Search Results for: patch

Therapeutic Strategies in Dermatology

Keratosis Pilaris: Key Points

…l, monomorphous, hyperkeratotic papules with a central spicule, often with an erythematous base or overlying an erythematous patch. On biopsy, these lesions are characterized by keratinous follicular plugging with orthohyperkeratosis to create a…

A Clinical Atlas of 101 Common Skin Diseases

Extramammary Paget’s Disease and Mammary Paget’s Disease

…amammary Paget’s disease is an apocrine carcinoma that begins within the epidermis and presents itself clinically as a patch or a subtle plaque that extends centrifugally for many years before becoming a readily discernible thick plaque, a…

A Clinical Atlas of 101 Common Skin Diseases

Drug Eruptions

An inflammatory process that results from the effects of a drug administered systemically, e.g., by ingestion, inhalation, injection, or application rectally, and manifested usually by lesions distributed widely and symmetrically. Any of the many…

A Clinical Atlas of 101 Common Skin Diseases

Fixed Drug Eruption

Circular orange-red-blue macule(s) or patch(es) that often becomes a papule(s) or plaque(s) and vesiculates, healing with hyperpigmentation, and that occurs repeatedly at the very same cutaneous and/or mucous membrane site(s), especially the…

A Clinical Atlas of 101 Common Skin Diseases

Nummular Dermatitis

An inflammatory process of unknown cause consisting of pruritic coin-shaped lesions of different sizes and made up of vesicles that soon are scratched away, leaving erosions, ulcerations, and crusts as residua.

Histologic Diagnosis of Inflammatory Skin Diseases

Mycosis fungoides

…may be inferred from the presence of tiny globules of serum that often reside in elongated mounds of parakeratosis in early patches of mycosis fungoides. As patches become plaques, the infiltrate of lymphocytes becomes progressively broader and…

Histologic Diagnosis of Inflammatory Skin Diseases

Applicable Terms

…CH [ME. pache (area distinct from that around it)]: A broad, i.e., more than 1.0 cm, flat lesion. A macule, in contrast to a patch, is a flat lesion less than 1.0 cm in greatest diameter. A patch may begin as a macule, as in vitiligo, or it may…

Histologic Diagnosis of Inflammatory Skin Diseases


…may be spared entirely in such lesions, as is the case here. Note how atypical are the lymphocytes, in contrast to those in patches of mycosis fungoides. 11.14.43A: Perivascular dermatosis, patchy lichenoid and slightly spongiotic + 11.14.43B: Many…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Lentigo Maligna?

…indicate rampant confusion about the fundamental nature of that process. If it were understood that that pigmented macule or patch represented a malignant neoplasm of melanocytes, i.e., melanoma, then Hutchinson, and all of the authors who followed…