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…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Cutaneous Horn?

“Cutaneous horns may complicate solar keratoses, viral warts, seborrheic warts, squamous cell carcinomas, lichenoid keratoses, and basal cell carcinomas.” McKee PH. Tumors of the surface epithelium. In: Pathology of the Skin with Clinic…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Inverted Follicular Keratosis, Tricholemmoma, and Desmoplastic Tricholemmoma?

“For about the last 8 years my associates and I have been observing a lesion—a keratosis—which occurs mostly on the face: I should say about 90 percent on the face, the remainder on other parts of the body. These lesions are characterized cli…

Dermatology Practical & Conceptual

Dermoscopy of non-pigmented eccrine poromas: study of Mexican cases

Abstract Background: Eccrine poroma is a benign neoplasm that can mimick a malignant neoplasm dermoscopically. The characteristic vascular pattern of this tumor has not been established. Objective: To evaluate dermoscopic features of non-pigmented e…

Differential Diagnosis in Dermatopathology


Keratoacanthomatous verruca vulgaris Verrucous keratoacanthoma