Differential Diagnosis in Dermatopathology

Discussions

…rating one, but also consequent to rupture of an infundibular cyst. It evolves through stages of granulation tissue accompanied by countless extravasated erythrocytes, granulomatous inflammation, and fibrosis. At its zenith clinically, it is a papule…

Differential Diagnosis in Dermatopathology

Discussions

…times secondary to a ruptured infundibulum or an infundibular cyst. Therefore, the term dermatofibrosis describes the lesion more aptly, conveying as it does that the process is a type of fibrosing dermatitis, rather than a neoplasm of fibrocytes. Ma…

Differential Diagnosis in Dermatopathology

Discussions

…dular, morpheiform, fibroepithelial tumorous, and infundibulo-cystic. Trichoepitheliomas and nodular basal-cell carcinomas are epithelial neoplasms with the following changes histopathologic in common: Dome-shape Aggregates of neoplastic trichoblast…

Dermatology Practical & Conceptual

Yellow color upon dermatoscopy does not exclude melanoma!

…appearance, the differential diagnosis included an epidermal cyst or a sebaceous tumor. The dermatoscopic examination revealed mainly structureless yellow to pink areas and some dotted vessels. However, at the base and the periphery of the nodule, a…

Differential Diagnosis in Dermatopathology

Trichoepithelioma vs. Infundibulocystic basal-cell carcinoma

A hamartoma of epidermis, epithelial structures of adnexa, and presumably dermal elements, typified, when fully formed, by a papillated or verrucous yellowish plaque situated usually on the scalp. The condition may present itself as a solitary lesio…

Differential Diagnosis in Dermatopathology

Apocrine mixed tumor vs. Eccrine mixed tumor

A hamartoma of epidermis, epithelial structures of adnexa, and presumably dermal elements, typified, when fully formed, by a papillated or verrucous yellowish plaque situated usually on the scalp. The condition may present itself as a solitary lesio…

Histologic Diagnosis of Inflammatory Skin Diseases

Keloid

…e form of injury to the dermis, e.g., rupture of a follicular cyst, laceration, or piercing of an ear lobe. Comment Just as a distinction must be made between scarring in general and true scars, so, too, differences must be recognized between keloida…