[Prolonged asymptomatic presence of a foreign body in the retropharyngeal space].
Ashmarin
M P
MP
Karachkin
V I
VI
Ashmarin
O M
OM
D000368:Aged; D005260:Female; D005547:Foreign Bodies / Q000601:surgery*; D006801:Humans; D007828:Laryngoscopy; D010614:Pharynx / Q000601:surgery*; D013997:Time Factors