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Uterine tumour. Endoscope view of a leiomyoma (lump at centre right) on a uterus (lower right). A leiomyoma is a benign muscle tumour (myoma). The term is used for benign tumours of smooth muscle, the uterus being one place where smooth muscle is found. An ovary (white, upper centre) is attached to the uterus by a ligament (white, centre left). A large cyst (dark red) is seen on this ovary. The cyst (fluid-filled swelling) has developed during the luteal stage of the menstrual cycle, a stage after the release of an egg from the ovary. A leiomyoma may become malignant, being renamed a leiomyosarcoma, sarcoma referring to its cancerous nature. Photographed on the 26th day of the cycle.
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