Search Results for: burn

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…a purple patch of an ecchymosis from extravasation of erythrocytes in the dermis, and a reddish patch of a blush or of a sunburn from erythrocytes congested within dilated blood vessels of the superficial plexus. PHLEGMON [Gk. phlegma (flame,…

A reticulated pigmented rash on the lower leg

A reticulated pigmented rash on the lower leg

…heating devices cause the appearance of lesions. The heat is in the range 45-470 C, which is usually insufficient to cause a burn. In rural areas of the world, the lesion is traditionally caused by sitting or cooking near an open fire. Laptops are…

Histologic Diagnosis of Inflammatory Skin Diseases

Erythema multiforme

…xtensive. Severe necrosis of the epidermis results in large sheets that peel off in the manner of lesions in a second-degree burn. It may be life threatening because of loss of fluids from skin unprotected by an epidermis. Lyell’s disease…

Histologic Diagnosis of Inflammatory Skin Diseases

Irritant contact dermatitis/Phototoxic dermatitis

…atitis is damaging rays of ultraviolet light in the range of 290 to 400 nm. Comment Irritant contact dermatitis is a type of burn and, that being so, the epidermis is marked by ballooned keratocytes that eventuate in vesiculation accompanied by…

Histologic Diagnosis of Inflammatory Skin Diseases

Images

…rt of the epidermis, and some ballooned keratocytes = Phototoxic dermatitis The changes pictured are just like those of a sunburn. The position of the necrotic keratocytes, i.e., mostly in the upper part of the epidermis indicates that the injury to…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Primary and Secondary Lesions?

…onsequent to injury external. For example, a slap can produce an erythematous patch, rubbing can elicit papules and plaques, burns of various kinds can result in vesicles and bullae; and nodules and tumors can be brought into being by injection of…

Histologic Diagnosis of Inflammatory Skin Diseases

Pernio

…ends to occur in winter and, particularly, in persons who engage in winter sports. The findings, i.e., purplish papules that burn, vesicles, and ulcerations on toes, fingers, ears, and nose, are more distinctive clinically than they are…