Ultrasound Features of Merkel Cell Carcinoma in the Right Upper Arm: A Case Report

Merkel cell carcinoma (MCC) is a rare and aggressive neuroendocrine skin cancer, often presenting with nonspecific clinical features.Early diagnosis is crucial for optimal management.This case report details the ultrasound (US) findings in an 80-year old female with a right upper arm MCC.Ultrasound findings help in diagnosis by characterising benign from malignant lesions.The final diagnosis rests with histopathology.This case underscores the importance of incorporating the US into the evaluation of suspicious skin lesions, particularly in high-risk populations, facilitating earlier diagnosis and timely intervention for this aggressive malignancy.Further studies are needed to establish the full spectrum of US features and their prognostic implications in MCC.