Table 1 Histological classification
Malignant tumor | Malignancy excluded | Difficult diagnosis | ||
|---|---|---|---|---|
Type | Subtype | Type | Subtype | |
Papillary carcinoma | Follicular variant | Adenoma | Oxyphilic type | Atypical adenoma |
Encapsulated variant | Other | Well-differentiated tumour of uncertain malignant potential (WDT-UMP) | ||
Invasive variant | Goitre | |||
Tall cell variant | ||||
Columnar cell | ||||
Microcarcinoma | ||||
Oxyphilic cell type | ||||
Clear cell | ||||
Warthin like | ||||
Follicular carcinoma | Minimally invasive (encapsulated) | |||
Widely invasive | ||||
Oxyphilic cell type | ||||
Clear cell type | ||||
Poorly differentiated carcinoma | ||||
Anaplastic carcinoma | ||||
Medullary carcinoma | ||||
Malignant lymphoma | ||||
Metastases | ||||
Other carcinoma | ||||
