Imaging manifestations of alveolar soft part sarcoma
10.13929/j.issn.1003-3289.2024.06.023
- VernacularTitle:腺泡状软组织肉瘤影像学表现
- Author:
Pengfei LI
1
;
Fan MENG
;
Hexin FENG
Author Information
1. 内蒙古民族大学附属医院影像中心,内蒙古通辽 028000
- Keywords:
sarcoma,alveolar soft part;
neoplasm metastasis;
diagnostic imaging
- From:
Chinese Journal of Medical Imaging Technology
2024;40(6):907-911
- CountryChina
- Language:Chinese
-
Abstract:
Objective To observe the imaging manifestations of alveolar soft part sarcoma(ASPS).Methods CT,MRI and PET/CT data of 21 patients with pathologically confirmed ASPS were retrospective reviewed,and the imaging findings were analyzed.Results All 21 cases of ASPS presented as single primary lesion,mostly located in lower limbs(9/21,42.86％)and pelvis(5/21,23.81％),with the average maximum diameter of(72.10±42.23)mm.On non-contrast CT imaging,primary lesions appeared as iso-low inhomogeneous density masses(9/9,100％),which obviously heterogeneously enhanced in 6 cases(6/6,100％).Enlarged blood vessel shadows were noticed in 3 cases(3/6,50.00％),especially upper/lower pole of the tumors.The primary lesions presented as iso-slight high signals on non-contrast T1WI,mixed high signals on both T2WI and diffusion weighted imaging(DWI),as well as low signals on apparent diffusion coefficient(ADC)images(18/18,100％),with necrosis and cystic areas within the tumor and empty blood vessel shadows in 15 cases(15/18,83.33％).Heterogeneous enhancement of primary lesions were detected in 9 cases(9/9,100％),while necrosis and cystic areas did not enhance,but empty blood vessel shadows obviously enhanced.PET/CT demonstrated increased FDG uptake in 4 cases(4/4,100％),with the maximum standard uptake value ranged from 4.2 to 7.9.Among 21 cases,distant metastases developed in 19(19/21,90.48％),most frequently to lungs(17/21,80.95％),bones(11/21,52.38％)and lymph nodes(6/21,28.57％).Conclusion ASPS usually occurred in lower limbs and pelvis,which was prone to distant metastasis.The imaging manifestations of primary ASPS mostly presented as large tumors with uneven density,and enlarged blood vessel above and below the tumor were the relative characteristic performances.
