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{
"id" : "extension_bas",
"algorithm" : "eod_public",
"version" : "1.0",
"name" : "EOD Primary Tumor",
"title" : "EOD Primary Tumor",
"notes" : "**Note 1:** Involvement of the pharyngeal space (code 300) is defined as posterolateral infiltration from the nasopharynx beyond the buccopharyngeal fascia into the triangular space lateral to the pharynx. \n\n**Note 2:** Parapharyngeal involvement denotes posterolateral infiltration of tumor beyond the pharyngobasilar fascia. The pharyngobasilar fascia is the fibrous layer of the pharyngeal wall between the mucosa and the muscular layer, attached superiorly to the basilar part of the occipital bone and diminishing in thickness as it descends.\n\n**Note 3:** The masticator space primarily consists of the muscles of mastication, the medial and lateral pterygoid, masseter, and temporalis muscles. The space also includes the ramus of the mandible and the third division of cranial nerve V as it passes through the foramen ovale into the suprahyoid neck.",
"footnotes" : "(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\n\n(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.\n\n(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)\n\n(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\n\n(5) Lydiatt, W.M., Patel, S.G., Shah, J.P., et al. **Staging Head and Neck Cancers**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 55-65\n\n(6) Lee, A.W.M., Lydiatt, W.M., Shah, J.P., et al. **Nasopharynx**. In: Amin, M.B., Edge, S.B., Greene, F.L., et al. (Eds.) AJCC Cancer Staging Manual. 8th Ed. New York: Springer; 2017: 103-111",
"last_modified" : "2018-03-12T16:39:58.634Z",
"definition" : [ {
"key" : "eod_primary_tumor",
"name" : "Code",
"type" : "INPUT"
}, {
"key" : "description",
"name" : "Description",
"type" : "DESCRIPTION"
}, {
"key" : "eod_2018_t",
"name" : "EOD 2018 T",
"type" : "ENDPOINT"
}, {
"key" : "ss2018_t",
"name" : "SS2018 T",
"type" : "ENDPOINT"
} ],
"rows" : [ [ "000", "In situ, intraepithelial, noninvasive", "VALUE:Tis", "VALUE:IS" ], [ "100", "Invasive tumor confined to one of the following subsites\n- Inferior wall (superior surface of soft palate)\n- Lateral wall\n- Posterior superior wall (vault)\n\nInvolvement of two or more subsites\n- Lateral wall extending into eustachian tube/middle ear\n- Posterior, inferior, or lateral wall(s)\n\nConfined to nasopharynx, NOS\nLocalized, NOS", "VALUE:T1", "VALUE:L" ], [ "200", "Nasal cavity WITHOUT pharyngeal extension\nOropharynx\nSoft palate, inferior surface including uvula WITHOUT pharyngeal extension\nSoft tissue, NOS (excluding soft tissue of neck)", "VALUE:T1", "VALUE:RE" ], [ "300", "Any site listed in codes 100 or 200 \n- WITH fixation or tumor described only as \n- FIXED with parapharyngeal extension \n\nAdjacent soft tissue involvement\nLateral pterygoid\nMedial pterygoid\nParapharyngeal space\nPrevertebral muscles\nPterygopalatine fossa WITHOUT bone invasion", "VALUE:T2", "VALUE:RE" ], [ "500", "Bone, NOS\nBony structures of skull base\nCartilage, NOS\nCervical vertebra\nFloor of orbit\nHard palate\nParanasal sinuses\nPterygoid structures\nSkull base", "VALUE:T3", "VALUE:RE" ], [ "700", "Brain\nCranial nerve involvement \nHypopharynx\nInfratemporal fossa/masticator space\nIntracranial extension, NOS\nOrbit except bone of floor of orbit \nParotid gland\nSoft tissues of neck", "VALUE:T4", "VALUE:D" ], [ "800", "No evidence of primary tumor\nNo tumor identified, but EBV-positive cervical node(s) involvement", "VALUE:T0", "VALUE:U" ], [ "999", "Unknown; extension not stated\nPrimary tumor cannot be assessed\nNot documented in patient record\n\nDeath Certificate Only", "VALUE:TX", "VALUE:U" ] ]
}
