Description

Thompson et al reported a risk score for a patient with a solitary fibrous tumor of the orbit. This can help to identify a tumor that is more likely to recur. The authors are from the University of California Los Angeles and the Southern California Permanente Medical Group.


Patient selection: solitary fibrosus tumor (SFT) of the orbit

 

Outcome: recurrence

 

Parameters:

(1) age in years at presentation

(2) tumor size in cm

(3) number of mitoses per 2 square mm

(4) cellularity

(5) cellular and nuclear pleomorphism

(6) tumor necrosis

 

Parameter

Finding

Points

age at presentation

<= 45 years

0

 

> 45 years

1

tumor size

<= 3 cm

0

 

> 3 cm

2

mitoses

<= 4 in 2 square mm

0

 

> 4 in 2 square mm

3

cellularity

low

0

 

moderate to high

1

pleomorphism

low

0

 

moderate to high

1

tumor necrosis

absent

0

 

present

1

 

total score =

= SUM(points for all of the parameters)

 

Interpretation:

• minimum score: 0

• maximum score: 9

 

Total Score

Risk of Recurrence

0

very low

1 or 2

low

3 or 4

intermediate

5 to 9

high

 


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