PMC9021009_01
CT scan of the abdomen demonstrates the right renal mass.
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F1
However, the tumor was pressing the liver, and no defined fat planes were seen (Figure 1).
(A) H&E section from tumor show malignant spindle cells with hyperchromatic nuclei. (B) H&E section show some atypical spindle and round cells with abundant eosinophilic cytoplasm (Rhabdomyolysis differentiation).
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F2
There were different mitotic figures and necrotic areas (Figur 2).
Immunohistochemistry positive reaction for (A) Creatine kinase. (B) Desmin. (C) Myogenin.
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F3
These findings indicated that the tumor arose from the skeletal muscle, leading to the right kidney and the final diagnosis of pleomorphic RMS (Figure 3).
Postoperative abdominopelvic CT scan demonstrates local recurrence and liver metastasis (Arrow).
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F4
Two months after surgery, the patient received chemotherapy (Adriamycin, Ifosfamide, and Vincristine) and radiotherapy, but an abdominopelvic CT scan showed widespread liver metastasis and local recurrence (Figure 4).