This section features outstanding photographs of clinical materials selected for their educational value or message, or possibly their rarity. The images are accompanied by brief case reports (limit 2 typed pages, 4 references). Our readers are invited to sumit items for consideration. A 65-year-old man presented with chronic intermittent abdominal pain and moderate weight loss.The patient had no significant medical history or previous surgeries. A round, mobile mass was detected in the lower abdomen during his examination and could be detected in different locations at different times during the examination (right lower quadrant and left lower quadrant). No abnormalities were found in his clinical laboratory results. A round mass approximately 9 cm in diameter was detected adjacent to the bladder during abdominal ultrasonography (USG). The mass showed similar features on computed tomography (CT) examination. Further, it was hyperdense and did not have an apparent connection to any adjacent structure (Fig A). The patient underwent a laparotomy that found that the mass was located among the intestinal loops.The mass was also found to be completely mobile, not connected to any organ, and was removed through an open incision. The patient’s postoperative course was uneventful, and he was discharged on postoperative day 5. The surgically removed mass was observed to be a smooth, 9 × 9 × 8 cm body with a shiny outer surface.The mass was very firm, white-gray in color, and had a dense appearance (Fig B). Additionally, there were crater-like depressions on the surface of the mass that were possibly the results of physical impressions. After cutting open the mass, the surface was found to be laminarly arranged in a circumferential fashion.The center of the lesion was composed of a calcified area, approximately 2 × 1 × 0.5 cm. (Fig C). The lesion lacked areas of necrosis or hemorrhage but had a homogenous, concentric appearance that was perceived during sectioning.Classic tissue processing, including formalin fixation, paraffin embedding, and hematoxylin and eosin staining, showed an almost acellular acidophilic, hyalinized tissue throughout the mass, except in the peripheral regions (Fig D). In the peripheral regions, a few cells with acidophilic cytoplasms and normochromatic, spindle-shaped nuclei were observed. Dystrophic calcification was seen focally in the central region of the mass. On the basis of these morphologic findings, an immunohistochemical examination for mesenchymal markers was conducted, but it did not show positive staining for any of the mesenchymal markers tested. The negative immunohistochemical results made the diagnosis of the origin of this tumor very difficult and subjective. This section features outstanding photographs of clinical materials selected for their educational value or message, or possibly their rarity. The images are accompanied by brief case reports (limit 2 typed pages, 4 references). Our readers are invited to sumit items for consideration. This section features outstanding photographs of clinical materials selected for their educational value or message, or possibly their rarity. The images are accompanied by brief case reports (limit 2 typed pages, 4 references). Our readers are invited to sumit items for consideration.