A case of generalized histiocytoma cutis occurring in an atopic and mimicking widespread molluscum contagiosum is described. Immunochemical staining showed that the lesions were positive for factor XIIIa.
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http://dx.doi.org/10.1111/j.1365-2230.1990.tb02143.x | DOI Listing |
Pol J Pathol
January 2025
Department of Dermatology, Medical University of Warsaw, Warsaw, Poland.
Multinucleate cell angiohistiocytoma (MCAH) is a rare benign cutaneous entity. It classically presents as slowly progressive erythematous to violaceous papules on the distal extremities of middle-aged or elderly women. The entity may clinically resemble granuloma annulare, lichen planus, and several cutaneous vascular proliferations.
View Article and Find Full Text PDFPeerJ
December 2024
Department of Veterinary Medicine, Freie Universität Berlin, Institute of Veterinary Pathology, Berlin, Germany.
Canine cutaneous histiocytoma (CCH) is a tumor that originates from dermal Langerhans cells and affects particularly young dogs. The common spontaneous regression of CCH makes it an interesting model in comparative oncology research. Previous studies have indicated that anti-tumor immune responses may be involved, but details remain speculative to date.
View Article and Find Full Text PDFJ Craniofac Surg
November 2024
Department of Plastic and Reconstructive Surgery, Medical College of Wisconsin.
Background: Solitary epithelioid histiocytoma, also known as reticulohistiocytoma, is a rare benign histiocytic proliferation with an unreported incidence that commonly presents as a superficial nodule involving the trunk and extremities of adults. Pathology shows dermal histiocytic infiltration composed of large, eosinophilic histiocytes with "glassy" cytoplasm and oncocytic macrophages. When presenting as part of a systemic disorder, it is called multicentric reticulohistiocytosis, a rare and more aggressive condition characterized by multiple skin and mucosal lesions and arthritis.
View Article and Find Full Text PDFContemp Clin Dent
September 2024
Department of Oral Pathology and Microbiology, Bharati Vidyapeeth (Deemed to be University) Dental College and Hospital, Navi Mumbai, Maharashtra, India.
Fibrous histiocytoma is a benign soft-tissue neoplasm that commonly involves the dermis. It is rare in the oral cavity. This lesion creates a diagnostic dilemma due to its nonspecific clinical appearance and microscopic similarities with other benign fibrous tissue lesions.
View Article and Find Full Text PDFJAAD Case Rep
October 2024
Dermatology Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS) and National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, Maryland.
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