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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A patient with chronic pelvic pain undergoes a hysterectomy. The resected uterus is filled with nodules composed of benign smooth muscle cells. Which of the following terms best describes these nodules?
assistant
The correct answer is  The lesions are the very common leiomyomas of the uterus. The lesions, if numerous or large, may cause chronic pelvic pain, and infeility or pregnancy complications (if they intrude on the uterine cavity). Malignant transformation to leiomyosarcoma is rare (and some authors suggest it may not occur, with uterine leiomyosarcoma being a de novo lesion). Angiosarcomas are malignant tumors of blood vessels. Rhabdomyomas and rhabdomyosarcomas are benign and malignant tumors of skeletal muscle, respectively. Ref: Hoffman B.L., Schorge J.O., Schaffer J.I., Halvorson L.M., Bradshaw K.D., Cunningham F.G., Calver L.E. (2012). Chapter 4. Benign Disorders of the Lower Reproductive Tract. In B.L. Hoffman, J.O. Schorge, J.I. Schaffer, L.M. Halvorson, K.D. Bradshaw, F.G. Cunningham, L.E. Calver (Eds), Williams Gynecology, 2e.