A report analyzing system (1) is described. A text processing unit (2) analyzes a text portion (13, 23, 45) of a report. The text portion is in a natural language. The processing unit identifies a concept (41, 42, 43, 44) in the text portion, to obtain a set of identified concepts. A concept ranking unit (3) ranks the concepts (41, 42, 43, 44) of the set of identified concepts based on a ranking criterion, to obtain a ranking. A concept selector (4) selects at least one concept of the set of identified concepts based on the ranking, to obtain at least one selected concept. An associating unit (5) associates a visual representation (31, 32, 33, 34) with the report based on the at least one selected concept. The selected concept may belong to an ontology, e.g. a medical ontology.