Head and Neck Imaging

CT Features in Non-Epithelial Tumor of Urinary Bladder

Author:LI Lei, FENG Kai, DENG Yin-liang, et al.

affiliation:Department of Radiology, 184 Hospital of PLA, Yingtan 335000, Jiangxi Province, China

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Abstract

Objective To describe the CT imaging features in non-epithelial tissue tumor of bladder. Methods CT Findings of 8 cases with pathology proved non-epithelial tissue of the bladder were retrospectively analyzed and literatures were reviewed. Results Leiomyomas (3 cases). They were oval soft tissue masses with homogeneous density and clear boundary on plain CT scan. They showed mild to moderate homogeneous enhancement after contrast administration. Inflammatory myofibroblastic tumor (1 case). On Plain CT, It was heterogeneous hypo-/iso-density with necrosis and blurred boundary. Enhancement manifestations in dynamic contrast scan showed heterogeneous and delayed enhancement, with the adjacent wall of bladder was involved. Paragangliomas(2 cases). They had homogeneous hypo-/iso-density, defined boundary and obvious enhancement with enhanced blood vessels in one of the tumor. Neuroendocrine carcinomas (2 cases) . Carcinoid, one of the cases, showed homogeneous and defined boundary soft tissue mass which was connect the wall of bladder with a pedicel-like structure and stippled calcification. Obvious enhancement after contrast administration could be assessed. Another case was small cell neuroendocrine carcinoma. It showed lobulated, heterogeneous and ill-defined mass. There was heterogeneous enhancement after contrast administration, accompanied with the adjacent wall of bladder and adipose tissue involved. Conclusion There were some CT characteristics about the non-epithelial tissue tumor of bladders. Improvement of diagnostic accuracy could be obtained as clinical data and imaging findings. However, the final diagnosis still relies on pathology.

【Keyword】Bladder; Non-epithelial Tumor; Tomography, X-ray Computed

【Chart number】R737.14;R445.3

【Document Identification Number】A

【DOI】 10.3969/j.issn.1672- 5131.2017.11.028