In the neck, the posterior triangle is often quoted as the most common site. However, many series including that at TCH, have reported no difference between the anterior and posterior triangles. There does seem to be a predominance of right sided lesions. Laryngeal involvement is not uncommon. The site of the lesion determines the symptomology.
Many patients have no symptoms other than a soft tumor mass.
Oral cavity and laryngeal involvement can produce stridor, dyspnea, and feeding difficulties. Rapid expansion can occur with hemorrhage into the cyst or infection. In cervicofacial LM, this can lead to life threatening airway obstruction. Diagnosis in the case of large cervical LM is straightforward. The mass is soft, flaccid, fluctuant, with a multilobulated consistency.