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…

Histologic Diagnosis of Inflammatory Skin Diseases

Introduction

The understanding of diseases has been founded traditionally on the tripod of diagnosis (what is it?), etiology (what caused it?), and pathogenesis (how did it happen?). Current emphasis in medicine, however, is on the latter two legs of that stand,…

Histologic Diagnosis of Inflammatory Skin Diseases

Scar

Scar Synonyms Cicatrix Presentation stereotypical Age and sex Any age and both sexes Distribution of lesions Usually localized, but sometimes widespread Configuration of lesions Linear, as in a surgical wound Round, as a consequence of an ulcer ind…

Differential Diagnosis in Dermatopathology

Discussions

Atrophic lichen planus and atrophic discoid lupus erythematosus pose problems in differential diagnosis histopathologic because they have several findings in common, among them compact orthokeratosis, focal hypergranulosis, epidermis thinned and ass…

Differential Diagnosis in Dermatopathology

Atrophic lichen planus vs. Atrophic discoid lupus erythematosus

A disease of infundibulosebaceous units, especially infundibula, that may manifest itself solely as noninflammatory lesions, i.e., comedones and intact cysts, or as inflammatory lesions, i.e., papules, nodules, and pustules. The process may resolve…