EOD Primary Tumor

Notes

**Note 1:** Code 500 describes locally advanced, but potentially resectable tumor. **Note 2:** Codes 600 and 700 describes locally advanced, technically unresectable tumor.
Code Description SS2018 T
100 Ipsilateral parietal pleura with/without involvement of - Diaphragmatic pleura - Mediastinal pleura - Visceral pleura Confined to pleura (mesothelioma), NOS Localized, NOS L
300 Ipsilateral pleural surfaces all involved - Diaphragmatic, parietal, mediastinal, and visceral With involvement of at least one of the following - Confluent visceral pleural tumor (including any involvement of interlobar fissure) - Contiguous lung involvement, NOS - Diaphragm (Diaphragmatic muscle) - Lung parenchyma (direct extension) - Nodule(s) beneath visceral pleural surface (ipsilateral pleura) RE
500 Ipsilateral pleural surfaces all involved - Diaphragmatic, parietal, mediastinal, visceral With involvement of at least one of the following - Adjacent (connective) tissue, NOS - Endothoracic fascia - Mediastinal fat (mediastinal tissues) - Pericardium, non-transmural or NOS - Solitary focus of tumor extending into the chest wall RE
600 Ipsilateral pleural surfaces all involved - Diaphragmatic, parietal, mediastinal, visceral With involvement at least one of the following - Chest wall (diffuse extension or multifocal masses of tumor) + WITH or WITHOUT associated rib destruction - Mediastinal organs (direct extension) - Pericardium (extension through to the internal surface without pericardial effusion) - Rib RE
700 Ipsilateral pleural surfaces all involved - Diaphragmatic, parietal, mediastinal, visceral With involvement at least one of the following - Brachial plexus - Cervical (neck) tissues - Contralateral pleura (direct contiguous extension) - Heart muscle - Intra-abdominal organs - Myocardium - Pericardium (extension through to the internal surface with pericardial effusion) - Peritoneum (direct transdiaphragmatic extension of tumor) - Spine Further contiguous extension D
800 No evidence of primary tumor U
999 Unknown; extension not stated Primary tumor cannot be assessed Not documented in patient record Death Certificate Only U
(1) Fritz AG, Ries LAG (eds). **SEER Extent of Disease 1988: Codes and Coding Instructions (3rd Edition, 1998)**, National Cancer Institute, NIH Pub. No. 98-2313, Bethesda, MD, 1998 (2) Young JL Jr, Roffers SD, Ries LAG, Fritz AG, Hurlbut AA (eds.). **SEER Summary Staging Manual-2000: Codes and Coding Instructions**, National Cancer Institute, NIH Pub. No. 01-4969, Bethesda, MD, 2001. (3) Collaborative Stage Work Group of the American Joint Committee on Cancer. **Collaborative Stage Data Collection System User Documentation and Coding Instructions, version 02.05**. American Joint Committee on Cancer (Chicago, IL) (4) Gress, D.M., Edge, S.B., Gershenwald, J.E., et al. **Principles of Cancer Staging**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 3-30 (5) Rusch, V.W., et al. **Malignant Plural Mesothelioma**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 457-468