A pediatric patient may present with a mass in the floor of the mouth.
Some masses are present at birth.
Some are detected as incidental findings.
Some are large enough to interfere with breathing and/or feeding.
Most common:
(1) benign dermoid or teratoid cyst
(2) epidermal inclusion cyst
(3) lipoma
(4) ranula (mucocele on the floor of the mouth related to the sublingual salivary gland)
Uncommon:
(1) oral lymphangioma
(2) oral foregut cyst (with respiratory type epithelium and numerous goblet cells)
(3) benign cyst or mass of the sublingual salivary gland
(4) imperforate submandibular duct
Rare:
(1) primary carcinoma
(2) malignant lymphoma
where:
• The epidermal inclusion cyst (epidermoid cyst) has an epithelial layer with luminal keratin but no skin adnexal structures. A dermoid cyst has skin adnexal structures.
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