Primary orbital monophasic synovial sarcoma with calcification: A case report

Figure 1 A/B-scan showed moderate echogenic lesions in the right eye orbital.

Figure 2 Orbital computed tomography scan showed a well-defined soft tissue density mass in the right orbit, with a hyperdense speck suggestive of coarse calcification. A: Axial computed tomography (CT) scans; B: Coronal CT scans.

Figure 3 Orbital magnetic resonance imaging showed a circular-like mass in the right orbital. A: T1-weighted images showed moderate signals, mixed with low-signal regions; B: T2-weighted images showed mixed signals, with high number of moderately high signals, and mixed with low-signal regions; C and D: Most part of the lesion was significantly and unevenly enhanced, whereas local lesions did not exhibit any enhancement.

Figure 4 Histological and immunohistochemical examination. A: The tumor was confirmed as monophasic synovial sarcoma with calcification based on histological analysis (HE, × 200); B-F: Immunohistochemical study revealed positive staining for Bcl-2 (B), CD99 (C), CKpan (D), TLE1 (E), and INI-1 (F) (× 100).

Figure 5 It presented as a well-defined, reddish, with irregularly shaped soft tissue density mass.