Which of the following best represents 'ranula'?
|A||A type of epulis|
|B||A thyroglossal cyst|
|C||Cystic swelling in the floor of mouth|
• A cystic swelling in the floor of mouth that resembles a frog belly".
• Term ranula should only be applied to a mucous extravasation cyst that arises from the sublingual gland
• Commonly the lesion is induced by local trauma and duct rupture, followed by mucin spillage into the surrounding soft tissues (mucous extravasation phenomenon)
• Uncommonly, it is due to obstruction, probably caused by mucous plug or a sialolith
• Mucin accumulation surrounded by granulation and fibrous tissue (mucous extravasation phenomenon)
• A cyst cavity, filled with mucin and lining by the ductal epithelium (mucous retention cyst)
• Chronic inflammation of the cyst wall is present. Infiltration by numerous neutrophils, histiocytes, and plasma cells are common.
• Exclusively present on the floor of mouth
• Usually unilateral, lateral to midline
• Smooth, dome shape, fluctuating and painless swelling
• The color is usually bluish, but deep lesions may have a normal color.
• The size varies from a few to several centimeters in diameter. Very large lesions which may occupy the floor of mouth can also occur.
• Diagnosis is usually made clinically,
• Surgical removal or marsupialization,
• Intraoral ranula with cervical prolongation,
• Plunging ranula extends from the floor of the mouth below the mylohyoid into the neck.
• This is nearly always an extravasation pseudocyst.
• Presents as soft painless, ballottable mass with cross fluctuation.