CT detection of fat retention in the bladder after partial nephrectomy

Kazaoka, Junichi; Kusakabe, Makoto; Ottomo, T.; Akahane, Masaaki

doi:10.1007/s00261-017-1117-4

Cited by 7 publications

(4 citation statements)

References 15 publications

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“… 29 Our findings are similar to those described in humans. 26 – 30 Lipid aggregates float on top of urine volume owing to their relative insolubility and lower density, and are distinctly visible on CT. The only other low-density structure floating in a urine volume would be gas.…”

Section: Discussionmentioning

confidence: 99%

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CT features of feline lipiduria and renal cortical lipid deposition

Schwarz

Shorten

Gennace³

et al. 2020

Journal of Feline Medicine and Surgery

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Objectives The aims of this study were to document the presence and prevalence of feline lipiduria and renal lipid deposition on CT, and to search for associations between the presence of lipiduria and sex, urinary tract abnormalities and urolithiasis. Methods The CT examinations of 252 cats were reviewed for the presence of an antigravitational hypodense bubble in the urinary bladder with density values between −180 Hounsfield units (HU) and −20 HU. To identify associations between lipiduria and sex, urinary tract abnormalities and urolithiasis, Fisher’s exact test was used. Renal cortical density measurement was performed in all cats. The Mann−Whitney test was performed to compare renal cortical density between lipiduric and unaffected cats. Results A total of 27 domestic cats (10.7%) had CT evidence of lipiduria. Lipiduric cats had a significantly lower renal cortical density than unaffected cats ( P <0.01). Male neutered cats had a significantly higher frequency of lipiduria and lower renal cortical density compared with female neutered cats ( P <0.01). There was no significant difference between the groups regarding renal, ureteral or urethral abnormalities. Conclusions and relevance Lipiduria is a common physiological phenomenon in cats that can be detected on routine CT examinations. Decreased renal cortical density is associated with lipiduria. This may aid in the diagnosis of feline lipiduria and help to differentiate its presence from other pathological depositions and excretions.

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Section: Discussionmentioning

confidence: 99%

“…Lipid retention in the urinary bladder in humans has been described on CT as an area in the non-dependent urinary bladder lumen. 26 – 30 CT detection of feline lipiduria has not been described.…”

Section: Introductionmentioning

confidence: 99%

CT features of feline lipiduria and renal cortical lipid deposition

Schwarz

Shorten

Gennace³

et al. 2020

Journal of Feline Medicine and Surgery

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“…Also, Komeya and colleagues [19] reported a chyluria case after partial nephrectomy for renal cell carcinoma. Kazaoaka and colleagues [3] retrospectively reviewed postoperative CT images from 123 patients who underwent surgery for renal tumors (92 patients after partial nephrectomy and 31 after total nephrectomy). They found fat retention in the bladder of 5 patients (5.4%) after partial nephrectomy but did not observe any fat-fluid level in the total nephrectomy patients.…”

Section: Discussionmentioning

confidence: 99%

“…Other causes include tumor, abscess, tuberculosis, pregnancy, and congenital conditions [2] . Although relatively rare, fat retention in the urinary bladder may also occur after surgical interventions [3] . The proposed mechanism for chyluria in the surgical setting is through surgical injury to the lymphatic system, which results in fistulous connection to the urinary system [4] .…”

Section: Introductionmentioning

confidence: 99%

Trans-urethral resection of bladder tumor (TURBT) and radiofrequency ablation of renal tumor: Rare etiologies of chyluria

Assaker

Hasbani

Vargas

et al. 2020

Radiology Case Reports

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Chyluria is a rare entity which is caused by abnormal communication between the lymphatic system and the urinary tract, which allows the passage of chyle into the urine. Whenever symptomatic, chyluria presents with lower urinary tract symptoms such as dysuria and hematuria. Multiple imaging modalities can aid in diagnosis such as lymphoscintigraphy, retrograde pyelography, CT scan of the abdomen and pelvis, and magnetic resonance imaging. Numerous etiologies are associated with chyluria among which are surgical interventions. Partial and radical nephrectomy have been reported in a number of symptomatic and asymptomatic cases, while radiofrequency ablation of renal tumors has been very rarely reported. Herein, we report 2 cases of chyluria; one caused by trans-urethral resection of a bladder tumor and another by radiofrequency ablation of a renal oncocytoma. Fat-fluid level in the urinary bladder was seen on both precontrast and postcontrast images of CT scan of the abdomen and pelvis. Cystoscopy demonstrated no evidence of any abnormality of the urinary bladder.

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