case_images: PMC10853841_01
case_images: A multiview computed tomography scan of the abdomen (A-C) showing a large mass occupying the left upper quadrant of the abdomen, with no clear origin or borders between the pancreas, spleen, and stomach (arrows).
case_images: cureus-0016-00000051996-i01.jpg
case_images: PMC10853841_01_cureus-0016-00000051996-i01.jpg
case_images: FIG1
case_images: Further investigation using computed tomography (CT) of the abdomen showed a large necrotic splenic mass with multiple peripheral vascularities of the soft tissue component (approximately 17 x 12.9 x 18.2 cm), as well as possible invasion of the adjacent structures (Figure 1).
case_images: Intraoperative finding of a large mass at the tail of the pancreas and spleen (arrows).
case_images: cureus-0016-00000051996-i02.jpg
case_images: PMC10853841_01_cureus-0016-00000051996-i02.jpg
case_images: FIG2
case_images: The intraoperative finding was a large left hypochondrial mass extending retropancreatically and adhering to the tail of the pancreas (Figures 2, 3).
case_images: Intraoperative view of the partial diaphragmatic resection (arrows).
case_images: cureus-0016-00000051996-i03.jpg
case_images: PMC10853841_01_cureus-0016-00000051996-i03.jpg
case_images: FIG3
case_images: The intraoperative finding was a large left hypochondrial mass extending retropancreatically and adhering to the tail of the pancreas (Figures 2, 3).
case_images: Histopathology of pancreatic neoplasm.. The histological sections show (A) a tumor composed of three cell types, namely, mononuclear neoplastic cells, mononuclear histiocytes, and multinucleated giant cells (osteoclast-like giant cells), in a background of hemorrhage and necrosis. The neoplastic cells (B) are positive for vimentin, PanCK, CK19, and EP-Cam while negative for CD45, synaptophysin, and chromogranin (hematoxylin and eosin stain; 10x).
case_images: cureus-0016-00000051996-i04.jpg
case_images: PMC10853841_01_cureus-0016-00000051996-i04.jpg
case_images: FIG4
case_images: Histopathological examination of the resected specimen revealed an undifferentiated (anaplastic) carcinoma of the pancreas with osteoclast-like giant cells (Figure 4).