Inflammatory and infectious Congenital

Acute lymphadenitis

Infectious mononucleosis

Tuberculous lymphadenitis

Cat scratch fever

Sarcoidosis

Thyroglossal duct cyst

Branchial cleft cyst

Cystic hygroma

Hemangioma

Laryngocele

Benign tumors Malignant tumors

Salivary gland tumors

Thyroid nodule or goiter

Lipoma

Carotid body tumor

Laryngeal tumor

Neurogenic tumor (neurofibroma)

Primary:

Salivary gland tumors

Thyroid tumors

Soft tissue sarcoma

Skin tumors

Lymphoma

Metastatic:

Skin cancer

Salivary gland tumors

Thyroid cancer

Adenocarcinoma (breast, GI, GU, lung)

Unknown primary

Thyroid Nodule Differential Diagnosis

Thyroiditis

Grave's disease

Teratoma

Thyroid cancer (papillary, follicular, medullary, anaplastic, lymphoma

Dominant nodule in multinodular goiter

Follicular adenoma

Degeneration or hemmorrhage into a colloid cyst or nodule

Simple cyst

Metastasis to thyroid (breast, kidney, melanoma, or lung)