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What is All of the following are true about this condition except: and explain in detail?
RANULA - A cystic swelling in the floor of mouth that resembles a frog belly - Term ranula should only be applied to a mucous extravastion cyst that arises from the sublingual gland. ETIOLOGY - Commonly the lesions is induced by local trauma and duct rupture, followed by mucin spillage into th surrounding soft tissues ( Mucosa extravasation phenomenon) - Uncommonly, it is due to obstruction probably caused by mucous plug or a sialolith HISTOPATHOGOLY - Mucin accumulation surrounded by granulation and Fibrous tissue (mucous extravasation phenomenon) - A cyst filled mucin and lining by the ductal epithelium (mucous retention cyst) Clinical features - 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 keep lesion may have a normal color - The size varies from a few to several centimeters in diameter. Very large lesion which may occupy the floor of mouth can also occur. Diagnosis - Diagnosis is usually made clinically Treatment - Surgical removal or marsupialization - MC structure injured during ranula surgery: Submandibular duct.