<unk> s tend to be diagnosed based on difficulty with insertion and manipulation during sialendoscopy, or by sialography or ultrasound.
Salivary duct stricture
Salivary gland atresia
Salivary gland fistula
Salivary gland hypoplasia
Ectopic salivary gland tissue
Salivary gland tumour
Salivary gland aplasia
Retropharyngeal abscess