Candidate dactylitis sonographic lesions.
| Lesion | Comments | |
|---|---|---|
| I. | Synovitis | OMERACT definition: synovial hypertrophy with or without Doppler signal16 |
| II. | Tenosynovitis | OMERACT definition: hypoechoic or anechoic material within synovial sheath, with or without fluid, seen in 2 perpendicular planes and which may exhibit Doppler signal16 |
| III. | Superficial edema | Defined by anechoic areas superficial to the tendon within the subcutaneous tissues Presence or absence will be recorded |
| IV. | Soft tissue thickening | Measurements of soft tissue thickness on dorsal and volar aspects |
| V. | Osteoproliferation | Presence or absence of bony irregularities/osteophytes |
| VI. | Intracapsular joint calcification | Presence or absence of intracapsular calcification |
| VII. | Profundus enthesitis | Presence or absence of abnormalities of profundus insertion, vascularity |
| VIII. | Collateral ligament thickening | Presence or absence of thickening, vascularity |
| IX. | Nail abnormalities | Nail plate: presence or absence of bilayer obliteration Nail bed: measurement of mid-bed thickness Nail bed vascularity: semiquantitative scoring; by Doppler signal |