Metastatic undifferentiated pleomorphic sarcoma diagnosed by endoscopic ultrasound‐guided fine‐needle aspiration

Figures

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  Figure 1. (a) Contrast‐enhanced computed tomography (CT) scan showing a 20‐mm solid mass in the pancreatic tail (arrowhead). (b) Transgastric endoscopic ultrasound‐guided fine needle aspiration for a hypoechoic pancreatic tumor. (c) Photomicrograph of metastatic UPS infiltrating the pancreatic parenchyma (hematoxylin and eosin [HE] stain, ×20), histologically demonstrating spindle‐cell neoplasms with a storiform pattern and focal nuclear pleomorphism (HE, ×200 [small window in the left lower corner]). (d) Positron emission tomography–CT scan showing 18F‐fluorodeoxyglucose uptake in the right palatine tonsil and cervical lymph nodes.

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  Figure 2. (a) Contrast‐enhanced computed tomography (CT) scan showing a 25‐mm hypervascular tumor located ventral to the left anterior renal fascia (arrowhead). (b) Insertion of convex‐array echoendoscopes (GF‐UCT260; Olympus) to the splenic flexure under fluoroscopic guidance. (c) Transcolonic endoscopic ultrasound‐guided fine‐needle aspiration for a hypoechoic abdominal mass. (d) Photomicrograph of undifferentiated pleomorphic sarcoma (arrowheads) located in the paracolic region (HE, loupe view) with a small window of higher magnification in the lower left corner (HE, ×200), showing proliferation of spindle‐shaped rhabdoid cells admixed with inflammatory infiltrates.