When your patient coughs blood.
D003937:Diagnosis, Differential; D006396:Hematemesis / Q000175:diagnosis; D006469:Hemoptysis / Q000175:diagnosis* / Q000209:etiology / Q000628:therapy; D006801:Humans; D008875:Middle Aged; D010808:Physical Examination; D012140:Respiratory Tract Diseases / Q000150:complications / Q000175:diagnosis