Q-5. Bilateral recurrent laryngeal nerve paralysis is seen in
a) Multi-nodular goiter
b) Grave’s disease
c) Riedel thyroiditis
d) Anaplastic thyroid cancer
Answer: Anaplastic thyroid cancer
Explanation:
Bilateral recurrent laryngeal nerve paralysis:
Neuritis or surgical trauma (Thyroidectomy) is the most important causes. Other causes are carcinoma thyroid, Ca esophagus (Cervical) and cervical lymphadenopathy.
The vocal cords lie in median or para-median position due to unopposed action of crico-thyroid muscle.