Vocal cords paralysis
Right sided vocal cord palsy seen in: (DNB Dec 2010)
|D||Right vocal nodule|
This question can be solved easily if you know the course of Left and Right recurrent laryngeal nerve.
As discussed in detail in text:
a. Lt RLN.: Arises from vagus in the mediastinum at the level of arch of aorta loops around it and then ascends into the neck.
b. Rt. RLN: Arises from vagus at the level of subclavian artery, hooks around it and then ascends up.
So, any mediastinal causes viz mediastinal lymphadenopathy and aortic aneurysm would parlyse Lt. RLN. only (ruling out options "b" and "d") Vocal nodule does not cause vocal cord palsy.
Laryngeal carcinoma especially glottic can cause UIL or BIL Vocal Cord paralysis -Conn's Current Theory