MACIS score used for prognosis of papillary cancer does not include?
**Core Concept**
The MACIS score is a prognostic scoring system used to assess the risk of metastasis and recurrence in patients with papillary thyroid carcinoma. It takes into account several clinical and pathological factors to predict the likelihood of disease spread.
**Why the Correct Answer is Right**
The MACIS score includes several key components, such as:
- **M**etastasis (presence or absence of distant metastasis)
- **A**ge (patient's age at diagnosis)
- **C**ombined diameter (size of the tumor)
- **I**soform (presence or absence of the tall cell or columnar cell variant)
- **S**urvival (patient's survival status)
**Why Each Wrong Option is Incorrect**
**Option A:** The MACIS score does include metastasis as a key component, so this is not the correct answer.
**Option B:** Age is indeed a factor in the MACIS score, as it can influence prognosis.
**Option C:** Combined diameter is also a crucial component of the MACIS score, as larger tumors are associated with a higher risk of metastasis.
**Option D:** While the tall cell or columnar cell variant is an important prognostic factor in papillary thyroid carcinoma, it is not specifically included in the MACIS score, which focuses on age, tumor size, and the presence or absence of metastasis.
**Clinical Pearl / High-Yield Fact**
The MACIS score is a useful tool for clinicians to assess the risk of metastasis and recurrence in patients with papillary thyroid carcinoma, but it is essential to consider other prognostic factors, such as the presence of lymph node metastasis and the patient's overall health status.
**Correct Answer: D.**