Pathologic Assessment of Computerized Tomography Accuracy for the Evaluation of the Laryngeal Cartilaginous Frame Work in Laryngopharyngeal Carcinomas

Thyroid cartilage invasion in laryngeal and hypopharyngeal squamous cell carcinoma treated with total laryngectomy

The objective of this study is to analyze the accuracy of computed tomography in detecting malignant thyroid cartilage invasion. In a retrospective chart review, 120 patients with carcinoma of the larynx and hypopharynx underwent computed tomography before total laryngectomy. These data were compared with the histological specimens. Multidetector computed tomography (MDCT) scan had a positive predictive value (PPV) of 76 % and a negative predictive value (NPV) of 69 %. The specificity of MDCT was 89 % and sensitivity was 46 %. Comparison between radiologic suspected cartilage invasion and histologic results showed a significant correlation (p < 0.02). We found no significant impact of cartilage invasion concerning survival rates (5-year overall survival p = 0.683; 5-year disease-free survival p = 0.711). Preoperative CT scan is an important instrument in detecting neoplastic cartilage invasion.

Laryngopharyngectomy with reconstruction

A wide range of reconstructive options allows the ablative surgeon to resect tumors completely with wide margins. Wide resection is especially important because of the rich lymphatic drainage and submucosal spread seen with carcinomas in the hypopharyngeal area. Postoperative stenosis can be a difficult, recurring problem if the neopharynx does not have enough tissue incorporated into the closure. Therefore, most laryngopharyngectomy procedures benefit from the addition of transposed tissue, either pedicled or using free tissue transfer microvascular techniques. Often the location of the tumor is a major factor in determining which reconstruction is best for the patient. Minimizing the donor-site morbidity must be carefully considered, also.