A<unk> , also referred to as mucus extravasation phenomenon, is a swelling of connective tissue consisting of collected mucin from a ruptured salivary gland duct, which is usually caused by local trauma. The<unk>  is a bluish translucent color, and is more commonly found in children and young adults.
Mucocele
Otic polyp
Chalazion
Sweat gland disease
Chimera 
Brodie abscess
Laryngocele
Nasal polyp