Epithelioid cell histiocytoma (ECH) is a variant of dermatofibroma that presents typically as a solitary nodule. We report a case of a 20-year-old male who presented with a bleeding nodular lesion on the left arm followed a month later by a nodule on the right nostril. Both lesions had epithelioid cells in the dermis, with focal Factor 13a and CD68 immunoreactivity. The left arm lesion, in addition, showed staghorn vasculature as well. Both lesions were interpreted as ECH. The patient had an unremarkable medical history. To the best of our knowledge, multiple ECHs have not been reported in the literature. An appropriate diagnosis of ECH is important as the differential diagnosis usually includes melanocytic lesions.
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http://dx.doi.org/10.1097/DAD.0b013e31817330e9 | DOI Listing |
J Comp Pathol
January 2025
Department of Pathobiology and Population Medicine, Mississippi State University, 240 Wise Center Drive, Mississippi State, Mississippi 39762, USA.
Histoplasmosis is a rarely reported clinical disease of equids in North America and is historically attributed to Histoplasma capsulatum var. capsulatum. This report details a case of intestinal histoplasmosis with lymphadenitis in an American Mammoth Jackstock donkey from Mississippi.
View Article and Find Full Text PDFClin Cosmet Investig Dermatol
January 2025
Department of Dermatology and Venereology, Faculty of Medicine, Universitas Padjadjaran - Dr. Hasan Sadikin General Hospital, Bandung, West Java, Indonesia.
Introduction: Leprosy is a chronic granulomatous disease caused by and . Meanwhile, leprosy reactions are immunologically mediated episodes of acute or subacute inflammation that occur during the chronic course of the disease. Leprosy and leprosy reaction have a wide range of clinical manifestations, including those resembling psoriatic arthritis.
View Article and Find Full Text PDFSAGE Open Med Case Rep
January 2025
Department of Hepatobiliary Pancreatic and Splenic Surgery Ward Ⅰ, The Affiliated ChuZhou Hospital of Anhui Medical University (The First People's Hospital of Chuzhou), ChuZhou, China.
Hepatic epithelioid angiomyolipoma is a rare mesenchymal liver tumor within the perivascular epithelioid cell tumor family, known for its uncertain malignancy and potential for aggressive behavior. Clinical presentation, laboratory findings, and imaging results lack specificity, making pathological examination critical for definitive diagnosis. This case report presents a 61-year-old male patient with a single tumor in the right liver lobe, measuring approximately 101 mm × 99 mm.
View Article and Find Full Text PDFHum Pathol
January 2025
Department of Pathology and Laboratory Medicine, Emory University School of Medicine, Atlanta, GA, 30322, USA. Electronic address:
Introduction: Extraskeletal myxoid chondrosarcoma (EMC) is a rare sarcoma defined by NR4A3 gene rearrangements, typically featuring uniform cells with eosinophilic cytoplasm and mild atypia, arranged in cords or clusters within a chondromyxoid stroma. A cellular variant, characterized by increased cellular density and a solid growth pattern, has been recognized.
Methods: We encountered three cases of round cell sarcomas, diagnosed as EMC based on NR4A3 or NR4A2 rearrangements.
Ann Diagn Pathol
January 2025
Stanford Medical Center; Stanford, CA, United States of America.
Gamna-Gandy (GG) bodies are sclerosiderotic nodules composed of iron pigment and calcium, that have been described predominantly in the spleens of patients with sickle cell disease. Their formal depiction in the kidney is mainly limited to case reports and small series. We aimed to investigate the incidence of GG bodies and associated clinicopathologic features in consecutive nephrectomies performed for renal tumors.
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