Pharyngitis [Disease/Finding] Tonsillitis [Disease/Finding] 1023281 D014069 Tonsillitis Tonsillitis 90176007 M0021666 C6116 C0040425 Inflammation of the tonsils, especially the PALATINE TONSILS but the ADENOIDS (pharyngeal tonsils) and lingual tonsils may also be involved. Tonsillitis usually is caused by bacterial infection. Tonsillitis may be acute, chronic, or recurrent. N0000002969 Tonsillitis [Disease/Finding] 1023281 D014069 Tonsillitis Tonsillitis 90176007 M0021666 C6116 C0040425 Inflammation of the tonsils, especially the PALATINE TONSILS but the ADENOIDS (pharyngeal tonsils) and lingual tonsils may also be involved. Tonsillitis usually is caused by bacterial infection. Tonsillitis may be acute, chronic, or recurrent. N0000002969