ECRB Tendinopathy: Needling ± PRP After Failure of Rehabilitation

Inclusion Criteria: * Lesion of the ECRB tendon on ultrasonography (\[hypoechogenic area during rest OR hypoechogenic area during active contraction, OR compressibility of the tendon OR doppler signal\] AND \[positive sonopalpation\]) * Failure to rehabilitation program including shockwave therapy defined as the need for the patient undergoing additional therapies Exclusion Criteria: * Presence on ultrasound of an isolated lesion of the superficial epicondylar tendons as described above, with intact ECRB * Presence on ultrasound of any of: radiohumeral synovial material; interruption of the lateral collateral ligament; radial nerve entrapment, i.e. under the arcade of Frohse; osteochondral lesion; joint effusion. Note: calcic enthesophytes are not considered as an exclusion criteria * Clinical presence of cervicobrachialgia, or pain irradiating into the hand * Corticosteroids: oral intake or infiltration on the last 3 months * Proximal radius fracture history * Active inflammatory rheumatic disorders * Diabetes mellitus * Immunocompromized status * Allergy to local anesthetics * Bleeding disorders or current anticoagulation therapy * Other clinically significant concomitant disease states (e.g., renal failure, hepatic dysfunction, cardiopulmonary significant insufficiency, etc.) * Known or suspected non-compliance, drug or alcohol abuse * Inability to follow the procedures of the study, e.g. due to language problems, psychological disorders, dementia, etc. of the participa…