case_images: PMC11116586_01
case_images: Imaging data of the tumor pre- and post-chemotherapy treatment. (A) CT images of the tumor before chemotherapy in transverse, coronal, and sagittal position. (B) CT images of the tumor after two courses of chemotherapy. (C) T1-weighted MR images of the tumor after two courses of chemotherapy.
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case_images: PMC11116586_01_fonc-14-1395233-g002.jpg
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case_images: The Enhanced CT scan ( Figure 2A ) revealed a 8.7x4.7x3.5 cm soft tissue mass and a 1.7x1 cm focal osteolytic bone destruction on the volar surface of the middle section of the left ulna. The MRI ( Figure 2C ) and CT ( Figure 2B ) scan revealed that there was a maximum reduction of approximately 50% in the cross-sectional tumor area, and the extent of involvement in the flexor digitorum profundus and pronator rotundus muscles significantly decreased.
case_images: Postoperative X-ray, postoperative pathological pictures, and physical examination of the wrist joint. (A) Postoperative X-ray of left forearm. (B) The immunohistochemical results of Desmin, under a 100x microscope. (C) The immunohistochemical results of MyoD1, under a 100x microscope. (D) Intraoperative image of the en bloc tumor. (E) Postoperative physical examination.
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case_images: PMC11116586_01_fonc-14-1395233-g003.jpg
case_images: f3
case_images: To remove the soft tissue mass and the ulnar tumor segment, they were excised together in one piece, en bloc ( Figure 3D ), from the flexor digitorum profundus, roughly 3cm away from the pseudocapsule. The postoperative X-ray examination revealed that the bone graft and internal fixation were in good position ( Figure 3A ). Subsequent postoperative immunohistochemistry analysis exhibited positivity for Desmin ( Figure 3B ) and MyoD1 ( Figure 3C ), indicating the presence of these markers in the tumor. Notably, the left wrist joint demonstrated a flexion range of motion (ROM) of approximately 90 , while the extension ROM was slightly limited to 60  ( Figure 3E ).