Establish orientation when examining slides by drawing a line radiating from the 12:00 point of the tissue wafer. Draw the line directly on the slide with a red pen. Also mark the tumor foci on appropriate wafers. This allows the slide to be held directly over the map, and findings can be oriented and drawn on the map more easily, he explained.
Subdividing a specimen with a 'Pac-Man' incision provides an internal orientation.
These images show a Mohs map and the wound that it documents. Note the complementary inking patterns between the map and wound. Photos courtesy Dr. Howard Steinman