3-Methods:
Computed tomography (CT) scan of the abdomen revealing edematous pancreatitis of the tail of the pancreas, corroborating a diagnosis of mild acute pancreatitis. Magnetic resonance imaging (MRI) showed a well circumscribed mass measuring 14 mm present at the junction of the body and tail (Figure 1). It is of high signal intensity on T2 low T1 with minimal internal septal enhancement. It is communicating with the pancreatic duct which distally in the tail is at the upper limits of normal measuring 3 mm.
Endoscopic ultrasound (EUS) showed a 13 mm cystic lesion obstructing the Wirsung duct (figure 2). FNA and core biopsy were positive for a small blue cell tumour and positive for CD99. These findings were consistent with extension of Ewing sarcoma (figure 3).