Herein, we present a patient with a lipidized fibrous histiocytoma, an underrecognized variant of dermatofibroma (cutaneous fibrous histiocytoma). Our patient presented with a nodule on the ankle that showed foamy histiocytes and hyalinized collagen bundles on histology. This case highlights a classic presentation and features of lipidized fibrous histiocytoma, raising further awareness of this distinctive variant of dermatofibroma that should be distinguished from xanthoma and xanthogranuloma.
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http://dx.doi.org/10.5070/D329260776 | DOI Listing |
Int J Surg Pathol
January 2025
Department of Pathology, VCU School of Medicine, Richmond, VA, USA.
The proliferation of recognized neoplasms related to related to rearrangements involving kinase genes, arising in diverse somatic tissue lineages, poses an increasing challenge in surgical pathology. For instance, ALK rearrangements have been observed in diverse neoplasms of epithelial, connective tissue, and hematolymphoid lineages, many of which are associated with overexpression of ALK by immunohistochemistry as a useful biomarker. An even higher order challenge and pitfall would be the scenario where a tumor an ALK rearrangement nonetheless overexpresses the protein, thereby simulating an ALK-defined neoplasm.
View Article and Find Full Text PDFInt J Dermatol
January 2025
Department of Dermatology, San Cecilio University Hospital, Granada, Spain.
Interdiscip Cardiovasc Thorac Surg
December 2024
Faculty of Medicine, University of Iceland, Reykjavik, Iceland.
Angiomatoid fibrous histiocytoma (AFH) is a rare soft tissue tumour that rarely behaves malignant. We report a radical resection of a mediastinal angiomatoid fibrous histiocytoma, which grew invasively into the pulmonary artery wall, was adherent to the posterior aorta and close to the main stem of the left coronary artery. A transection of the aorta was performed using cardiopulmonary bypass and cardioplegic arrest for a safe and radical removal that resulted in symptom relief.
View Article and Find Full Text PDFJ Craniofac Surg
December 2024
Department of Neurosurgery, Weifang People's Hospital, Shandong Second Medical University, Weifang City, Shandong Province, China.
Malignant fibrous histiocytoma (MFH) is a malignancy originating from soft tissues and ranks among the most prevalent soft tissue sarcomas in adults. The considerable complexity and heterogeneity of MFH contribute to an obscure pathogenesis, presenting with atypical clinical manifestations and pathologic features that complicate the clinical diagnostic process. Typically, MFH manifests in the extremities, trunk, and retroperitoneum, while occurrences in the head and neck regions are exceedingly rare.
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