CT and MRI features of extragonadal primary seminoma
10.3969/j.issn.1002-1671.2016.04.018
- VernacularTitle:性腺外原发性精原细胞瘤CT 与 MRI 表现
- Author:
Jian LI
;
Kai XIE
;
Honghan GONG
;
Huifang WANG
;
Huifang ZHANG
;
Xianjun ZENG
;
Laichang HE
- Publication Type:Journal Article
- Keywords:
extragonadal;
seminoma;
computed tomography;
magnetic resonance imaging
- From:
Journal of Practical Radiology
2016;32(4):562-565
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate CT and MRI features of extragonadal primary seminoma and improve its diagnostic accuracy.Methods The clinical and imaging features of 8 patients with extragonadal primary seminoma proved by histopathology were analyzed retrospectively.Results In 8 cases,4 cases were located in intracranial regions,4 cases in the abdominal and pelvic cavity.Detailedly,roundlike solid and cystic tumors were seen in the basal ganglia and thalamus in 2 cases.The mass density and signal were inhomogeneous in the necrotic area with slight peritumoral edema and heterogeneous enhancement,and hemorrhage and metastasis of the third ventricle were occurred inone case.Shallow lobulated tumor was occurred in the pineal region forone case,which MRI features included slightly low signal on T1 WI,equal or higher signal on T2 WI,with obvious enhancement and peripheral cystic change.There was one case in the sella area with slight high density on CT routine scan,and on MRI,slight equal signal on T1 WI,equal or higher signal on T2 WI.The pituitary stalk was involved with thickening.Tumor in suprasellar region was obviously enhanced,with a small uniformity enhancement nodule in the mouth of corpus callosum.4 cases were occurred in the abdominal and pelvic cavity,shallow lobulated tumors with varying degrees of necrosis were found on CT with infiltrating growth and slight to moderate enhancement,and swollen lymph nodes were found in retroperitoneal and mesenteric root areas.Conclusion Extragonadal primary seminoma is rare,there are some characteristic imaging findings,which contributes to improve diagnosis accuracy when combining with clinical data.
