A Clinical Atlas of 101 Common Skin Diseases

Cysts and Cystic Hamartomas

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…

A Clinical Atlas of 101 Common Skin Diseases

Darier’s Disease

…tically determined disorder in which numerous closely set keratotic papules are present on the skin, especially the trunk, in nail units, and on mucous membranes, particularly the palate, but also rarely in other parts of the gastrointestinal tract….

A Clinical Atlas of 101 Common Skin Diseases

Chondrodermatitis Nodularis Helicis

A papule, sometimes eroded, ulcerated, crusted, or keratotic, on a helix or antehelix consequent to the effects of persistent trauma. Because a lesion of chondrodermatitis nodularis helicis results from the effects of external trauma, analogous to p…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…or smooth-surfaced, yellow-orange (“apple jelly”) papules that house epithelioid histiocytes in tuberculoid pattern, as is seen in lupus vulgaris, or in sarcoidal pattern, as is observed in sarcoidosis, and for vegetations that represent…

Histologic Diagnosis of Inflammatory Skin Diseases

Lichen planus

…teriform or linear Individual lesions Purple polygonal planar papules that may become confluent to form plaques Variations clinical “Bullous” lichen planus arises from seemingly normal skin as a consequence of acceleration extraordinary…

Histologic Diagnosis of Inflammatory Skin Diseases

Selection of the Site

…mpered with in any manner. Such a lesion usually is a macule, papule (which may be scaly), papulovesicle, or vesicle. A pustule, such as in pustular psoriasis and suppurative infundibulitides/folliculitides, also is an appropriate lesion for harvest…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Nodular and Diffuse Dermatitis

…es joined by relatively few histiocytes presented itself as a papule of lichen nitidus at an early stage of that process. Figure 5.185 A&B. Life of a nodule (fully developed): lichen nitidus. The nodule composed of epithelioid histiocytes and…

Histologic Diagnosis of Inflammatory Skin Diseases

Arthropod assaults

…n a line, but usually distributed randomly Individual lesions Papules, papulovesicles, vesicles, and, at times, bullae; crusts form consequent to resolution of vesicles and/or the effects of excoriation Course Usually resolve without treatment in a m…

Histologic Diagnosis of Inflammatory Skin Diseases

Identification of Basic Patterns: Skin: Perivascular Dermatitis

…d in the interstitium should call to mind pruritic urticarial papules and plaques of pregnancy (PUPPP) (Fig. 5.27 A&B) on one hand and a drug eruption made up of macules and papules on the other (Fig. 5.28 A&B). Sometimes PUPPP is accompanied…