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Score of Moon et al for Predicting Hypothyroidism in an Asian After Hemithyroidectomy

Description

Moon et al reported a score that can help to identify an Asian patient who may develop hypothyroidism after a hemithyroidectomy. This can help to identify a patient who may require closer monitoring. The authors are from Gyeongsang National University and Gyeongnam Regional Cancer Center in South Korea.


Patient selection: Korean after hemithyroidectomy

 

Outcome: hypothyroidism

 

Parameters:

(1) volume of residual thyroid tissue by ultrasound in cubic cm by ultrasound

(2) body surface area (BSA) in square meters

(3) serum thyrotropin (TSH) concentration prior to surgery in mIU/L

 

volume of the thyroid gland adjusted for BSA =

= (volume in cc) / (BSA)

 

Parameter

Finding

Points

preoperative TSH

<= 1 mIU/L

0

 

1.01 to 2 mIU/L

1

 

> 2 mIU/L

2

BSA adjusted thyroid volume

> 3 cc per square meter

0

 

<= 3 cc per square meter

1

 

where:

• 1 mIU/L was the 34th percentile and 2 mIU/L was the 67th percentile, so tertiles defined.

 

total score =

= SUM(points for both parameters)

 

Interpretation:

• minimum score: 0

• maximum score: 3

• The higher the score the greater the risk for hypothyroidism.

 

Score

Percent Hypothyroid

0

5.3%

1

12%

2

52%

3

85%

 


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