• (leiomyoma, benign) A benign neoplasm, originating from smooth muscle cells.
  CDISC Terminology
  Clinical Data Interchange Standards Consortium (CDISC), 2021
• (fibroid) A benign smooth muscle tumor, usually in the uterus or gastrointestinal tract.
  NCI Dictionary of Cancer Terms
  U.S. National Cancer Institute, 2021
• (fibroid) A tumor that is not cancer, which is found in the uterus.
  Harvard Dictionary of Health Terms
  Harvard Medical Publishing, 2011
• (leiomyoma) A benign tumor derived from smooth muscle tissue, also known as a fibroid tumor. They rarely occur outside of the UTERUS and the GASTROINTESTINAL TRACT but can occur in the SKIN and SUBCUTANEOUS TISSUE, probably arising from the smooth muscle of small blood vessels in these tissues.
  NLM Medical Subject Headings
  U.S. National Library of Medicine, 2025
• (leiomyoma) A well-circumscribed benign smooth muscle neoplasm characterized by the presence of spindle cells with cigar-shaped nuclei, interlacing fascicles, and a whorled pattern.
  NCI
  U.S. National Cancer Institute, 2021
• (leiomyoma) Benign tumor derived from smooth muscle, most commonly of the uterus, but also found in the gastrointestinal tract; also called fibroid or fibroid tumor.
  CRISP Thesaurus
  National Institutes of Health, 2006
• A fibroid is a noncancerous tumor composed of muscle and fibrous tissue. It is located in the uterus. Fibroids can cause pain, abnormal vaginal bleeding, constipation, repeated miscarriages, and an urge to urinate frequently or urgently.
  Merck Manuals
  Merck & Co., Inc., 2025
• Leiomyomas are benign soft tissue neoplasms that arise from smooth muscle; they were first described by Virchow in 1854. The hereditary form, which causes, multiple leiomyomas, was originally noted by Kloepfer et al in 1958.
  Medscape
  WebMD, 2025