A Study on Etiopathogenesis of Vocal Cord Paresis and Palsy in a Tertiary Centre

To identify patients of vocal cord paresis and palsy and to establish an etiological diagnosis based on a study performed in a tertiary centre. Study was done prospectively in the Department of ENT in KIMS Hospital, Bangalore, for 1 year, from June 2016 to June 2017. 100 patients with vocal cord paresis and palsy were identified and examined by using various tests and investigations to establish the etiology. Most of the patients presented with complaints of change in voice (92%). Some of the other common presenting complaints included noisy breathing and difficulty in swallowing, difficulty in voice production and vocal fatigue and cough. Unilateral paralysis (82%) was found to be more common than bilateral paralysis (18%), of which left (52%) was more commonly affected than right (48%) vocal cord. The most common age group affected was 51-60 years (24%) followed by 61-70 years (19%). Males (60%) were affected more than females (40%) in a ratio of 3:2 and among the affected males 73% were known smokers. The most common cause of vocal cord paresis and palsy was found to be idiopathic (38%), followed by primary laryngeal growths (27%). Other causes included carcinomas of lung, thyroid and oesophagus, traumatic, inflammatory, systemic diseases like Rheumatoid arthritis, Hypertension leading to stroke. Identifying the exact etiopathogenesis of vocal cord paresis and palsy in patients has been difficult and is very important in order to establish a proper diagnostic and treatment protocol for these patients.