A 70–year old man presented with 4 months history of left scrotal mass and had underwent left orchidectomy following a presumptive diagnosis of testicular tumour. Histopathological diagnosis of testicular tuberculosis was subsequently made, which revealed a case of isolated tuberculous orchitis. Isolated TB orchitis may closely mimic testicular tumour particularly in patients with no history of systemic TB thereby presenting a diagnostic and treatment challenges. It signifies that the careful evaluation of patients with testicular mass is extremely significant for diagnostic accuracy, optimal treatment and avoiding unnecessary surgery in case of testicular tuberculosis.