Site-Specific Factor 1

Measured Thickness (Depth)


**Note 1:** Code measured thickness (depth) of tumor, not size. Depth for Merkel cell carcinoma of skin is similar to Breslow tumor depth in melanoma of the skin. * Record the actual measurement in tenths of millimeters (mm) from the pathology report **Note 2:** If tumor depth is noted on multiple specimens (two or more), record the greatest vertical or depth measurement noted on a single specimen; do not add measurements together. * Record in **Site-Specific Factor 19, Tumor Base Transection Status** that the tumor was transected **Note 3:** If tumor is in situ (pTis), code measured thickness as 999.




NAACCR #2880


Code Description
000 No mass/tumor found
001-979 00.1 - 97.9 millimeters (mm)
(Exact measurement to nearest TENTH of mm)

001 0.1 mm
002 0.2 mm
010 1 mm
074 7.4 mm
100 10 mm, 1 centimeter (cm)
105 10.5 mm
979 97.9 mm
980 98.0 mm or larger
988 Not applicable: Information not collected for this case
990 Microinvasion Microscopic focus or foci only and no size given
998 No histologic examination of primary site
999 Unknown or no information
Not documented in patient record