Differential Diagnosis in Dermatopathology

Discussions

…e presents itself typically as a solitary pink-purple papule, nodule, or plaque on a face. Lesions multiple on a face especially or on any other site anatomic, and tending to be agminated were diagnosed a few decades ago as “pseudolymphoma&#822…

Dermatology Practical & Conceptual

Nodules on the right ear

…boy with a one-year history of asymptomatic, slowly enlarging nodules affecting his right ear was seen. The patient’s past medical history was unremarkable, he was not immunosuppressed, he was not taking any drugs, and he was employed as a rubb…

Dermatology Practical & Conceptual

Glomangiosarcoma in the shoulder of a 51-year-old man

…er his trunk and neck. A 1 cm pink, firm, rubbery, non-tender nodule was present on the back of left shoulder. There was no lymphadenopathy. A shave biopsy of the left shoulder lesion was performed. Histopathological findings Shave biopsy showed a ce…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

-oid?

…alisade, as is the case for granuloma annulare and rheumatoid nodule. “Histiocytes,” as the neoplastic cells of epithelial sarcoma are claimed to be, are nonepithelial and, therefore, referring to them as “epithelioid is, at the lea…

Differential Diagnosis in Dermatopathology

Trichoblastoma, small nodular type vs. Trichoblastoma, large nodular type

A condition of persons of any age, but particularly children with a genetic proclivity for allergic rhinitis and conjunctivitis, and allergic asthma. Intense pruritus induces patients to rub the skin intensely and to scratch furiously, the resultant…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Dermatofibroma?

…ickly becomes a red papule and sometimes even a red or purple nodule. In time the domed lesion becomes brown, and, in the course of years, it slowly but surely flattens into a macule that is hypopigmented in its center and hyperpigmented at its perip…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Cutaneous Horn?

…c designation for a projectile, conical, dense hyperkeratotic nodule that resembles the horn of an animal.” Schwartz RA, Stoll HL. Epithelial precancerous lesions. In: Fitzpatrick TB, Eisen AZ, Wolff K, et al., eds. Dermatology in General Medic…