A boy with a known CLS diagnosis with a history of coughing during eating, long-lasting wheezing, sputum and inability to intake solid food will be included.

A home based chewing and swallowing training program (CST) will be applied by an experienced physical therapist. The Functional Chewing Training will be used to improve chewing function which has five steps including positioning the child and food, sensory stimulation, chewing training and adjustment of food consistency to improve chewing function. To support hyolaryngeal elevation, laryngeal mobilization will be performed. Hyolaryngeal mobilization will be performed by moving hyolaryngeal complex in right, left and up directions manually.

Videofluoroscopic Swallowing Evaluation (VFSE) will be performed. The swallowing physiology will be evaluated by using 3 ml of liquid and pudding barium during the VFSE. The Penetration and Aspiration Scale (PAS) will be used to determine penetration and aspiration severity, which is scored between 1 to 8. The score of PAS 1 means 'No aspiration', scores from 2 to 5 indicate 'Penetration', and scores from 6 to 8 indicate 'Aspiration'. High score indicates bad situation.

The Pediatric Eating Assessment Tool (PEDI-EAT-10) instrument which has 10 questions to evaluate dysphagia symptom severity in children will be completed.

Total scoring ranges from 0 to 40. Higher scores mean worse outcome.