Case Report

A Challenging Case of Metastatic Intra-Abdominal Synovial Sarcoma with Unusual Immunophenotype and Its Differential Diagnosis

Table 1

Immunophenotype of the most common mesenchymal tumors in the gastrointestinal tract.

Synovial
sarcoma
GISTIMTLeiomyo
sarcoma
SFTNeurogenic tumor

CK/EMA+
CD117+
TLE-1+
h-Caldesmon+/−+
S100+/−+/−+/−+
SMA+/−+/−++
CD34+/−+
DOG-1+
ALK+
Desmin+++/−

GIST: gastrointestinal stromal tumor; IMT: inflammatory myofibroblastic pseudotumor; SFT: solitary fibrous tumor.