Although third branchial cleft anomalies are rare, they are still the second most common congenital lesion of the posterior cervical triangle of the neck after lymphatic malformations.
Third branchial cleft cysts most commonly appear on CT and MRI as unilocular cystic lesions in the posterior cervical triangle.
81) Lymphangiomas most commonly occur in the posterior cervical triangle.
40) Lymphangiomas of the head and neck most commonly occur in the posterior cervical triangle followed by the axilla and the tongue musculature.
Physical examination revealed an 8 x 6-cm, firm mass filling the right supraclavicular fossa and extending into the upper posterior cervical triangle
Spinal accessory nerve palsy commonly occurs as a result of iatrogenic injury, usually during lymph node excision in the posterior cervical triangle.
The majority of spinal accessory nerve lesions occur after lymph node biopsy and tumor resection in the posterior cervical triangle (1-7).
Computed tomography scan of the neck showed multiple, bilateral, necrotic lymph nodes in the posterior cervical triangle
, more notable on the right, with retropharyngeal abscesses (Figure).
Physical examination was unremarkable except for one 2 x 2 cm right submandibular lymph node, a few lymph nodes in the right posterior cervical triangle
and a hyperpigmented maculopapular skin rash involving the upper extremities and the face.
On initial examination in the emergency department, a soft, minimally tender, cystic mass was visible and easily palpable in the right posterior cervical triangle
Most patients present with an asymptomatic cervical mass (typically in the apex of the posterior cervical triangle
or in the superior jugular chain of nodes), serous otitis media, epistaxis, and/or nasal obstruction.
Approximately 75 to 80% of all lymphangiomas arise in the posterior cervical triangle