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"Pathway Leap": A New Molecular Phenomenon to Consider in the Pathogenesis of Melanocytic Tumors.
Am J Dermatopathol
December 2024
Department of Cellular Pathology, Hospital El Bierzo, Ponferrada, Spain.
Introduction: The current WHO classification of melanocytic tumors distinguishes 9 pathogenic routes. This classification is based on the conceptual interpretation that melanocytic tumors evolve from benign counterparts, accumulating mutations, eventually developing into melanomas with metastatic and potentially lethal capacity. In this article, we present a molecular study of 2 melanocytic tumors that suggest a "leap" from pathogenic routes IV to I.
View Article and Find Full Text PDFBlue Nevus-Like Metastatic Melanoma in a Patient With Primary Lentigo Maligna Melanoma.
J Cutan Pathol
January 2025
Stritch School of Medicine, Loyola University, Maywood, Illinois, USA.
Metastatic melanoma with unusual histopathology can be diagnostically challenging. One exceptionally rare cutaneous manifestation of metastases is blue-nevus-like metastatic melanoma (BNLMM). A 74-year-old male presented with a blue-gray lesion on his left helix in the same anatomical region of a previously resected lentigo maligna.
View Article and Find Full Text PDFMetastatic multicentric epithelioid angiosarcoma of bone. A case report with pitfalls. Tumor seeding after percutaneous biopsy and hypercalcemia.
J Surg Case Rep
January 2025
Orthopaedic Oncologist Unit, La Paz University Hospital, P° Castellana 261, 28046 Madrid, Spain.
Angiosarcomas are a type of malignant tumor of vascular origin. They represent <1% of all primary bone tumors. The multicentric or metastatic does not differ in its high aggressiveness and poor prognosis.
View Article and Find Full Text PDFConfirmatory diagnosis and successive chemotherapeutic treatments of metastatic skeletal sarcoma: A case report.
Oncol Lett
March 2025
Department of Medical Oncology, Cancer Institute Hospital of Japanese Foundation for Cancer Research, Tokyo 135-8550, Japan.
sarcoma is rare and its clinical features remain unclear. Given the similarity in presentation, it is possible that previously reported cases of Ewing-like adamantinoma may have been sarcoma. The present case report describes a tumor in a 55-year-old man that was originally thought to be a Ewing-like adamantinoma, but was recently found to be an sarcoma following direct sequencing.
View Article and Find Full Text PDFHistopathologic patterns in isthmocele pregnancies.
Ann Diagn Pathol
January 2025
Latifa Hospital, Dubai, United Arab Emirates.
Isthmoceles are defects related to Caesarean section (CS) scars, known to cause secondary infertility and interfere with in-vitro fertilization in women who have had Caesarean deliveries. The etiologies are multifactorial. Isthmoceles, similar to dehiscent CS scars, can be potential sites for ectopic pregnancies and abnormal placentation.
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