An acute epididymo-orchitis, followed by a viral arthritis of the left hand, occurred as complications of a mumps vaccination. In the last 17 years 4 certain cases of orchitis following vaccination have been published in Germany. We describe an additional case and discuss the possible consequences. Markus A. Kuczyk, MD, Department of Urology, Hannover Medical School, D-30623 Hannover (FRG) Intr...