title: Umbilical nodule and abdominal pain. Endometriosis.
mesh_terms: D000005:Abdomen; D000328:Adult; D004715:Endometriosis / Q000473:pathology*; D005260:Female; D006801:Humans; D010146:Pain / Q000209:etiology*; D012878:Skin Neoplasms / Q000473:pathology*; D014472:Umbilicus / Q000473:pathology*