A Clinical Atlas of 101 Common Skin Diseases

Acne Vulgaris

A disease of infundibulosebaceous units, especially infundibula, that may manifest itself solely as noninflammatory lesions, i.e., comedones and intact cysts, or as inflammatory lesions, i.e., papules, nodules, and pustules. The process may resolve…

A Clinical Atlas of 101 Common Skin Diseases

Lichen Planus

An inflammatory process consisting usually of violaceous papules that have a polygonal outline and flat top, and that tends to favor flexural surfaces of skin and the buccal mucosa of the oral cavity. It sometimes affects follicles and nail units as…

A Clinical Atlas of 101 Common Skin Diseases


An inflammatory process, caused by the spirochete Treponema pallidum, that tends to evolve through three stages, namely, primary (typified usually by a solitary chancre), secondary (characterized by widespread macules and papules on skin and mucous…

A Clinical Atlas of 101 Common Skin Diseases


The end-stage of an inflammatory or neoplastic process in which there is loss of collagen and elastic tissue in the mid-reticular dermis with consequent formation of lesions that protrude in dome-like fashion above the skin surface and that can be h…

A Clinical Atlas of 101 Common Skin Diseases

Necrobiosis Lipoidica

A granulomatous inflammatory process characterized clinically by patches that become yellowish plaques and that in time resolve with atrophy and telangiectases. The condition usually occurs in persons with diabetes….

Resolving Quandaries in Dermatology, Pathology & Dermatopathology


…logically‚Ķ It appears dubious that a secondary form of macular atrophy occurs in the course of various diseases, such as syphilis, lupus erythematosus, tuberculosis, sarcoidosis, and leprosy. The macular atrophy then represents the atrophic stage of…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…ent intensive rubbing of the skin in lichen simplex chronicus. ATROPHY [Gk. a (without) + trophe (nourishment)]: Reduction in amount of tissue is a result of there being fewer cells and/or smaller cells and/or amount of extracellular substances. Atro…

Histologic Diagnosis of Inflammatory Skin Diseases

Errors and Reasons

…fibers contributes greatly to the appearance of some kinds of atrophy as that condition presents itself in the skin clinically, loss of collagen also is contributory; “superficial atrophy” results largely from loss of collagen in dermal…