Frozen Shoulder Treatment With Intra-Articular Corticosteroid Injection and Suprascapular Nerve Block

Inclusion Criteria: * Written informed consent to participate in the study must be obtained from the subject prior to initiation of any study-mandated procedure * Suffering from Frozen Shoulder, defined as: Frozen shoulder is a self-limiting disease characterized by pain and functional restriction in both active and passive shoulder motion lasting more than 1 month, for which radiographic findings of the shoulder joint are unremarkable. * Dutch or French speaking persons * Age ≥ 18 years Exclusion Criteria: * Subjects with posttraumatic or postsurgical stiff shoulder syndrome * History of trauma at the onset of symptoms * Subjects with rheumatologic or neurologic disease involving the shoulder * Subjects with cervical radiculopathy * Coagulation disorder * Hypersensitivity to local anesthetics or MRI contrast agent * Inability to understand the study procedures * Psychiatric illness * Pregnancy * Subjects who have received prior SSNB in the homolateral shoulder * Subjects who have received an IACI in the homolateral shoulder in the 3 months before inclusion• Systematic yeast infections * Hypovolaemia * Infections at the injection site * Medical history of malignant hyperthermia, major conduction disorders, acute cardiac decompensation, shock conditions, convulsions Control subjects for the diagnostic accuracy part of the study protocol * Inclusion criteria: * Written informed consent to participate in the study must be obtained from the sub-ject prior to initiation of any study-mandated procedure * Subjects suffering from shoulder pain that do not fulfill the diagnostic criteria of Frozen Shoulder * Dutch or French speaking persons * Age ≥ 18 years * Contralateral shoulder of Frozen Shoulder subjects * Exclusion criteria * Subjects with posttraumatic or postsurgical stiff shoulder syndrome * History of trauma at the onset of symptoms * Subjects with rheumatologic or neurologic disease involving the shoulder * Subjects with cervical radiculopathy * Coagulation disorder or treatments with anticoagulants * Hypersensitivity to MRI contrast agent * Inability to understand the study procedures * Psychiatric illness * Pregnancy * Systematic yeast infections * Hypovolaemia * Infections at the injection site * Medical history of malignant hyperthermia, major conductin disorders, acute cardi-ac decompensation, shock conditions, convulsions