This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Clinical Features, Diagnosis, and Pathology, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is least seen in uterine fibroid? \nSelect and explain. \nA. Hyaline degeneration, B. Sarcomatous change, C. Red degeneration, D. Fatty degeneration', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. b. Sarcomatous change (Ref: Shaw's 14/326- 327, 13/e p341, 349-350)The risk of sarcoma developing in a fibroid uterus is approximately 0.5% (Least common secondary change).Secondary Changes in FibroidHyaline degeneration:MC change, more common in central portionQCystic degeneration (after menopause)Fatty degeneration (after menopause)Calcareous degeneration (after menopause)AtrophyQ (after menopause)Red degenerationQ (2nd half of pregnancy)Sarcomatous change:Least common changeQIncidence 0.5% of all fibroidsMore common in intramural and submucous fibroids", 'role': 'assistant'}]