​Differential diagnosis of neck mass

​Differential diagnosis of neck mass 
-esophageal diverticulum 
-kikuchi’s disease / histiocytic necrotizing lymphadenitis 
-autoimmune adenopathy 
-carotid body tumor 
-carotid artery aneurtysm 
-Zenker’s diverticulum 
-cervical rib 
-sarcoidosis 
-metastatic thyroid carcinoma 
-metastasis from squamous cell carcinoma in mouth, pharynx, larynx and upper esophagus 
-thyroglossal duct cyst 
-branchial cleft cyst 
-goiter 
-thyroiditis 
-thyroid tumor 
-parotitis 
-skin abscess
-lymphoma 
-reactive  lymphadenopathy such as pharyngitis, tuberculosis, lymphadenitis, cat scratch disease, lyme disease