All patients presented with restricted cervical mobility and all patients had CT and/or MRI scan on admission. The mean abscess volume was 9.4 cm(3). Surgical intervention was performed in all cases, including transoral (n=5), transcervical (n=3) or combined transoral and transcervical (n=2) drainage. In one patient RPA close to the skull base was drained by an MRI-guided transnasal approach. All patients recovered; however, there was one recurrence and in one case surgical tracheotomy was unavoidable during the course of disease. Growth of streptococcal species was verified in six of the examined abscesses. Abscessing lymphadenitis, infection of a cervical cyst, and previous ganglionar local opioid analgesia treatment were identified as causative factors.

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