Histologic Diagnosis of Inflammatory Skin Diseases

Gas gangrene

Gas gangrene Synonyms Clostridial myonecrosis Presentation stereotypical Age and sex Usually adults of both sexes Distribution of lesions Localized to sites of deep wounds Individual lesions Dusky erythematous plaques and hemorrhagic bullae through…

Erythema in Rosacea

Erythema in Rosacea

Current treatment of erythema in rosacea This type has traditionally been treated with avoidance of flushing, photoprotection, and surgical strategies including electrosurgery or laser therapies to treat the erythema and telangiectasias.  Laser the…

Histologic Diagnosis of Inflammatory Skin Diseases

Nodular vasculitis

…tz M, Elsner P. Erythema induratum of Bazin and Poncet’s disease—successful treatment with antitubercular drugs. J Eur Acad Dermatol Venereol 2003;17(3):334-36. Montgomery H, O’Leary PA, Barker NW. Nodular vascular diseases of the legs: e…

Differential Diagnosis in Dermatopathology

Discussions

Nevus verrucosus and acanthosis nigricans are processes that affect the papillary dermis and the epidermis. Both conditions may display hyperkeratosis, epidermal hyperpigmentation, papillomatosis, melanophages, and an increased number of fibrocytes…

Differential Diagnosis in Dermatopathology

Discussions

…es acuta and pityriasis lichenoides chronica are not different diseases, but different names for changes morphologic of the same disease. Pityriasis lichenoides acuta and pityriasis lichenoides chronica have many findings histopathologic in common: m…

Histologic Diagnosis of Inflammatory Skin Diseases

Atheroemboli

Atheroemboli Presentation stereotypical Age and sex Elderly persons, especially those with atherosclerosis Distribution of lesions Localized to lower extremities Individual lesions Purpuric macules, including splinter hemorrhages, livedo reticularis…

Histologic Diagnosis of Inflammatory Skin Diseases

Disseminated intravascular coagulopathy

…boy SJ. Disseminated intravascular coagulation: a dermatologic disease. Int J Dermatol 1977;16:47–51. McKay DG. Disseminated Intravascular Coagulation: An Intermediary Mechanism of Disease. New York: Harper & Row, 1965. Ontachi Y, Asakura H, Funa…

Differential Diagnosis in Dermatopathology

Nevus verrucosus vs. Acanthosis nigricans

An inflammatory process that tends to involve mucous membranes, as well as skin, and of the latter the acra especially. The stereotypical presentation is lesions composed of concentric rings (“iris” and “target” type). The co…

Differential Diagnosis in Dermatopathology

Discussions

…fatal; morphea never is. Scleredema (known also as scleredema adultorum of Buschke) affects young adults. About 50 percent of patients present themselves to a physician at an age younger than 20 years. There is no predilection for sex. The changes a…