Ultra-high b-value diffusion-weighted imaging features of the prostatic leiomyoma-case report

Yanguang Shen,Zhonghua Sun,Haiyi Wang,Lu Ma,Huiyi Ye,Yan Zhong,Yingwei Wang,Jinjin Pan

doi:10.1186/s12880-017-0234-4

Yanguang Shen, Zhonghua Sun + Show 6 more

Open Access

https://doi.org/10.1186/s12880-017-0234-4

Copy DOI

Abstract

BackgroundLeiomyoma of the prostate is a rare benign tumor arising from smooth muscle fibers. Most cases are incidental findings observed during pathological examinations after resection of the prostate. To the best of our knowledge, only few studies have reported the conventional magnetic resonance imaging (MRI) findings of such tumors; however, no reports have described the ultra-high b-value diffusion-weighted imaging (DWI) and apparent diffusion coefficient (ADC) findings of prostatic leiomyomas.Case presentationWe report MR imaging characteristics and surgical pathologic findings of a case of prostatic leiomyoma treated by robot-assisted transperitoneal laparoscopic approach. Typical MR features showed a homogeneous lesion with slightly hypointense signal compared to the skeletal muscle on T2-weighted images, and isointense signal relative to the muscle on T1-weighted images with fat suppression, which collectively demonstrate apparent homogeneous enhancement with a non-enhanced envelope. A slightly hyperintense signal compared to the skeletal muscle was observed on ultra-high b-value DWI, and higher ADC values were observed as compared to the prostate cancer.ConclusionsProstatic leiomyoma is a benign tumor. This case indicates that MRI features of prostatic leiomyoma are helpful for the differential diagnosis of prostate cancer.

Highlights

Leiomyoma of the prostate is a rare benign tumor arising from smooth muscle fibers
Prostatic leiomyoma is a benign tumor. This case indicates that magnetic resonance imaging (MRI) features of prostatic leiomyoma are helpful for the differential diagnosis of prostate cancer
We present MRI findings of a patient with benign prostate hypertrophy and prostate cancer who was incidentally diagnosed with a prostatic leiomyoma

Summary

Introduction

Leiomyoma of the prostate is a rare benign tumor arising from smooth muscle fibers. Most cases are incidental findings observed during pathological examinations after resection of the prostate. This case indicates that MRI features of prostatic leiomyoma are helpful for the differential diagnosis of prostate cancer. To the best of our knowledge, only six reports have described the conventional MRI findings of such tumors, and no studies have presented the ultra-high b-value diffusionweighted imaging and ADC findings of prostatic leiomyomas [3, 4].

Results

Conclusion