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CT detection of fat retention in the bladder after partial nephrectomy
Junichi Kazaoka1,2, Masashi Kusakabe3, Taro Ottomo4
1Department of Radiology, NTT Medical Center Tokyo, 5-9-22, Higashigotanda, Shinagawa-ku, Tokyo, 141-8625, Japan. kazaoka-nii@umin.ac.jp.
Abdominal Radiology (New York)
|March 31, 2017
Summary
Fat retention in the bladder is a rare finding after partial nephrectomy for renal tumors, detectable by computed tomography (CT). This condition is typically asymptomatic and resolves spontaneously over time.
Area of Science:
- Urology
- Radiology
- Oncology
Background:
- Renal tumor surgery, particularly partial nephrectomy, involves complex procedures.
- Postoperative complications require careful monitoring and characterization.
Purpose of the Study:
- To determine the frequency of bladder fat retention after renal tumor surgery.
- To identify associated imaging or clinical findings using computed tomography (CT).
Main Methods:
- Retrospective review of postoperative CT scans from 123 patients (92 partial, 31 total nephrectomy).
- Evaluation of preoperative tumor characteristics using the R.E.N.A.L. Nephrometry Score for partial nephrectomy cases.
- Assessment of collecting system repair during surgery.
Main Results:
- Fat retention in the bladder occurred in 5.4% of partial nephrectomy patients, not in total nephrectomy.
- Retention appeared 2-15 months post-surgery and resolved spontaneously in most cases.
- No significant association found between fat retention and collecting system repair, tumor size, or R.E.N.A.L. Nephrometry Score.
Conclusions:
- Bladder fat retention is a rare, CT-detectable postoperative finding after partial nephrectomy.
- The condition is generally asymptomatic and tends to resolve spontaneously.