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Table 3.7

Age-Adjusted SEER Incidencea , by Year and Sex

By Adapted Classification Scheme for Tumors of Adolescents and Young Adultsb

All Races, Ages 15-19

Both Sexes

Site 1975-2018 2009-2018
Count Rate AAPCc Count Rate AAPCc
All Sites Combined 17,446 21.3 0.8* 4,808 24.4 0.8*
1. Leukemias 2,065 2.5 0.9* 551 2.8 0.9*
2. Lymphomas 4,212 5.2 0.2 1,072 5.4 0.2
3. CNS, intracranial, intraspinal 1,679 2.1 0.6* 446 2.3 0.6*
4. Osseous & chondromatous neoplasms 1,309 1.6 0.4 314 1.6 0.4
5. Soft tissue sarcomas 1,219 1.5 0.1 287 1.5 0.1
6. Germ cell and trophoblastic neoplasms 2,029 2.5 0.0 514 2.6 -3.4
7. Melanoma and skin carcinomas 1,217 1.5 -0.1 259 1.3 -3.4*
8. Carcinomas (excluding skin) 3,231 4.0 2.1* 1,168 5.9 5.1*
9. Miscellaneous specified neoplasms, NOS 406 0.5 2.5 178 0.9 1.3
10. Unspecified malignant neoplasms 62 0.1 - - - -

Males

Site 1975-2018 2009-2018
Count Rate AAPCc Count Rate AAPCc
All Sites Combined 9,133 21.9 0.7* 2,476 24.6 0.7*
1. Leukemias 1,231 2.9 0.7* 319 3.2 0.7*
2. Lymphomas 2,271 5.4 0.3 601 6.0 0.3
3. CNS, intracranial, intraspinal 959 2.3 0.5 242 2.4 0.5
4. Osseous & chondromatous neoplasms 866 2.1 0.6 223 2.2 0.6
5. Soft tissue sarcomas 652 1.6 0.3 162 1.6 0.3
6. Germ cell and trophoblastic neoplasms 1,509 3.6 0.9* 404 4.0 0.9*
7. Melanoma and skin carcinomas 484 1.2 0.4 103 1.0 0.4
8. Carcinomas (excluding skin) 932 2.2 2.7* 323 3.2 7.3*
9. Miscellaneous specified neoplasms, NOS 195 0.5 - 91 0.9 -
10. Unspecified malignant neoplasms 28 0.1 - - - -

Females

Site 1975-2018 2009-2018
Count Rate AAPCc Count Rate AAPCc
All Sites Combined 8,313 20.8 0.7* 2,332 24.2 0.7*
1. Leukemias 834 2.1 1.2* 232 2.4 1.2*
2. Lymphomas 1,941 4.9 0.0 471 4.9 0.0
3. CNS, intracranial, intraspinal 720 1.8 0.7* 204 2.1 0.7*
4. Osseous & chondromatous neoplasms 443 1.1 0.0 91 0.9 0.0
5. Soft tissue sarcomas 567 1.4 0.0 125 1.3 0.0
6. Germ cell and trophoblastic neoplasms 520 1.3 -0.6 110 1.1 -0.6
7. Melanoma and skin carcinomas 733 1.8 -0.3 156 1.6 -3.3*
8. Carcinomas (excluding skin) 2,299 5.7 1.7* 845 8.8 3.0
9. Miscellaneous specified neoplasms, NOS 211 0.5 - 87 0.9 -
10. Unspecified malignant neoplasms 34 0.1 - - - -

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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