Search Results for: dermatofibroma

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Pseudomalignancies?

…-cell carcinoma. A simulator of superficial basal-cell carcinoma is follicular germs induced by fibrohistiocytic elements of dermatofibroma, and a mimic of squamous-cell carcinoma is the hyperplasia of adnexal epithelium associated often with…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Dermatofibroma with “monster” cells Malignant fibrous histiocytoma 1. Symmetric 1. Asymmetric 2. Vertical orientation sometimes 2. No vertical orientation 3. Vasculature prominent 3. Vasculature not prominent 4. Few, if any, mitotic…

Time to reconsider Spitzoid neoplasms?

Time to reconsider Spitzoid neoplasms?

…nvincing, because it is very difficult to explain why it does not generally fail in the diagnosis of basal cell carcinoma or dermatofibroma, and so frequently fails in Spitzoid neoplasms. A second possibility may be that, despite the numerous…

Histologic Diagnosis of Inflammatory Skin Diseases

Necrobiotic xanthogranuloma

…necrobiotic xanthogranuloma is not related to necrobiosis lipoidica, despite the similarities in nomenclature (any more than dermatofibroma is connected in any way to dermatofibrosarcoma protuberans or sclerema neonatorum to scleredema adultorum),…

Differential Diagnosis in Dermatopathology

Images

Dermatofibroma with “monster” cells Malignant fibrous histiocytoma…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Xanthomatous dermatofibroma Xanthomatous malignant fibrous histiocytoma 1. Lesion relatively well circumscribed 1. Lesion poorly circumscribed 2. No collarettes of epithelium 2. Collarettes of epithelium sometimes 3. Epidermis hyperpigmented…

Melanoma and satellite blue papule

Melanoma and satellite blue papule

…like seborrheic keratosis, including lichen planus-like keratosis, hemangioma, pigmented basal cell carcinoma, hemosiderotic dermatofibroma, Kaposi sarcoma and angiosarcoma. Finally, exogenous dermal blue pigmentation, such as ink tattoo, radiation…