L4: Thyroid Neoplasm Flashcards
Types of Thyroid Neoplasm
- Benign
- Malignant
Benign Thyroid Neoplasm
Folliclar adenoma
Types of Malignant Thyroid Neoplasm
Dunhill classification
- Primary
- Secondary
Types of Primary Thyroid Cancer
Secondary Thyroid Cancer
Rare
- Metastatic: from colon, kidney, melanoma, breast
- Direct invasion.
CP of Follicular adenoma
Presents as solitary nodules.
DDx of Follicular adenoma
Types of Follicular adenoma
TTT of Follicular adenoma
Surgical treatment
- By excision (preferably a hemithyroidectomy = a lobectomy of the side of the adenoma + isthmectomy.).
Follow up for Follicular adenoma
Prolonged follow up is unnecessary. Why?
- As the remaining thyroid tissue is normal.
Incidence of Malignant Thyroid Tumors
Common in females (3:1)
etiology of Malignant Thyroid Tumors
Inheritance of Cowden Syndrome
Autosomal dominant
Etiology of Cowden Syndrome
Germ cell mutation of PTEN tumor suppressor gene.
CP of Cowden Syndrome
Origin of Differentiated Thyroid carcinoma (DTC)
Derived from follicular cells
Types of Differentiated Thyroid carcinoma (DTC)
- Papillary.
- Follicular carcinomas.
- Papillofollicular.
- Hurthle cell carcinomas.
Incidence of Differentiated Thyroid carcinoma (DTC)
90% of thyroid malignancies
CP of Differentiated Thyroid carcinoma (DTC)
Incidence of thyrotoxicosis in DTCs is 2%.
Spread of Differentiated Thyroid carcinoma (DTC)
- Papillary spreads through nodes
- follicular through blood
Pathology (Characters that histologically indicate malignancy in thyroid neoplasm) …….
Def of Psammoma bodies
Small areas of perivascular calcification in necrosed hyalinized cells.
X-Ray of Psammoma bodies
Incidence of Papillary Carcinoma
Age of Papillary Carcinoma
sex Papillary Carcinoma
Etiology
Papillary Carcinoma
Classification
Papillary Carcinoma
NE
Papillary Carcinoma
Spread
Papillary Carcinoma
ME
Papillary Carcinoma
Prognosis
Papillary Carcinoma
Incidence
Follicular Carcinoma
Age
Follicular Carcinoma
Sex
Follicular Carcinoma
Etiology
Follicular Carcinoma