Renal metanephric adenoma mimicking papillary renal cell carcinoma on computed tomography: a case report.
We present a case of renal metanephric adenoma (MA) mimicking papillary renal cell carcinoma (PRCC) on computed tomography (CT). In the present case, double-phase enhanced CT showed a hypovascular right renal tumor with gradual and prolonged enhancement. The renal tumor was surgically removed. Histological examination of the resected specimen showed renal MA. Although the radiological features of renal MA have been described by some authors, only a few reports have mentioned the pattern of enhancement on multiphase enhanced CT. The pattern of enhancement of a renal tumor is likely to be correlated with its pathological features. Since renal MA is thought to be genetically related to PRCC, these two tumors are likely to demonstrate similar radiological features, so that differentiating between them becomes difficult. In patients with a hypovascular renal mass that shows gradual and prolonged enhancement on multiphase enhanced CT, the diagnosis of renal MA should be considered.
Department of Urology, Dokkyo Medical University, Mibu, Japan. a.masuda.dmu@gmail.com
Akinori
A
Masuda
Takao
T
Kamai
Tomoya
T
Mizuno
Tsunehito
T
Kambara
Hideyuki
H
Abe
Shigeki
S
Tomita
Yoshitatsu
Y
Fukabori
Tomonori
T
Yamanishi
Yasushi
Y
Kaji
Ken-Ichiro
K
Yoshida
D000236:Adenoma / Q000000981:diagnostic imaging* / Q000601:surgery; D001706:Biopsy; D002292:Carcinoma, Renal Cell / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D008875:Middle Aged; D009392:Nephrectomy; D011237:Predictive Value of Tests; D014057:Tomography, X-Ray Computed