We searched though our Institutional databse all biopsy-proven diagnosis of SFTs with atypical presentations (extrapleural and extraperitoneal tumors).
In particular,
we describe 3 cases of atypical localizations of SFTs with their CT,
MR,
US and PET characteristics.
CASE 1
Initially misdiagnosed as lymphadenopathy,
this submandibular mass was later confirmed to be a SFT (CD34+,
Bcl2+,
CD99+).
Color Doppler US shows a vascularized hypoechoic mass in the submandibular region.
US-guided core needle biopsy was subsequently performed to confirm the diagnosis.
MRI showed hyperintense mass in CE axial/coronal/sagittal T1W,
mildly hipointense in both axial T2W STIR and T2 and highy hyperintense in DWI b=800.
CASE 2
Diffuse aspecific arthralgia was caused by a SFT localized in the left thigh.
Pathology confirmed the diagnosis of SFT (CD34+,
S100-,
EMA-,
Somatostatin receptor II,
III,
V A/B).
68Ga-DOTA-TOC PET/CT shows an avid soft tissue lesion in the left thigh.
MRI showed mildly hyperintensity in coronal FS-T2W,
as well as in CE coronal and axial T1W.
CASE 3
Nasal obstruction and bleeding were caused by nasal localization of SFT.
Pathology confirmed the diagnosis of SFT (MIB1 10%,
CD34 +,
CD31 +,
ActinML+,
Factor XIII+,
Patient 1).
CT showed a hypodense lesion within the left nasal cavity at coronal/sagittal unenhanced CT.
MRI showed a strongly hyperintense lesion in CE coronal T1W,
as well as in the unenhanced sagittal T1W sequence.
In sagittal T2W the lesion appeared slightly hyperintense.