Renal actinomycosis with fistulized lumbar abscesses: a case report.

The authors report a case of renal actinomycosis in an adolescent presentin g with two fistulized lumbar abscesses. This rare disease, which generally has a good prognosis, is difficult to diagnose, both clinically and radiolo gically. The positive diagnosis is based on histological examination, more frequently of the nephrectomy operative specimen, than ultrasound-guided fi ne needle aspiration biopsy of an atypical renal tumour. Conservative treat ment with high-dose penicillin gives excellent results.