[A case of acute epididymitis in infancy]

We report a 3-month-old boy who presented with acute right scrotal swelling that was diagnosed to have epididymitis at surgical exploration. Urine culture and urinalysis were negative and IVP revealed no abnormality. White blood count and symptom were improved with chemotherapy. Acute epididymitis in infancy is very rare and this case seems to be the 16th case in Japan.