All of the following regarding papillary carcinoma thyroid is true except:
**Core Concept**
Papillary carcinoma of the thyroid is a type of well-differentiated thyroid cancer characterized by its papillary and follicular architecture. It is the most common type of thyroid cancer, accounting for approximately 80-85% of all thyroid cancer cases.
**Why the Correct Answer is Right**
Papillary carcinoma of the thyroid is typically associated with radiation exposure, particularly in childhood, and is more common in females. The cancer cells often exhibit papillary and follicular patterns, and may contain characteristic nuclear features such as ground-glass appearance, nuclear grooves, and intranuclear pseudoinclusions. The cancer tends to spread through lymphatic vessels, often resulting in lymph node metastases.
**Why Each Wrong Option is Incorrect**
**Option A:** Papillary carcinoma of the thyroid is not typically aggressive, with a relatively good prognosis, especially when detected early. Therefore, this statement is false.
**Option B:** Papillary carcinoma of the thyroid often involves the lymph nodes, especially in the lateral neck, making this statement true.
**Option C:** Papillary carcinoma of the thyroid is not typically associated with a family history of the disease, making this statement false.
**Option D:** Papillary carcinoma of the thyroid is often characterized by its papillary and follicular architecture, making this statement true.
**Clinical Pearl / High-Yield Fact**
Papillary carcinoma of the thyroid is more common in females, and radiation exposure, particularly in childhood, is a recognized risk factor. Early detection and treatment can improve prognosis, but lymph node metastases are a common feature of this cancer.
**Correct Answer:** A. Papillary carcinoma of the thyroid is not typically aggressive.