Search Results for: muscles

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Follicular Degeneration Syndrome?

…icles; complete destruction eventually of follicles with replacement of them by “dense collagen”, and sparing of muscles of hair erection. On the basis of what has been written by LoPresti et al. and by Sperling, however, some…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…No very widely dilated, abnormal vascular structures 5. Smooth muscle in the wall of vein-like structures often 5. No smooth muscles in the wall of vessels 6. Abundant mucin in the wall of vein-like structures 6. No mucin in the wall of vessels 7….

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…Symmetrical 1. Asymmetrical 2. Limited to the dermis 2. Extends into subcutaneous fat and sometimes into fascia and skeletal muscles 3. “Cysts” always predominates 3. “Cysts” do not always predominate 4. “Cysts”…

Histologic Diagnosis of Inflammatory Skin Diseases

Alopecia areata, totalis, universalis

…in contrast to the cast of the collagen in whorls, which is red No lower segment (i.e., bulb and stem) of follicles apparent Muscles of hair erection intact Correlation clinicopathologic Because most of the follicles in a lesion of alopecia areata…

Histologic Diagnosis of Inflammatory Skin Diseases

Study By Disease

…ial benign chronic pemphigus) (Quiz #96) Hailey-Hailey disease with infection by herpesvirus (Quiz #664) Hamartoma of smooth muscles, hair follicles, and collagen bundles (Quiz #113) Hemangioma associated with prurigo nodularis (Quiz #413)…

Differential Diagnosis in Dermatopathology

Morphea, late stage vs. Collagenous nevus

Epidermal nevi are hamartomas in which the epidermis is abnormal, being hyperkeratotic, and in which lesions are aligned along Blaschko’s lines.

Differential Diagnosis in Dermatopathology

Trichoadenoma vs. Microcystic adnexal carcinoma

Epidermal nevi are hamartomas in which the epidermis is abnormal, being hyperkeratotic, and in which lesions are aligned along Blaschko’s lines.

Differential Diagnosis in Dermatopathology

Discussions

…ceous units may be absent or decreased noticeably in number. Eccrine glands and ducts, however, are preserved, as are smooth muscles of hair erection. Morphea is an inflammatory process, whereas a collagenous nevus is a hamartoma. A residuum of a…