Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Tricho-, pilo-, folliculo- ?

…benign epithelial neoplasm of hair, but an intradermal type of trichoblastoma in which aggregations of follicular germinative cells have become organized in a pattern cribriform. Trichoepithelioma is a trichoblastoma because it is made up of follicul…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Pseudomalignancies?

“The term pseudocancerosis covers a variety of diseases that can be difficult to distinguish from true carcinomas not only clinically but also histologically. However, pseudocanceroses may not only be similar to squamous cell carcinomas but a…

Histologic Diagnosis of Inflammatory Skin Diseases

Macular and papular (lichenoid) amyloidosis-Cutaneous solely

Macular and papular (lichenoid) amyloidosis—Cutaneous solely Presentation stereotypical Age and sex Women of Asian, Latin, or Middle Eastern ancestry usually Distribution of lesions Macular form most common in the interscapular region, but also seen…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

Trichoblastoma, Small Nodular Type Trichoblastoma, Large Nodular Type 1. At scanning magnification, a low-domed papule or nodule 1. At scanning magnification, a high-domed papule or nodule 2. Small nodules predominate 2. Large nodules predomin…

Differential Diagnosis in Dermatopathology

Discussions

Trichoblastoma is the name generic for all benign neoplasms composed of trichoblasts and trichoblastic carcinoma is the term generic for all malignant neoplasms made up of trichoblasts. A synonym for trichoblastic carcinoma is basal-cell carcinoma….

Differential Diagnosis in Dermatopathology

Images

Trichoblastoma, Small Nodular Type Trichoblastoma, Large Nodular Type…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

ABSCESS [L. abscessus (a going away)]: Clinically, a circumscribed collection of pus and histopathologically a localized collection of neutrophils. An abscess may form in the epidermis, both surface and infundibular, eccrine ducts, dermis, and subcu…