This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cervical Carcinoma, Subject name: Gynaecology & Obstetrics
Acetic acid staining of cervix shows the following, except: 
Select and explain. 
A. Squamous metaplasia, B. Cervical carcinoma in situ, C. Cervical polyp, D. Cervical dysplasia
C: Cervical polyp
Answer: C: Cervical polyp 
Explanation: Cervical polyp is a common benign tumor on the surface of the cervical canal which has tissues much like the smooth muscle cells seen in a fibroid. The polyp does not pick up active staining with aceti acid because it has mosty 'resting' cells Acetic acid used coagulate the proteins - make the area Acetowhite. Biopsy taken from this area. Acetic acid staining of cervix shows Cervical carcinoma in situ Cervical dysplasia Squamous metaplasia