This is a document containing changes only. Do not use in place of the Solid Tumor Rules.
Other Sites - May Update
Terms and Definitions
- All histology tables: Behavior codes were removed unless a histology only occurs with one behavior code
- Table 2: Histology Combination Codes
- 8340 row: Example deleted
- Table 4: Testis Histologies
- 9064 row: Histologies in the example corrected to 9084
- Table 6: Stomach Histologies
- 8144/2 and 8144/3 consolidated to one row
- Table 7: Small Intestine and Ampulla of Vater Histologies
- 8144/2 and 8144/3 consolidated to one row
- Table 9: Liver and Intrahepatic Bile Duct Histologies
- 8470/2 and 8470/3 consolidated to one row
- Table 10: Gallbladder and Extrahepatic Bile Duct Histologies
- 8503/2 and 8503/3 consolidated to one row
- Table 11: Pancreas Histologies
- 8453/2 and 8453/3 consolidated to one row
- 8503/2 and 8503/3 consolidated to one row
- 8470/2 and 8470/3 consolidated to one row
- Table 12: Thyroid Histologies
- 8260 row: Oncocytic variant of PTC code corrected to 8342
- Table 21: C412-C414, C418, C419 added
Multiple Primary Rules
- M Rule: Abstract multiple primaries when separate/non-contiguous tumors are anaplastic carcinoma and any other histologies in the thyroid.
- Note added: “This rule does not apply to multiple tumors that are anaplastic carcinoma and undifferentiated carcinoma.”
- M Rule: Tumors with ICD-O-3 topography codes that differ only at the fourth character…
- Bullet deleted (no longer applies to 2023+ cases):
Peripheral nerves and autonomic nervous system (C47_) (Cases diagnosed 1/1/2007 to 12/31/2017 ONLY)
- Bullet deleted (no longer applies to 2023+ cases):
- The “different subtypes/variants” M rule now comes before the “same row” M rule to be consistent with all other Solid Tumor modules (the order was switched).
- M Rule: Abstract multiple primaries when separate/non-contiguous tumors are two or more different subtypes/variants…
- Histology codes in the bullets were corrected
Other Sites - March Update
Terms and Definitions
- Table 1: Paired Organs and Sites with Laterality
- Row added: “C444 Skin of Scalp and Neck”
- Rows C443 and C445: “If midline, assign code 5” (corrected from code 9)
- Table 2: Histology Combination Codes
- 8255 row, note added: “Code 8255 does not apply to GYN primaries. Continue through the table to determine correct mixed histology code for GYN neoplasms.”
- 8340 row: Note and example added.
- Table 3: Prostate Histologies
- Acinar adenocarcinoma 8140 row
- Subtype/variant deleted:
"Adenocarcinoma with neuroendocrine differentiation 8574/3"(this histology erroneously appeared twice in the table)
- Subtype/variant deleted:
- Acinar adenocarcinoma 8140 row
- Table 4: Testis Histologies
- Germ cell tumor, NOS 9064/3:
- Note added: “The following teratomas are not reportable:
- Teratoma, prepubertal type 9064/0
- Teratoma, mature, prepubertal type 9064/0”
- Note added: “The following teratomas are not reportable:
- Row added: “Seminoma, NOS 9061/3”
- Germ cell tumor, NOS 9064/3:
- Table 12: Thyroid Histologies
- Carcinoma, anaplastic 8021/3 row
- “Carcinoma, Undifferentiated 8020/3” moved from synonyms to subtypes/variants
- Papillary thyroid carcinoma, NOS 8260/3 row
- “And papillary microcarcinoma” added to note and synonyms
- Subtype/variant deleted:
Non-invasive encapsulated follicular variant of papillary thyroid carcinoma 8343/2
- Carcinoma, anaplastic 8021/3 row
- Table 14: Peritoneum Histologies
- Added “as noted in the 5th Ed WHO Female Genital Tumors only” to the intro
- Table 15: Fallopian Tube Histologies
- Serous carcinoma, NOS 8441/3 row
- Subtype/variant added: “Low-grade serous carcinoma 8460/3”
- Serous carcinoma, NOS 8441/3 row
- Table 17: Uterine Cervix Histologies
- Germ cell tumor NOS 9064/3 row
- Subtypes/variants added:
- “Choriocarcinoma NOS 9100/3”
- “Endodermal sinus tumor/Yolk sac tumor 9071/3”
- Subtypes/variants added:
- Mucoepidermoid carcinoma 8430/3 row
- Subtypes/variants deleted:
“Choriocarcinoma NOS 9100/3”“Endodermal sinus tumor/Yolk sac tumor 9071/3”
- Subtypes/variants deleted:
- Germ cell tumor NOS 9064/3 row
- Table 19: Vulva Histologies
- Neuroendocrine tumor, NOS 8240/3 row
- Subtype/variant added: “Neuroendocrine tumor, grade 2 8249/3”
- Synonym removed:
“Neuroendocrine tumor, grade 2”
- Neuroendocrine tumor, NOS 8240/3 row
- Table 20: Soft Tissue Histologies
- Note added: “Table 20 lists sarcomas arising in the soft tissue sites listed below only. Soft tissue neoplasms can arise in other organs. See the site-specific Solid Tumor Modules.”
- Table 21: Bone Histologies
- Chordoma, NOS 9370/3 row
- Subtype/variant added: “Chondroid chordoma 9371/3”
- Row added: “Undifferentiated high grade pleomorphic sarcoma of bone 8830/3”
- Chordoma, NOS 9370/3 row
Multiple Primary Rules
- New M Rule:
- “Abstract multiple primaries when separate/non-contiguous tumors are two or more different subtypes/variants in Column 3, Table 3-21 in the Equivalent Terms and Definitions.”
Histology Coding Rules
- “Coding Histology” section
- Example added to Instruction #2: “Endometrioid carcinoma with squamous differentiation has an ICD-O code of 8570/3”
- New H Rule: “Code 8077/2 (squamous intraepithelial neoplasia, high grade) for the following:…”
- New H Rule: “Code 8148/2 (glandular intraepithelial neoplasia, grade III) for the following:…”
- H Rule: Code the histology when only one histologic type is identified.
- Note 2 and Example added (former Note 2 moved to Note 3)
- H Rule: Code papillary carcinoma, follicular variant of thyroid (8340) when there are multiple papillary and follicular carcinoma subtypes/variants…
- Note added
- H Rule: Code 8077/2 (Squamous intraepithelial neoplasia, high grade) for the following:
- Bullet removed:
“biliary intraepithelial neoplasia, high grade”
- Bullet removed: