Fig. 2

A graph representing the co-occurrence of diseases derived from a database of patients with GI (gastrointestinal) cancer. In order to provide a legible figure, this graph, which contains only 100 correlations, is an extract from the whole disease correlation graph. Observe that in this extract some diseases, like I10.00 (Hypertonia), are often correlated with other diseases (central node). Since we aim to synthesize a database for cancer patients, we restrict the search to cancer diseases (main diseases, blue nodes), for instance C83.3 (diffuse large B-Cell lymphoma) or C34.1 (malignant neoplasm of over lobe)