This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gynaecological Disorders in Obs., Subject name: Gynaecology & Obstetrics
Least common complication of fibroid is: 
Select and explain. 
A. Menstrual disorder, B. Malignancy, C. Urinary retention, D. Degeneration
B: Malignancy
Answer: B: Malignancy 
Explanation: Ans. is b, i.e. MalignancyRef: Shaw 15th/ed p353-5; Jeffcoate 7th/ed p500-2* Sarcomatous change is seen in 0.2-0.5% of fibroids. It is the least common complication of fibroid.* Sarcomas with malignant behavior have >=10 mitoses/high power field.* M/c fibroid to undergo malignancy is Submucous followed by Intramural. - Ref: Textbook of Gynae Sheila Balakrishnan 1st/ed p163