This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Management (Carcinoma Cervix), Subject name: Gynaecology & Obstetrics
Histological type of Ca cervix most sensitive to radiotherapy is: 
Select and explain. 
A. Squamous cell carcinoma, B. Adenocarcinoma, C. Endometroid carcinoma, D. Mixed variety
A: Squamous cell carcinoma
Answer: A: Squamous cell carcinoma 
Explanation: Ans: a (Squamous cell carcinoma) Ref: Shaw, 13th ed,p. 412; Harrison's, 16th ed, p. 557Most common variety of Ca cervix is squamous cell carcinoma (epidermoid).It accounts for 95% of all Ca cervix.In a patient with a bulky or barrel shaped cervix (stage IB ) pre operative radiation shrinks the growth sufficiently to permit surgery thereafter.Treatment of Ca cervixStage Ia1 (Micro invasive)- Simple hysterectomyStage Ia2, Ib, IIa- Radical hysterectomy + BLNDOrExt. RT + ICRT (Brachytherapy)Stage IIb- Preop RT - Surgery - PostOp RTOROnly RTStage III, IV- Only RT