Computed tomography, magnetic resonance imaging, and F-deoxyglucose positron emission computed tomography/computed tomography findings of alveolar soft part sarcoma with calcification in the thigh: A case report

doi:10.12998/wjcc.v8.i15.3349

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World Journal of Clinical Cases

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Case Report

World J Clin Cases. Aug 6, 2020; 8(15): 3349-3354
Published online Aug 6, 2020. doi: 10.12998/wjcc.v8.i15.3349

Computed tomography, magnetic resonance imaging, and F-deoxyglucose positron emission computed tomography/computed tomography findings of alveolar soft part sarcoma with calcification in the thigh: A case report

Zeng-Jie Wu, Tian-Tian Bian, Xiao-Hong Zhan, Cheng Dong, Yan-Li Wang, Wen-Jian Xu

Zeng-Jie Wu, Cheng Dong, Wen-Jian Xu, Department of Radiology, The Affiliated Hospital of Qingdao University, Qingdao 266000, Shandong Province, China

Tian-Tian Bian, Breast Disease Center, The Affiliated Hospital of Qingdao University, Qingdao 266000, Shandong Province, China

Xiao-Hong Zhan, Department of Pathology, The Affiliated Hospital of Qingdao University, Qingdao 266000, Shandong Province, China

Yan-Li Wang, Department of PET/CT, The Second Affiliated Hospital of Qingdao University, Qingdao 266000, Shandong Province, China

Author contributions: Wu ZJ and Bian TT performed the studies, collected data, and drafted the manuscript; Zhan XH and Xu WJ performed the statistical analysis and participated in its design; Dong C and Wang YL participated in data acquisition, analysis, and interpretation and drafted the manuscript; all authors read and approved the final manuscript.

Informed consent statement: Informed written consent was obtained from the patient for publication of this case report and accompanying images.

Conflict-of-interest statement: All Authors declare that there is no conflict of interest.

CARE Checklist (2016) statement: The authors have read the CARE Checklist (2016), and the manuscript was prepared and revised according to the CARE Checklist (2016).

Corresponding author: Wen-Jian Xu, MD, Doctor, Department of Radiology, the Affiliated Hospital of Qingdao University, No. 16 Jiangsu Road, Shinan District, Qingdao 266000, Shandong Province, China. wenjianxu007@163.com

Received: April 10, 2020
Peer-review started: April 10, 2020
First decision: April 22, 2020
Revised: April 27, 2020
Accepted: July 16, 2020
Article in press: July 16, 2020
Published online: August 6, 2020
Processing time: 118 Days and 7.7 Hours

Abstract

BACKGROUND

Alveolar soft part sarcoma (ASPS) is an extremely rare malignant sarcoma, accounting for less than 1% of all soft-tissue sarcomas. However, limited information is available on multimodal imaging [computed tomography (CT), magnetic resonance imaging (MRI), and positron emission computed tomography/computed tomography (PET/CT)] of ASPS.

CASE SUMMARY

This study reports a case of a 35-year-old female patient with ASPS of the left thigh with lung metastasis. The patient presented with a 1-year history of a palpable mass in the lower extremity, which exhibited rapid growth for 3 wk. CT, MRI, and F-deoxyglucose PET/CT examinations were performed. CT showed a slightly hypodense or isodense mass with patchy calcifications. On MRI examination, the mass manifested hyperintensity on T1-weighted, T2-weighted, and diffusion-weighted images with some signal voids. PET/CT images demonstrated an intensely hypermetabolic mass in the left thigh and hypermetabolic nodules in lungs.

CONCLUSION

ASPS should be considered as a possible diagnosis when a slow-growing mass is detected in the soft tissue of the extremities, with hyperintensity and numerous signal voids on T1-weighted, T2-weighted, and diffusion-weighted images and intense F-deoxyglucose uptake on PET/CT. ASPS can have calcifications on CT.

Keywords: Alveolar soft part sarcoma; Calcification; Magnetic resonance imaging; Positron emission computed tomography/computed tomography; Case report

Core tip: Alveolar soft part sarcoma (ASPS) is a rare malignant soft-tissue tumor with a poor prognosis. ASPS have characteristic features on magnetic resonance imaging with hyperintensity and numerous signal voids on T1-weighted and T2-weighted images and intense F-deoxyglucose uptake on positron emission computed tomography/computed tomography images. Magnetic resonance imaging combined with positron emission computed tomography/computed tomography improve the differential diagnosis of ASPS. Calcification can be found on computed tomography images.