medical decision support 1 medical decision support 2
Subscribe Sign In

Ultrasound Scoring System of Sassone et al for Ovarian and Extrauterine Masses

Purpose: To use the scoring system of Sassone et al to evluate ovarian masses based on the transvaginal ultrasound findings.

Description

Sassone et al developed a scoring system for the transvaginal ultrasound findings of ovarian or extrauterine adnexal masses that could be used to identify those lesions at risk for being malignant.


Technique: Transvaginal ultrasonography using a variety of probes.

 

Ovarian size:

• An ovary > 5 cm on transvaginal ultrasonography had a 2.5 greater risk of malignancy than smaller ovaries.

 

Feature

Finding

Points

inner wall structure

smooth

1

 

irregularities <= 3 mm

2

 

papillarities > 3 mm

3

 

lesion mostly solid (not applicable)

4

wall thickness in mm

thin (<= 3 mm)

1

 

thick (> 3 mm)

2

 

lesion mostly solid (not applicable)

3

septa in mm

no septa

1

 

thin (<= 3 mm)

2

 

thick (> 3 mm)

3

echogenicity

sonolucent

1

 

low echogenicity

2

 

low echogenicity with echogenic core

3

 

mixed echogenicity

4

 

high echogenicity

5

 

ultrasound score =

= SUM(all 4 features)

 

If the ovary was normal or not seen, then it was considered to have an ultrasound score < 5.

 

Interpretation:

• minimum ultrasound score: 4

• maximum ultrasound score: 15

• A score < 9 indicated a low risk of malignancy.

• A score >= 9 was associated with an increased risk of malignancy ("suspicious").

• Mature teratomas (dermoid cysts) and other benign cysts may have a score >= 9.

 

Performance of ultrasound score:

• good if negative

• sensitivity: 100%

• specificity: 83%

• positive predictive value: 37%

• negative predictive value: 100%


To read more or access our algorithms and calculators, please log in or register.

Specialty

Objective

ICD-10