 The edges were marked along the four quadrants, at the 12 o'clock, 3 o'clock, 6 o'clock, and the 9 o'clock positions, and these were sent for frozen section evaluation. 
The edges were marked along the four quadrants , at the 12 o'clock , 3 o'clock , 6 o'clock , and the 9 o'clock positions , and these were sent for frozen section evaluation .