Malignant Melanoma in the Groin Masquerading as a Vascular Tumour: A Rare Cytodiagnosis.

Malignant melanoma (MM) is an aggressive cutaneous neoplasm tending to metastasise anywhere within the body. It frequently metastasises to the draining lymph nodes. A distinct presentation of MM occurs when metastatic lesions appear in the regional lymph nodes, while the primary tumour remains clinically undetected. Fine needle aspiration cytology (FNAC) is highly sensitive, rapid, and cost-effective. The utility of the FNAC procedure is well established in the patient's diagnostic workup. However, the Indian data on the cytodiagnosis and cytomorphology of metastatic MM are very scarce. We submit a clinicopathological profile of a rare case in a 68-year-old male, where FNAC from an inguinal mass led to the diagnosis of metastatic MM, which mimicked clinically as a vascular tumour. The present case highlights MM's unusual clinical presentation and cytomorphological details through FNAC.

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Copyright © 2024, Giri Goswami et al.

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Human subjects: Consent was obtained or waived by all participants in this study. Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work.