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Franklin Hospital Ear, Nose & Throat (ENT) Surgery - Otolaryngology
Oesophagoscopy
A tiny camera attached to a long tube is inserted into your mouth and passed down through your pharynx into your oesophagus. This allows the surgeon to make a diagnosis either by seeing directly what is causing the problem or by taking a small tissue sample (biopsy).
https://www.healthpoint.co.nz/private/ent-head-neck-surgery/franklin-hospital-ear-nose-throat-ent-surgery/