Histologic Diagnosis of Inflammatory Skin Diseases

Images

…er stage, sebaceous glands were more numerous and infundibular cysts were even more formidable. The cysts ruptured, suppuration and granulomatous inflammation ensued, and fibrosis, seen here, followed. In short, rhinophyma begins with formation of in…

Histologic Diagnosis of Inflammatory Skin Diseases

Foreign body reaction

…o matter how resolute. Corneocytes from ruptured infundibular cysts rival suture as the cause primary of foreign body granuloma in the skin (and subcutaneous fat). Cornified contents of epidermal (infundibular) cysts and of follicular (isthmic-catag…

Differential Diagnosis in Dermatopathology

Discussions

Trichoadenoma and microcystic adnexal carcinoma at times resemble each other sufficiently to pose a dilemma diagnostic, even though the former is a hamartoma and the latter an adenocarcinoma. Both may have several findings histopathologic in common:…

Differential Diagnosis in Dermatopathology

Acne vulgaris, erythematous papule vs. Rosacea, erythematous papule

A papular and pustular inflammatory process that is centered in follicles and is distributed mostly in the middle third of the face in both vertical and horizontal directions. Among the varied manifestations of rosacea are innumerable telangiectases…

Dermatology Practical & Conceptual

Pigmented tumor in the nostril

Abstract A 64-year-old man was noted to have a single pigmented lesion in the nostril of his nose. Clinical examination revealed a 5 mm nodular growth and brown lesion. With a presumed clinical diagnosis of malignant skin tumor, a biopsy was perform…

Histologic Diagnosis of Inflammatory Skin Diseases

Acne vulgaris

…have become bowed with formation thereby of tiny infundibular cysts. When infundibular cysts become larger, they tend to explode, releasing into the dermis the contents of them, to wit, cornified cells, sebaceous secretion, Staphylococcus epidermidi…

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

Identification of Basic Patterns: Subcutaneous Fat: Panniculitis

See Fig. 5.385 A-C. Figure 5.385 Patterns of panniculitis. A. Septal mostly. B. Lobular mostly. C. Septal and lobular “equally.” At scanning magnification, the normal subcutaneous fat is seen to be segregated by struts of fibrous tiss…

Histologic Diagnosis of Inflammatory Skin Diseases

Rosacea

Rosacea Synonyms Gutta rosea Presentation stereotypical Age and sex Young and middle-aged adults, usually Caucasian women Distribution of lesions Center of the face in vertical and horizontal directions, i.e., nose, forehead, cheeks, and chin Indivi…