Soft tissue


Staging-abdomen and thorax

Editor-in-Chief: Debra L. Zynger, M.D.
Michael R. Clay, M.D.

Last author update: 1 November 2018
Last staff update: 19 January 2023 (update in progress)

Copyright: 2018-2023,, Inc.

PubMed Search: Staging[TIAB] soft tissue sarcomas of abdomen

Michael R. Clay, M.D.
Page views in 2022: 460
Page views in 2023 to date: 43
Cite this page: Malik F, Clay MR. Staging-abdomen and thorax. website. Accessed February 3rd, 2023.

Pathologic TNM staging of sarcomas of the abdomen and thoracic visceral organs, AJCC 8th edition
Primary tumor (pT)
  • pTX: Primary tumor cannot be assessed
  • pT1: Organ confined tumor
  • pT2: Tumor extension into tissue beyond organ
    • pT2a: Invades serosa or visceral peritoneum
    • pT2b: Extension beyond serosa
  • pT3: Invades another organ
  • pT4: Multifocal involvement
    • pT4a: Multifocal (2 sites)
    • pT4b: Multifocal (3 - 5 sites)
    • pT4c: Multifocal (> 5 sites)
Regional lymph nodes (pN)
  • pN0: No lymph node involvement
  • pN1: Lymph node involvement present

  • pNX is not used for soft tissue tumors and no pN should be reported if no lymph nodes are present
Distant metastasis (pM)
  • pM1: Metastases present
Histologic grade (G)
  • GX: Grade cannot be assessed
  • G1: Total differentiation, mitotic count and necrosis score of 2 or 3
  • G2: Total differentiation, mitotic count and necrosis score of 4 or 5
  • G3: Total differentiation, mitotic count and necrosis score of 6, 7 or 8

AJCC prognostic stage groups
  • Since this is a new classification and still needs data collection, prognostic stage grouping is not yet defined

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