Summary
A case of malignant leiomyoma, also called leiomyosarcoma of the retroperitoneum is reported occurring in a 54 year old white woman.
Clinically the tumor was identified with the pancreas pre-operatively and pathologically it was found to be embedded in the pancreas.
It cannot be stated with certainty whether the tumor arose primarily in the retroperitoneum and then spread to involve the pancreas, or whether it rose primarily in the pancreas. The research of Golden and Stout would seem to indicate that it rose primarily in the retroperitoneum and then invaded the .pancreas secondarily.
This tumor is generally regarded as originating in the smooth muscle fibers of the vascular system of the affected organs.
It is a rare type of tumor.
The treatment is surgical.
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Bibliography
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Struthers, J.E., Gauss, H. Malignant leiomyoma (leiomyosarcoma) of the retro-peritoneum simulating sarcoma of the pancreas. Amer. Jour. Dig. Dis. 19, 116–120 (1952). https://doi.org/10.1007/BF02876319
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DOI: https://doi.org/10.1007/BF02876319