A case report of testicular plasmacytoma misdiagnosed as lymphoma by ultrasound.

Testicular plasmacytoma is an extremely rare malignant tumour whose clinical manifestations resemble those of common testicular tumours, making preoperative diagnosis challenging. This paper reports a case of a 63-year-old male patient who presented for consultation due to'unintentionally discovering enlargement of the right scrotum for four days'. The ultrasound findings bear a striking resemblance to lymphoma, leading to misdiagnosis as lymphoma on ultrasound. Following radical orchiectomy, pathological and immunohistochemical examination confirmed the diagnosis of plasmacytoma. Although rare, testicular plasmacytoma should be considered as part of the differential diagnosis for testicular masses.