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Table 2 MACIS scoring and staging

From: Indolent thyroid cancer: knowns and unknowns

MACIS Score components

Metastases

3 if distant spread

Age

3.1 (if age <40 years) or 0.08 × age (if age ≥ 40 year)

Completeness of Resection

1 if incompletely resected, 0 otherwise

Invasion (local)

1 if locally invasive, 0 otherwise

Size

0.3 × tumor size (cm maximum diameter)

MACIS stage

MACIS score threshold

 Stage 1

<6

 Stage 2

6–6.99

 Stage 3

7–7.99

 Stage 4

≥8