Differential Diagnosis in Dermatopathology

Keloid vs. Hypertrophic scar

Papules, nodules, and tumors that, on gross examination, are usually skin colored and, on histopathologic examination, consist of an epithelium-lined sac that contains fluid, cells, or both in the case of true cysts and of cysts that are associated…

Differential Diagnosis in Dermatopathology

Discussions

…ndulations of rete ridges as in proliferations of melanocytes like simple lentigines, junctional nevi of Clark’s type especially, and malignant melanoma in situ; sclerotic collagen in the upper part of the dermis, as in the lichen sclerosus et…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema figuratum

…ema (Bressler), and palpable migratory and arciform erythema (Clark). Differential diagnosis clinical Erythema annulare centrifugum consists of ovoid as well as annular lesions that, at their periphery, display scales that assume the shape of tiny c…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema multiforme

…anywhere, and, in time, the entire surface of the skin looks like wet tissue paper before sloughing and creating erosions. The condition often proves fatal, even when persons suffering from it are managed as if they had experienced a widespread burn…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Xerosis, Asteatosis, Asteatotic Eczema, Eczema Craquelé, and Dry Skin?

…he skin often attributable to dry, cold air exposure.” Clark RAF, Hopkins TT. The other eczemas. In: Moschella SL, Hurley HJ, eds. Dermatology, 3rd ed. Philadelphia: WB Saunders, 1992: 472. “Xerosis—Abnormal dryness of the skin.&#…

Histologic Diagnosis of Inflammatory Skin Diseases

Acne vulgaris

…ich is met with in Favre-Racouchot syndrome. Parenthetically, nevus comedonicus is an entirely different phenomenon, being a malformation congenital of infundibula, some of which extend in bloated form into the subcutaneous fat. In short, acne vulgar…

Histologic Diagnosis of Inflammatory Skin Diseases

Degos’ disease (malignant atrophic papulosis)

…e systemic. In our view, the process of Degos’ disease, like that of lupus erythematosus in all manifestations of it, is systemic from the outset. It is impossible, however, to decide which patients who present themselves with skin lesions of D…

Histologic Diagnosis of Inflammatory Skin Diseases

Pancreatic panniculitis

…sogenannte Fett-Nekrose. Prager Med Wochenschr 1883; 8:285–6. Clark WH, et al. Dermatology in General Medicine. New York: McGraw-Hill, 1971:1477. de Graciansky P, Paraf A, Rautureau J, Texier J. Panniculite nodulaire aiguë febrile récidivante: au cou…