis vs. Phototoxic dermatitis

An inflammatory disease caused by the yeast Candida albicans and manifested clinically as erythematous papules and pustules that may become confluent to form plaques in the case of the former and erosions in the case of the latter. The nail unit may…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema figuratum

Erythema figuratum Synonyms Erythema figuratum perstans Figurate erythema Annular erythema Presentation stereotypical Age and sex Adults of both sexes, but women especially Distribution of lesions Localized or widespread, trunk and proximal extremit…

Differential Diagnosis in Dermatopathology

Discussions

Both pyogenic granuloma and Kaposi’s sarcoma consist of proliferations of endothelial cells, and both are hyperplasias. In most instances, papules and nodules of Kaposi’s sarcoma are differentiated easily by microscopy conventional from…