PRL and pituitary gland adenoma: For example, the query for symptoms of disease “prolactin (PRL)-secreting pituitary adenomas” differed from the query for the disease “nonfunctioning pituitary adenoma” using the following query in Cypher: “MATCH (p:dis{disease: 垂体泌乳素腺瘤})-[:dis_rel_sym]->(n), (m)<-[:dis_rel_sym] -(q:dis{disease:垂体无功能腺瘤}), WHERE (m)<>(n), RETURN p,n,q.” As shown in Figure 7, the entities in the middle of the graph are symptoms of both diseases and the entities on the right are typical symptoms unique to the disease “PRL-secreting pituitary adenomas.”