Reactive adenitis
Bacterial lymphadenitis<unk> 
Cellulitis
Cat-scratch disease
Parotitis
Suppurative parotitis
Viral parotitis
Lymphangitis
Toxoplasmosis
Tularemia
Viral disease
HIV-AIDS
Cytomegalovirus
Epstein-Barr Virus
Fungal disease
Reactive adenitis
Suppurative parotitis
Viral parotitis
HIV-AIDS
Cytomegalovirus
Epstein-Barr Virus
Malignancy
Lymphoma
Metastatic cancer
Rheumatologic Disease
Kawasaki Disease
Systemic lupus erythematosus
Sarcoidosis
Juvenile Idiopathic Arthritis
Langerhans Cell Histiocytosis
Cutaneous Lesions:
Bacillary angiomatosis
Purpura
Hematomas
Angiomas
Dermatofibromas
Nevi
Drug reaction
Phenytoin or Carbamazepine
Postvaccination
Sarcoidosis
Salivary gland diagnoses
Lymphoma
Metastatic cancer
Kawasaki Disease
Systemic lupus erythematosus
Sarcoidosis
Juvenile Idiopathic Arthritis
Langerhans Cell Histiocytosis
Bacillary angiomatosis
Purpura
Hematomas
Angiomas
Dermatofibromas
Nevi
Phenytoin or Carbamazepine
Reactive lymphadenopathy- most common
Viral URI
EBV
CMV
Strep/staph
HIV
Toxoplasmosis
Bartonella henselae- kitten or flea exposure<unk>  (scrofula)
Descending infections from oral cavity
Ludwig's angina
Sialoadenitis (can also be chronic)
Trauma-related
Hematoma
Pseudoaneurysm or AV fistula
Viral URI
EBV
CMV
Strep/staph
HIV
Toxoplasmosis
Bartonella henselae- kitten or flea exposure<unk>  (scrofula)
Ludwig's angina
Hematoma
Pseudoaneurysm or AV fistula
Cancer
HPV-related squamous cell carcinoma
Upper aerodigestive tract squamous cell carcinoma
Metastatic disease
Lymphoma
Parotid tumors
Systemic diseases
Amyloidosis
Sarcoidosis
Sjögren syndrome
HPV-related squamous cell carcinoma
Upper aerodigestive tract squamous cell carcinoma
Metastatic disease
Lymphoma
Parotid tumors
Amyloidosis
Sarcoidosis
Sjögren syndrome
Thyroid nodules or cancer
Goiters
Graves' disease
Hashimoto thyroiditis
Iodine deficiency
Lithium use
Toxic multinodular
Congenital cysts
Branchial cleft cyst
Thyroglossal duct cyst- 2nd most common benign neck mass
Dermoid cyst
Carotid body tumor
Glomus jugulare or vagale tumor
Laryngocele
Lipoma/liposarcoma
Parathyroid cysts or cancer
Graves' disease
Hashimoto thyroiditis
Iodine deficiency
Lithium use
Toxic multinodular
Branchial cleft cyst
Thyroglossal duct cyst- 2nd most common benign neck mass
Dermoid cyst
Tuberculous lymphadenitis
Reactive adenitis
Tuberculosis
Bacterial lymphadenitis
Cryptococcosis
Hodgkin's lymphoma
Cellulitis
Non-Hodgkin's lymphoma