Variations of Neck Structures after Supracricoid Partial Laryngectomy: A Multislice Computed Tomography Evaluation

Abstract

Background: Surgery of laryngeal cancer used to profoundly alter the anatomy of the cervical region. Accurate anatomo-embryologic studies and repeated surgical trials allowed recognition of the cricoarytenoid complex as the smallest anatomofunctional unit able to maintain all the laryngeal functions. Objectives: The aim of this study was to determine whether significant variations of neck anatomical parameters exist after partial laryngectomy, and to analyze whether some of these parameters are associated with a positive functional outcome. Methods: Out of 48 patients treated with a surgical technique according to Mayer-Piquet (cricohyoidoepiglottopexy, CHEP) over a 6-year period, 18 patients were enrolled in the study. Patients were all males with a mean age of 60 years. Cervical structures and their relationships were measured by computed tomography, and the measurements before and after surgery were compared. Results: Our data showed that hyoid bone is modified, both in morphology and position during CHEP. More specifically the relation of the hyoid bone to other neck structures (identified by the α-angle) is modified. The neolarynx and trachea undergo a caudocranial shift. All diameters of the cricoid cartilage remain unchanged after surgery. The position of the epiglottis after CHEP, in particular its relation with the arytenoid cartilage, is closely related to swallowing function outcome and recovery time. Conclusions: Our study showed that these structures, and more specifically the relations among them, undergo significant variations after CHEP. Our results identify some parameters, i.e. the α-angle, width of the hyoid bone and position of the epiglottis, that may predispose to a positive functional outcome after surgery.

Obstructive sleep apnea: is there a difference between vertical and horizontal laryngectomy?

“…Why was OSA more severe in the PVL patients when compared to individuals offered PHL? CT scans of the larynx taken in the late postoperative follow-up of partial horizontal laryngectomy patients indicate the size of the cricoid cartilage ring remained unaltered 14 . There is little material of soft tissue density in the lumen of the cricoid ring after PHL 15 .…”

Three-dimensional computed tomography analysis of neoglottis after supracricoid laryngectomy with cricohyoidoepiglottopexy

“…However, both these methods allow only two-dimensional observation. Because of the altered configuration of the neoglottis, three-dimensional evaluation is superior to two-dimensional observation methods 12 . The present study used our previously reported three-dimensional reconstruction techniques to further explore the three-dimensional morphology of the neoglottis, in additional cases 7 …”

“…12 The present study used our previously reported three-dimensional reconstruction techniques to further explore the three-dimensional morphology of the neoglottis, in additional cases. 7 Mean linear distance measurements demonstrated sufficient movement in both bilateral and unilateral arytenoids.…”