Collaborative Stage Data Set - Revised 05/19/2011 FINAL

Retinoblastoma

CS Site-Specific Factor 5
Linear Choroidal Invasion

Note: Record the greatest linear extent of tumor involvement in the choroid in tenths of millimeters (mm). Use code 030 if stated as 3 mm. Code information from clinical documentation in the medical record or from the pathology report, if resection of the primary tumor is performed.

Code	Description
000	No involvement of choroid
001-979	00.1 - 97.9 millimeters (mm) (Exact length of choroidal involvement to nearest tenth of mm) Examples: 001 0.1 mm 010 1 mm 042 4.2 mm 100 10 mm OR 1 centimeter (cm) 103 10.3 mm
980	98.0 mm or larger
988	Not applicable: Information not collected for this case (May include cases converted from code 888 used in CSv1 for "Not applicable" or when the item was not collected. If this item is required to derive T, N, M, or any stage, use of code 988 may result in an error.)
993	Choroidal linear involvement stated as less than 3 mm
994	Choroidal linear involvement stated as greater than 3 mm
999	Unknown or no information Not documented in patient record