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Histology Coding Rules: Understanding Multiple Primary Rules 2007

Learn about histology coding rules for multiple primary tumors, including definitions, tables, and terms for acinar carcinoma of the prostate. Explore coding guidelines for paired organs, mixed codes, and combination histology. Understand when to apply rules for single vs. multiple tumors.

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Histology Coding Rules: Understanding Multiple Primary Rules 2007

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  1. MP/H Task Force Multiple Primary Rules Histology Coding Rules 2007 Other Sites

  2. Equivalent Terms, Definitions and Tables • Acinar carcinoma of prostate • Acini: Tiny sacs contain fluid for ejaculation • Acinar: Adenocarcinoma originates in acini • Acinar not histologic type • Acinar refers to origin in acini

  3. Table 1 Paired organs and sites with laterality Note: This table only includes anatomic sites covered by the Other Sites Rules.

  4. Table 2 Mixed and Combination Codes This table is used to determine mixed and combination codes ONLY Apply the multiple primary rules FIRST. Combination codes are most often used when multiple histologies are present in a single tumor; they are rarely used for multiple tumors. Use a combination code for multiple tumors ONLY when the tumors meet rules for a single primary

  5. Table 2 Continued Use this two-page table to select combination histology codes. Compare the terms in the diagnosis to the terms in Columns 1 and 2. If the terms match, code the case using the ICD-O-3 histology code in column 4. Use the combination codes listed in this table only when the histologies in the tumor match the histologies listed below

  6. MP/H Task Force Multiple Primary Rules Histology Coding Rules 2007 Multiple Primary Rules

  7. MP/H Task Force Multiple Primary Rules Histology Coding Rules 2007 Unknown if Single or Multiple Tumors

  8. MP/H Task Force Multiple Primary Rules Histology Coding Rules 2007 Single Tumor

  9. MP/H Task Force Multiple Primary Rules Histology Coding Rules 2007 Multiple Tumors

  10. MP/H Task Force Multiple Primary Rules Histology Coding Rules 2007 Histology Coding Rules

  11. MP/H Task Force Multiple Primary Rules Histology Coding Rules 2007 Single TumorIn Situ Only

  12. MP/H Task Force Multiple Primary Rules Histology Coding Rules 2007 Single TumorInvasive and In Situ

  13. MP/H Task Force Multiple Primary Rules Histology Coding Rules 2007 Single TumorInvasive Only

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