Differential Diagnosis in Dermatopathology

Discussions

…s reaction replete with lymphoid follicles. Nodular lesions of scabies have denser and deeper infiltrates than conventional papules of scabies in which mites and their products, such as fecal nuggets, are housed in burrows in the cornified layer. Oth…

Differential Diagnosis in Dermatopathology

Urticarial reaction to an arthropod assault vs. Urtica

Papules, nodules, vesicles, and sometimes bullae that develop in response to “bites” of arthropods, among the most common offenders being mosquitoes, bedbugs, and mites of scabies….

Histologic Diagnosis of Inflammatory Skin Diseases

Nerves

Both somatic sensory and autonomic motor nerves are present in skin (Fig. 1.82). The somatic sensory system mediates sensations of pain, itch, temperature, light touch, discriminative touch, pressure, vibration, and proprioception. Nerves of the aut…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

Images 11.13.1A: Perivascular and interstitial dermatosis, infundibulocentric + 11.13.1B: Small lymphocytes, large abnormal lymphocytes, neutrophils and eosinophils = Lymphomatoid papulosis ¬†Episodically, as shown here, an infiltrate of l…

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

Atopic dermatitis

Atopic dermatitis Synonyms Neurodermatitis Atopic eczema Presentation stereotypical Age and sex All ages and both sexes; in infants, children, and young adults who are atopic and in whom the signs of rubbing and scratching tend to be distributed on…

Histologic Diagnosis of Inflammatory Skin Diseases

Dermatitis herpetiformis

Dermatitis herpetiformis Synonyms During-Brocq disease Duhring’s disease Presentation stereotypical Age and sex Begins usually in young adults, but may appear for the first time in children or in middle-aged persons; no predilection for eith…