Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Necrobiosis?

…s prominent mucin in granuloma annulare, fibrin in rheumatoid nodule, and degenerated collagen in necrobiosis lipoidica.” Warschaw KE, Cotton JP. Glossary. In: Farmer ER, Hood AF, eds. Pathology of the Skin, 2nd ed. New York: McGraw-Hill, 2000…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Atopic Dermatitis?

…and for an extended period of time, the result is a papule or nodule referred to as “prurigo nodularis.” If that papule or nodule then is scratched fiercely, it becomes eroded or ulcerated, and a “picker’s nodule” is bro…

Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

…, and a combination of rubbing and scratching (picker’s nodule); the condition is not analogous to allergic rhinitis, allergic conjunctivitis, and allergic asthma, each of which comes into being without the participation actively of the person…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…biosis lipoidica, necrobiotic xanthogranuloma, and rheumatoid nodule. When histiocytes are dispersed between and among bundles of collagen, the pattern is designated interstitial, the exemplar of it being the interstitial manifestation of granuloma a…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Sclerotic Fibroma?

…ealthy individuals, or as solitary or multiple, discrete skin nodules in patients with Cowden syndrome. Oral SF has been reported in patients with Cowden syndrome; however we now report the first documented series of sporadic SF originating within th…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Perivascular Dermatitis

…nd scratching energetically is termed a “picker’s nodule” (Fig. 5.165 A&B). Scratching wildly may initiate a variety of changes in the skin, among those being signs of impetiginization in the form of clumps of bacteria in scale-…

Dermatology Practical & Conceptual

Study By Disease

…Quiz #499) Fibromas and tuberous sclerosis (Quiz #9) Fibrotic nodule of borreliosis (Quiz #516) Fibrous papule of the face (Quiz #728) Fixed drug eruption (Quiz #628) Focal mucinosis (Quiz #840) Follicle center lymphoma (Quiz #615) Follicle-center ly…

Histologic Diagnosis of Inflammatory Skin Diseases

Dermatofibroma

…l, targetoid Individual lesions A papule usually, a plaque or nodule uncommonly, and a tumor (giant dermatofibroma) rarely; tends to be reddish early, brown late; a papule or nodule early, a macule (sometimes depressed below the surface of the skin)…