Congenital-
- Thyroglossal cyst,
- Lingual thyroid
Structural-
- Non-toxic goitre, MNG, STN, Cyst
Functional disorders-
- Hypothyroidism
- Hyperthyroidism - Grave’s disease, Toxic adenoma, Toxic MNG,
- Thyrotoxicosis factitia
Thyroiditis-
- Hashimoto’s disease, acute/ subacute
- thyroiditis, Riedel’s thyroiditis
Neoplasm:
- Benign: Follicular adenoma
- Malignant: Papillary, Follicular, MTC, Anaplastic, Lymphoma, Metastatic