This data item records the size of a solid primary tumor that has been resected.

Pathologic tumor size is an important prognostic indicator and valuable for clinical practice and research on surgically treated patients for most cancers.

Codes (Refer to the most recent version of SEER Program Coding and Staging Manual for additional instructions.)

000	No mass/tumor found
001	1 mm or described as less than 1 mm (0.1 cm or less than 0.1 cm)
002-988	Exact size in millimeters (2 mm to 988 mm) (0.2 cm to 98.8 cm)
989	989 millimeters or larger (98.9 cm or larger)
990	Microscopic focus or foci only and no size of focus is given
998	Alternate descriptions of tumor size for specific sites: Familial/multiple polyposis: -Rectosigmoid and rectum (C19.9, C20.9) -Colon (C18.0, C18.2-C18.9) If no size is documented: Circumferential: -Esophagus (C15.0-C15.5, C15.8, C15.9) Diffuse; widespread: 3/4s or more; linitis plastica: -Stomach and Esophagus GE Junction (C16.0-C16.6, C16.8, C16.9) Diffuse, entire lung or NOS: -Lung and main stem bronchus (C34.0-C34.3, C34.8, C34.9) Diffuse: -Breast (C50.0-C50.6, C50.8, C50.9)
999	Unknown; size not stated; Not documented in patient record; Size of tumor cannot be assessed; No excisional biopsy or tumor resection done; The only measurement(s) describes pieces or chips; Not applicable