Muconephrosis.
We report a case of a mucus-filled kidney (muconephrosis) encountered during laparoscopic nephrectomy for presumed xanthogranulomatous pyelonephritis. Conversion to open nephrectomy and en-bloc right hemicolectomy were necessary because of severe perinephric fibrosis and suspected renal-enteral fistula. Pathologic examination revealed a renal pelvic villous adenoma and diffuse intestinal metaplasia of the urothelium; no enteral communication or gastrointestinal pathologic features were found. Urothelial villous adenoma is extremely rare, and one should consider neoplastic etiologies, including appendiceal mucinous cystadenocarcinoma and mucus-secreting adenocarcinoma of the renal pelvis, in directing the appropriate management of muconephrosis.
Park
Sangtae
S
Department of Urology, University of California, San Francisco, School of Medicine, San Francisco, California 94143-0738, USA.
Meng
Maxwell V
MV
Greenberg
Mathew S
MS
Deng
Donna Y
DY
Stoller
Marshall L
ML
D018253:Adenoma, Villous / Q000150:complications* / Q000473:pathology / Q000601:surgery; D000368:Aged; D005355:Fibrosis; D006801:Humans; D007668:Kidney / Q000473:pathology / Q000601:surgery; D007680:Kidney Neoplasms / Q000150:complications* / Q000473:pathology / Q000601:surgery; D008297:Male; D009093:Mucus; D009392:Nephrectomy / Q000379:methods; D009401:Nephrosis / Q000209:etiology* / Q000473:pathology / Q000601:surgery; D011705:Pyelonephritis, Xanthogranulomatous / Q000150:complications