Differential Diagnosis in Dermatopathology

Insect "bite" vs. Lymphomatoid papulosis

A distinctive type of CD 30 lymphoma characterized by the presence mostly of papules, some of them purpuric, that may ulcerate and heal with a scar, and by lesions that tend to come and go for years, eventually disappearing entirely or, on occasion,…

Histologic Diagnosis of Inflammatory Skin Diseases

Lymphocytoma cutis

…of findings is diagnostic of the type of CD30 lymphoma known as lymphomatoid papulosis. In the variant of lymphomatoid papulosis with a monomorphous infiltrate, many abnormal lymphocytes resemble cells of Hodgkins disease. Nodules and tumors o…

Differential Diagnosis in Dermatopathology

Ichthyosis vulgaris vs. X-linked ichthyosis

A distinctive type of CD 30 lymphoma characterized by the presence mostly of papules, some of them purpuric, that may ulcerate and heal with a scar, and by lesions that tend to come and go for years, eventually disappearing entirely or, on occasion,…

Differential Diagnosis in Dermatopathology

Discussions

s on the palms and soles that the volar surfaces of their hands and feet often resemble those of elderly persons. A type of ichthyosis emerges in adulthood as an acquired condition, apparently as a consequence of an underlying disease like Hodgkin&#8…

Differential Diagnosis in Dermatopathology

Discussions

…lve internal organs, especially lymph nodes, lungs, and the gastrointestinal tract in 10% or more of patients. Furthermore, patients with Kaposi’s sarcoma have a greater incidence of lymphoreticular disorders, such as Hodgkins disease an…

Differential Diagnosis in Dermatopathology

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

A distinctive type of CD 30 lymphoma characterized by the presence mostly of papules, some of them purpuric, that may ulcerate and heal with a scar, and by lesions that tend to come and go for years, eventually disappearing entirely or, on occasion,…