B. Follicular adenoma

B. Follicular adenoma: 

Is a benign encapsulated tumor of the thyroid gland. It shows evidence of follicular differentiation but lacks evidence of capsular and vascular invasion and lacks the nuclear features of papillary carcinoma. 

Key Questions & Answers

1.Write the gross features of the specimen. 

ANS: Specimen shows a well circumscribed, capsulated lesion which is grey-brown and surrounded by normal thyroid tissue. 

2.Write the microscopic features & diagnosis. 

ANS: - Capsule surrounding the lesion.

•     Compression of adjacent normal thyroid tissue.

•     The architecture is different in the lesion compared to normal thyroid. 

Diagnosis: Adenoma – Thyroid. 

3.What type of condition is this?

ANS: It is a benign condition

4.What are the histological patterns in this condition?

ANS:- Micro follicular

•     Macro follicular

•     Mixed

•     Foetal

5.What is the clinical importance of this condition?

ANS: We have to differentiate from follicular carcinoma which is a malignant condition.