The case is reported of amelanotic malignant melanoma of the female urethra mimicking urethral caruncle. A 75-year-old woman complained of a mass of the external meatus. Urethral carunclectomy was performed, but histological diagnosis was amelanotic malignant melanoma. Finally, she underwent en block resection of urethra including bladder neck, uterus, adnexa, vagina, and vulva. As urinary diversion, she underwent a continent cathererizable stoma with an appendicovesicostomy, according to the method described by Mitrofanoff, and Y-V graft for reconstruction of the vulva.
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http://dx.doi.org/10.1111/j.1442-2042.2007.01615.x | DOI Listing |
J Pathol
January 2025
SIREDO Oncology Center (Care, Innovation and Research for Children and AYA with Cancer), Institut Curie, Université Paris Cité, Paris, France.
Rhabdoid tumours (RT) are an aggressive malignancy affecting <2-year-old infants, characterised by biallelic loss-of-function alterations in SWI/SNF-related BAF chromatin remodelling complex subunit B1 (SMARCB1) in nearly all cases. Germline SMARCB1 alterations are found in ~30% of patients and define the RT Predisposition Syndrome type 1 (RTPS1). Uveal melanoma (UVM), the most common primary intraocular cancer in adults, does not harbour SMARCB1 alterations.
View Article and Find Full Text PDFJ Vet Dent
January 2025
Specialty Oral Pathology for Animals, Geneseo, IL, USA.
Oral melanoma is the most common maxillofacial malignancy in dogs. A unique characteristic of melanoma is its ability to mimic other oral tumors, which makes it one of the most challenging oral tumors to diagnose, especially since 30% to 40% of cases are amelanotic. This article presents 2 case reports of dogs with amelanotic oral melanoma that were both diagnostically challenging.
View Article and Find Full Text PDFCancers (Basel)
December 2024
SydPath, St Vincent's Hospital Sydney, Darlinghurst, NSW 2010, Australia.
: Uveal melanomas (UMs) are rare but often deadly malignancies that urgently require viable treatment options. UMs often exhibit tumour heterogeneity, with macroscopic and microscopic differences in morphology between different regions of the same tumour. However, to date, the clinical significance of this and how it may help guide personalised therapy have not been realised.
View Article and Find Full Text PDFCureus
October 2024
General Surgery, SRM Medical College Hospital and Research Centre, Chennai, IND.
Anorectal malignant melanoma (ARMM) is a rare and highly aggressive type of melanoma that originates in the anorectal area. It represents a small fraction of all melanoma cases and is often associated with poor prognosis due to its late presentation and challenging treatment options. Rectal malignant melanoma typically presents with symptoms such as rectal bleeding, pain, and obstructive symptoms.
View Article and Find Full Text PDFAn Bras Dermatol
January 2025
Department of Internal Medicine, Faculty of Medicine, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil; Dermatology Unity, Hospital das Clínicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil.
Background: Acral melanomas (AM) are rare and approximately two-thirds of them occur on the soles of the feet beeing more prevalent in black and Asian individuals. Data on this subtype of melanoma are scarce in the Brazilian population.
Objectives: To describe and correlate the epidemiological, clinical, dermoscopic, and histopathological features of AM a.
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