Classical papillary thyroid carcinoma was the most common variant followed by micro papillary carcinoma and follicular carcinoma
. Rare variants found in the study were tall cell and Warthin like variant.
Isolated metastasis of malignant melanoma into follicular carcinoma
of the thyroid gland.
Among patients with malignant results, detected histopathological types were papillary carcinoma in 106 patients, Hurthle cell carcinoma in 9 patients, follicular carcinoma
in 6 patients, medullary carcinoma in 2 patients, poorly differentiated carcinoma in 2 patients, and anaplastic carcinoma in 1 patient.
is another form of thyroid cancer.
Recent evidence described the unique pathological features of Hurthle cell carcinoma, different oncogenesis and clinical characteristics as compared to papillary and follicular carcinoma
of the thyroid gland.
TPC is, together with thyroid follicular carcinoma
, one of the two types of differentiated thyroid cancer (DTC). TPC tends to enter the lymph system via lymph vessels, whereas thyroid follicular carcinoma
tends to travel to lungs and bones via blood circulation.
Table 1: Benign and malignant thyroid tumours Pathological diagnosis n = 676 Benign tumours (n = 195) Percent Follicular adenoma 115 59.0% Hurthle cell adenoma 80 41.0% Malignant tumours (n = 481) Papillary carcinoma 298 62.0% Follicular carcinoma
82 17% Medullary carcinoma 40 8.3% Hurthle cell carcinoma 27 5.6% Anaplastic carcinoma 15 3.1% Lymphoma 6 1.3% Metastatic carcinoma 8 1.7% unspecified carcinoma 3 0.6% Malignant teratoma of thyroid 1 0.2% Malignant solitary fibrous tumour 1 0.2% Table 2: Characteristics of patients who had HCNs (n = 107) Parameter Hurthle cell Hurthle cell p-value carcinoma adenoma No.
Of the 265 lesions we reported, 261 lesions were within the scalp, 1 lesion (follicular carcinoma
metastasis: 1) involved the scalp and skull.
However, the pathologies of these two patients were reported as follicular carcinoma
and solid carcinoma.
Hayashi et al., "Late bone metastasis from an encapsulated follicular carcinoma
of the thyroid without capsular and vascular invasion," Pathology International, vol.
The most common form of thyroid carcinoma in children and adolescents is papillary carcinoma; the incidence of follicular carcinoma
in children is less than 10% of all thyroid cancers .
Sakuma, "Thyroid follicular carcinoma
metastasized to the lung, skull, and brain 12 years after initial treatment for thyroid gland-case report," Neurologia medico-chirurgica, vol.