Pediatric tonsillectomy: A short-term and long-term comparison of intracapsular versus extracapsular techniques

To review a cohort of over 2500 patients and investigate the short and long-term outcomes of intracapsular as compared to extracapsular tonsillectomy, and show if the complication rates are comparable between methods.

A multicenter, retrospective chart review was conducted, evaluating pediatric tonsillectomies performed from 2004 to 2014. The electronic medical record was reviewed through December 2018, providing up to 14 years of follow-up data.

Two tertiary care, academic medical centers.

A retrospective chart review was conducted to identify children undergoing tonsillectomy and adenotonsillectomy. A chart review was first performed of patients by a single surgeon (MEG) and then the analysis was repeated using enterprise data warehouse (EDW) to search for complications and interventions using International Classification of Diseases, ninth revision, (ICD-9) and Current Procedural Terminology (CPT) codes. The second surgeon's patients (JLC) patients were added to increase the cohort. Patients were excluded from the review of long-term outcomes if there was less than two-year follow-up. Short-term outcomes examined included rate of post-tonsillectomy hemorrhage and re-presentation for dehydration, while long-term outcomes included rates of peritonsillar abscess and tonsillar regrowth requiring revision tonsillectomy.

A total of 2508 pediatric patients were identified who had undergone tonsillectomy or adenotonsillectomy. In 1456 (58.1%) of these patients, the intracapsular technique was used and in 1052 (41.9%) patients, the extracapsular technique was used. The mean documented follow-up time was 8.2 years. Thirty-five patients (1.4%) were identified with post-tonsillectomy hemorrhage, 2 of these patients (5.7%) with primary hemorrhage and 33 patients (94.3%) with secondary hemorrhage. 11 underwent intracapsular tonsillectomy and 24 underwent extracapsular tonsillectomy (p = 0.0042). The rate of post-tonsillectomy hemorrhage with intracapsular tonsillectomy was 0.76%, compared to 2.3% in the extracapsular group. Three patients (0.12%) undergoing intracapsular tonsillectomy required revision tonsillectomy; no patients in the extracapsular group required revision surgery. Three patients (0.12%) developed peritonsillar abscess post-operatively, two following intracapsular tonsillectomy and one following extracapsular tonsillectomy.

This retrospective review comparing the intracapsular and extracapsular techniques for tonsillectomy provides further evidence of the benefits of this technique. It is worthwhile to continue offering intracapsular tonsillectomy to patients and their families during pre-operative discussions.