Extensor tendinopathy of the elbow assessed with sonoelastography: histologic correlation

Area of Science:

• Musculoskeletal imaging
• Diagnostic ultrasound
• Elastography

Background:

• Conventional B-mode ultrasound (US) and compression sonoelastography (SEL) are imaging modalities used to assess musculoskeletal conditions.
• Histological evaluation remains the gold standard for diagnosing tendon pathology.

Purpose of the Study:

• To compare the diagnostic agreement between B-mode US and SEL of the common extensor tendons of the elbow against histological findings.
• To determine if a combined imaging approach enhances diagnostic accuracy.

Main Methods:

• Seventy-six common extensor tendons from cadavers were evaluated using B-mode US and SEL.
• B-mode US and SEL findings were graded based on specific criteria.
• Results were compared to histological evaluations of tendon biopsies.

Main Results:

• Histological alterations were present in 55/76 biopsies.
• B-mode US and SEL demonstrated comparable diagnostic performance (accuracy ~83-86%).
• Combining B-mode US and SEL significantly improved sensitivity (96%) and overall accuracy (92%) for detecting pathological findings.

Conclusions:

• The combined use of B-mode US and SEL is more effective than either modality alone in predicting histological abnormalities in common extensor tendons.
• This combined approach shows high efficiency and correlation with histology for diagnosing conditions like lateral epicondylitis.