Table 1.

Patient and tumor characteristics cases (N = 790) examined in the study

CharacteristicN (%)
Gender
 Male385 (49)
 Female405 (51)
Age, ySD)59 ± 16
 <50203 (26)
 50–64271 (34)
 ≥65316 (40)
Tumor
Primary441 (56)
 Grade I35 (8)
 Grade II87 (20)
 Grade III189 (43)
 Not gradeda130 (29)
Metastatic349 (44)
Specimen types
Limited tissue biopsy109 (14)
Excision/resection681 (86)
Samples by site
Mayo401 (51)
UCLA191 (24)
MGH198 (25)

Abbreviation: N, number of samples.

  • aGrading is not traditionally conducted in certain tumors, such as pheochromocytomas and gastrointestinal stromal tumors. Metastatic tumors of all grades were enrolled.