A<unk>  is a localized, subcutaneous cavity containing saliva. It is caused by trauma (e.g. violence, accident or surgery) or infection. They most commonly develop about 8–14 days after injury. They are a relatively common complication following surgery to the salivary glands, commonly parotidectomy (removal of the parotid gland). In this case the<unk>  is the result of saliva draining out of remaining parotid tissue, and occurs about 5 to 10% of cases of superficial (partial) parotidectomy. It is usually not painful, and a mild and self-limiting complication, and is managed by repeated aspiration (draining) of the swelling via a needle after the skin has been disinfected with an antibacterial. The fluid is usually a clear yellow, and contains amylase (in contrast to fluid from a seroma). Pressure dressings do not tend to be used. They are rarely chronic, however if persistent a surgical drain may be required. Botulinum toxin injections have also been used to manage this condition.
Sialocele
Encephalocele
Lipomeningomyelocele
Lateral meningocele syndrome
Choroid plexus cyst
Omphalocele
Subdural hygroma
Cystic hygroma