PMC4435278_01
EUS showing a 4.9 x 4.1-cm solid pancreatic body mass with anechoic complex structures.
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F1
An MRI revealed a multi-locular cystic mass with multiple intralesional septations in the pancreatic body; endoscopic ultrasound revealed a 4.9 x 4.1-cm solid mass in the body of the pancreas with anechoic complex structures and a regular border without vascular involvement (Figure 1).
Surgical pathology shows marked nuclear atypia of the mononuclear cells. The osteoclast-like giant cells have bland nuclear features. The mononuclear cells of this tumor show large vesicular nuclei with prominent nucleoli.
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F2
EUS-FNA with 4 aspiration passes obtained a specimen that consisted of atypical spindle cells admixed with multi-nucleated giant cells (Figure 2).