Mild hoarseness with stridor is seen in:
Unilateral abductor palsy
Bilateral abductor palsy
Laryngomalacia
Tracheal stenosis
(b) Bilateral abductor palsy(Ref. Current Diagnosis & Treatment Otolaryngology, Lalwani, 3rd ed., 478)Laryngomalacia and tracheal stenosis do not affect the VC hence voice remain normal in these though stridor is present.
Larynx