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Table 3.8

Age-Adjusted SEER Incidencea , by Year and Sex

By Adapted Classification Scheme for Tumors of Adolescents and Young Adultsb

All Races, Ages 20-24

Both Sexes

Site 1975-2018 2009-2018
Count Rate AAPCc Count Rate AAPCc
All Sites Combined 29,594 35.2 0.7* 8,010 39.1 -0.1
1. Leukemias 1,902 2.3 0.7* 498 2.4 0.7*
2. Lymphomas 6,018 7.2 0.6* 1,464 7.1 -0.2
3. CNS, intracranial, intraspinal 1,907 2.3 0.0 459 2.2 -3.0*
4. Osseous & chondromatous neoplasms 775 0.9 0.9* 211 1.0 0.9*
5. Soft tissue sarcomas 1,745 2.1 0.7 402 2.0 -1.0*
6. Germ cell and trophoblastic neoplasms 4,616 5.5 0.8* 1,272 6.2 0.8*
7. Melanoma and skin carcinomas 3,569 4.2 0.1 849 4.1 -3.6*
8. Carcinomas (excluding skin) 8,393 10.0 0.8* 2,600 12.7 1.8*
9. Miscellaneous specified neoplasms, NOS 480 0.6 4.2* 213 1.0 4.2*
10. Unspecified malignant neoplasms 174 0.2 - 31 0.2 -

Males

Site 1975-2018 2009-2018
Count Rate AAPCc Count Rate AAPCc
All Sites Combined 14,562 34.1 0.6* 3,902 37.1 0.6*
1. Leukemias 1,099 2.6 0.6* 281 2.7 0.6*
2. Lymphomas 3,247 7.6 0.2 805 7.7 0.2
3. CNS, intracranial, intraspinal 1,071 2.5 0.0 254 2.4 0.0
4. Osseous & chondromatous neoplasms 457 1.1 0.7 124 1.2 0.7
5. Soft tissue sarcomas 1,036 2.4 0.7 236 2.2 -1.5*
6. Germ cell and trophoblastic neoplasms 4,138 9.7 0.8* 1,149 10.9 0.8*
7. Melanoma and skin carcinomas 1,212 2.8 -0.6 262 2.5 -3.2*
8. Carcinomas (excluding skin) 2,032 4.8 1.3* 680 6.5 4.1*
9. Miscellaneous specified neoplasms, NOS 199 0.5 - 92 0.9 -
10. Unspecified malignant neoplasms 66 0.2 - 16 0.2 -

Females

Site 1975-2018 2009-2018
Count Rate AAPCc Count Rate AAPCc
All Sites Combined 15,032 36.4 0.5* 4,108 41.2 -0.4
1. Leukemias 803 1.9 0.0 217 2.2 -0.3
2. Lymphomas 2,771 6.7 0.8* 659 6.6 -0.4
3. CNS, intracranial, intraspinal 836 2.0 0.3 205 2.1 -4.7
4. Osseous & chondromatous neoplasms 318 0.8 1.0* 87 0.9 1.0*
5. Soft tissue sarcomas 709 1.7 0.3 166 1.7 0.3
6. Germ cell and trophoblastic neoplasms 478 1.2 0.3 123 1.2 0.3
7. Melanoma and skin carcinomas 2,357 5.7 0.5 587 5.9 -3.7*
8. Carcinomas (excluding skin) 6,361 15.4 0.7* 1,920 19.3 1.6*
9. Miscellaneous specified neoplasms, NOS 281 0.7 2.7 121 1.2 4.4
10. Unspecified malignant neoplasms 108 0.3 - - - -

Footnotes:

Rates are per 100,000 and are age-adjusted to the 2000 US Std Population (19 age groups - Census P25-1130).

a Rates are from the SEER 9 areas (San Francisco, Connecticut, Detroit, Hawaii, Iowa, New Mexico, Seattle, Utah, Atlanta).

b Adapted from: RD Barr, EJ Holowaty, JM Birch. Classification Scheme for tumors diagnosed in adolescents and young adults. Cancer. 106:7; 1425-1430. (Restricted to malignant tumors and updated based on ICD-O-3 definitions).

c The AAPC is the Average Annual Percent Change and is based on the APCs calculated by Joinpoint over the time range of 1975-2018.

- Statistic could not be calculated. Count and rate based on less than 16 cases for the time interval. AAPC could not be calculated due to insufficient data.

* The AAPC is significantly different from zero (p<.05).

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