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To see how this variable is used in SEER publications and to read about other site recode variables, please see theSite Recode home page.

Site Group ICD-O-2 Site ICD-O-2 Histology (Type) Recode
Oral Cavity and Pharynx
Lip C000-C009 excluding 9590-9989, and sometimes 9050-9055, 9140+ 20010
Tongue C019-C029 20020
Salivary Gland C079-C089 20030
Floor of Mouth C040-C049 20040
Gum and Other Mouth C030-C039, C050-C059, C060-C069 20050
Nasopharynx C110-C119 20060
Tonsil C090-C099 20070
Oropharynx C100-C109 20080
Hypopharynx C129, C130-C139 20090
Other Oral Cavity and Pharynx C140, C142-C148 20100
Digestive System
Esophagus C150-C159 excluding 9590-9989, and sometimes 9050-9055, 9140+ 21010
Stomach C160-C169 21020
Small Intestine C170-C179 21030
Colon and Rectum
Colon excluding Rectum
Cecum C180 excluding 9590-9989, and sometimes 9050-9055, 9140+ 21041
Appendix C181 21042
Ascending Colon C182 21043
Hepatic Flexure C183 21044
Transverse Colon C184 21045
Splenic Flexure C185 21046
Descending Colon C186 21047
Sigmoid Colon C187 21048
Large Intestine, NOS C188-C189, C260 21049
Rectum and Rectosigmoid Junction
Rectosigmoid Junction C199 excluding 9590-9989, and sometimes 9050-9055, 9140+ 21051
Rectum C209 21052
Anus, Anal Canal and Anorectum C210-C212, C218 21060
Liver and Intrahepatic Bile Duct
Liver C220 excluding 9590-9989, and sometimes 9050-9055, 9140+ 21071
Intrahepatic Bile Duct C221 21072
Gallbladder C239 21080
Other Biliary C240-C249 21090
Pancreas C250-C259 21100
Retroperitoneum C480 21110
Peritoneum, Omentum and Mesentery C481-C482 21120
Other Digestive Organs C268-C269, C488 21130
Respiratory System
Nose, Nasal Cavity and Middle Ear C300-C301, C310-C319 excluding 9590-9989, and sometimes 9050-9055, 9140+ 22010
Larynx C320-C329 22020
Lung and Bronchus C340-C349 22030
Pleura C384 22050
Trachea, Mediastinum and Other Respiratory Organs C339, C381-C383, C388, C390, C398, C399 22060
Bones and Joints C400-C419 excluding 9590-9989, and sometimes 9050-9055, 9140+ 23000
Soft Tissue including Heart C380, C470-C479, C490-C499 excluding 9590-9989, and sometimes 9050-9055, 9140+ 24000
Skin excluding Basal and Squamous
Melanoma of the Skin C440-C449 8720-8790 25010
Other Non-Epithelial Skin C440-C449 excluding 8000-8004, 8010-8045, 8050-8082, 8090-8110, 8720-8790, 9590-9989, and sometimes 9050-9055, 9140+ 25020
Breast C500-C509 excluding 9590-9989, and sometimes 9050-9055, 9140+ 26000
Female Genital System
Cervix Uteri C530-C539 excluding 9590-9989, and sometimes 9050-9055, 9140+ 27010
Corpus and Uterus, NOS
Corpus Uteri C540-C549 excluding 9590-9989, and sometimes 9050-9055, 9140+ 27020
Uterus, NOS C559 27030
Ovary C569 27040
Vagina C529 27050
Vulva C510-C519 27060
Other Female Genital Organs C570-C589 27070
Male Genital System
Prostate C619 excluding 9590-9989, and sometimes 9050-9055, 9140+ 28010
Testis C620-C629 28020
Penis C600-C609 28030
Other Male Genital Organs C630-C639 28040
Urinary System
Urinary Bladder C670-C679 excluding 9590-9989, and sometimes 9050-9055, 9140+ 29010
Kidney and Renal Pelvis C649, C659 29020
Ureter C669 29030
Other Urinary Organs C680-C689 29040
Eye and Orbit C690-C699 excluding 9590-9989, and sometimes 9050-9055, 9140+ 30000
Brain and Other Nervous System
Brain C710-C719 excluding 9530-9539, 9590-9989, and sometimes 9050-9055, 9140+ 31010
Cranial Nerves Other Nervous System C710-C719 9530-9539 31040
C700-C709, C720-C729 excluding 9590-9989, and sometimes 9050-9055, 9140+
Endocrine System
Thyroid C739 excluding 9590-9989, and sometimes 9050-9055, 9140+ 32010
Other Endocrine including Thymus C379, C740-C749, C750-C759 32020
Lymphoma
Hodgkin Lymphoma
Hodgkin - Nodal C024, C098-C099, C111, C142, C379, C422, C770-C779 9650-9667 33011
Hodgkin - Extranodal All other sites 33012
Non-Hodgkin Lymphoma
NHL - Nodal C024, C098-C099, C111, C142, C379, C422, C770-C779 9590-9595, 9670-9677, 9680-9688, 9690-9698, 9700-9717, 9823, 9827 33041
NHL - Extranodal All sites except C024, C098-C099, C111, C142, C379, C422, C770-C779 9590-9595, 9670-9677, 9680-9688, 9690-9698, 9700-9717 33042
All sites except C024, C098-C099, C111, C142, C379, C420-C422, C424, C770-C779 9823, 9827
Myeloma   9731-9732 34000
Leukemia
Lymphocytic Leukemia
Acute Lymphocytic Leukemia   9821, 9826, 9828 35011
Chronic Lymphocytic Leukemia C420, C421, C424 9823 35012
Other Lymphocytic Leukemia   9820, 9822, 9824-9825, 9850, 9940-9941 35013
Myeloid and Monocytic Leukemia
Acute Myeloid Leukemia   9840-9841, 9861, 9866, 9867, 9871-9874, 9910 35021
Acute Monocytic Leukemia   9891 35031
Chronic Myeloid Leukemia   9863, 9868 35022
Other Myeloid/Monocytic Leukemia   9860, 9862, 9864, 9880, 9890, 9892-9894, 9930 35023
Other Leukemia
Other Acute Leukemia   9801, 9931, 9932 35041
Aleukemic, subleukemic and NOS   9800, 9802-9804, 9830, 9842, 9870, 9900 35043
C420, C421, C424 9827
Mesothelioma +   9050-9055 36010
Kaposi Sarcoma +   9140 36020
Miscellaneous   9720-9723, 9740-9741, 9760-9768, 9950, 9960-9962, 9970, 9980-9984, 9989 37000
C760-C768, C809 excluding 9590-9989, and sometimes 9050-9055, 9140+
C420-C424
C770-C779
Invalid Site or histology code not within valid range or site code not found in this table. 99999

+ The Site Recode variable can be created with or without Mesothelioma (9050-9055) and Kaposi Sarcoma (9140) as separate groupings. The table above documents both possibilities.