Search Results for: patch

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Differential Diagnosis in Dermatopathology


…eters or even inches in breadth and in an outline peculiar. A patch of well-developed “lentigo maligna” usually has gradations of color from light brown to black within it. Not every macule of melanoma on sun-battered skin of a face event…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Cutaneous T-cell Lymphoma?

…erythroderma (S?zary syndrome), from subtle scaly macules and patches (guttate parapsoriasis/digitate dermatosis) to pendulous masses (granulomatous slack skin). Mycosis fungoides, in all of its expressions, is one kind of T-cell lymphoma. Different…

Clinical Case Studies

Nevus of Ota

…TATION A 32-year-old Asian man presented with a long-standing patch of gray-brown discoloration under his left eye. (Figure 1) He noted an increasing prominence of the pigmentation over the preceding 15 years. The patient had a history of severe adol…

Clinical Case Studies

Study By Disease

…apsoriasis” (superficial expressions, i.e., macules and patches, of mycosis fungoides) (Quiz #765) Acanthosis nigricans (Quiz #861) Acne vulgaris (Quiz #116) Acne vulgaris, excoriée (Quiz #205) Acquired progressive lymphangioma (Quiz #425) Acra…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Mycosis Fungoides—Increasing in Incidence?

…aracterized by ill-defined orange-red, brown, and even yellow patches or very subtly elevated plaques covered by fine scales. The lesions may resolve with atrophy. Usually they are asymptomatic and tend to be situated on the buttocks, thighs, flexura…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Primary and Secondary Lesions?

…ratching. By convention, the primary lesions include macules, patches, papules, plaques, nodules, tumors, vesicles, pustules, and bullae. Secondary lesions, by contrast, are said to be scales, crusts, erosions, ulcers, excoriations, lichenification,…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Radial Growth Phase versus Vertical Growth Phase of Melanoma?

…olently but progressively as a spreading tan, brown, or black patch in the skin. The lesional cells may be confined to the epidermis (in situ), or they may have competence for local invasion of the papillary dermis (microinvasion), but by definition,…

Histologic Diagnosis of Inflammatory Skin Diseases

Pityriasis rosea

…pattern” on the trunk Individual lesions “Herald patch” or “mother patch” refers to the appearance of the first lesion, i.e., an oval or round plaque with delicate collarettes of scale at its periphery. That lesion hera…

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