Indium 111 white blood cell imaging of epididymitis

The clinical diagnosis of epididymitis is frequently substantiated radiographically with pertechnetate 99m (99mTc) testicular scintigraphy and scrotal sonography. Indium 111 (111In) autologous leukocyte imaging in a patient with epididymitis has to our knowledge not been reported previously. The case presented is an elderly man with epididymitis. An 111In-labelled white blood cell scan demonstrated increased tracer accumulation in the region of the right epididymis. This suggests that 111In-labelled leukocyte scanning may be helpful in evaluating an inflammatory process involving the epididymis or testis and potentially may allow for differentiation of epididymitis and orchitis from missed torsion, tumour or cystic lesions.