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. 2013 Feb 15;8(2):e56221. doi: 10.1371/journal.pone.0056221

Table 4. Key phrases extracted from lung cancer discussion boards.

Cluster Label Key phrases UMLS semantic types
1 Symptom pain, symptoms, cough, breathless, chest pain, painful, shortness of breath,coughing up blood, short of breath, wheezing, nausea sosy
2 Complication pneumonia, infection, tuberculosis, bronchitis, asthma, COPD, pleural effusion,emphysema, atelectasis, collapsed lung dsyn, patf
3 Examination cat scan, biopsy, X-ray, pet scan, chest X-ray, scans, MRI, bronchoscopy,imaging, biopsy needle diap
4 Procedure chemo, radiation, chemotherapy, lobectomy, operation, therapy,surgery, removal, radiation therapy, wedge resection topp
5 Drug silicas, tarceva, morphine, chantix, carboplatin, coumadin, alimta, advil, taxol, dilaudid phsu