A professional knowledgable of biostatistics and FDA regulation was needed in a lawsuit concerning a female patient who underwent a myomectomy and contracted an unexpected malignant leiomyosarcoma. The virulent sarcoma tumor appeared after the patient had recovered from her operation, which had initially only been meant to remove benign fibroids from her uterus using morcellation. Allegedly, the morcellation instead catalyzed the carcinoma in the patient’s tissue. The rarity of this outcome was striking; the FDA had estimated that only 1 in 498 woman would ever contract an un unexpected leiomyosarcoma in this way, and that only 1 in 532 of those tumors would be malignant. Faced with the conclusion that the procedure might have facilitated this incredibly rare outcome to occur, the woman’s gynecologist was sued for malpractice.