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Table 3: Musshoff’s modified Ann Arbor stage classification system for primary gastrointestinal lymphomas.17 |
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EI: Affection detected in one or more gastrointestinal locations on one side of the diaphragm without lymph node infiltration |
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• EI1 Lymphoma limited to mucosa and submucosa or early lymphoma |
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• EI2 Lymphoma spread through the submucosa |
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EII: Involvement of one or more gastrointestinal locations on one side of the diaphragm with lymph node infiltration, regardless of the degree of wall depth infiltration |
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• EII1 Regional node infiltration |
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• EII2 Lymph node infiltration around the regional area |
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EIII: Involvement of the gastrointestinal tract and/or lymph nodes on either side of the diaphragm |
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EIV: Lymphoid mass with or without lymph node infiltrations and diffuse involvement of non-gastrointestinal organs and tissues |