The objective of the study is to compare pain reduction and disability reduction in two groups of patients diagnosed with de Quervain syndrome who will undergo ultrasound-guided infiltrative treatment with corticosteroid as per normal clinical practice:
* the control group will subsequently be subjected to a standard treatment based on the European guidelines of the HANDGUIDE group, * the experimental group will subsequently carry out a program of eccentric exercises.
Patients of both sexes with a minimum age of 18 years;
Medical diagnosis of de Quervain syndrome assessed through orthopedic clinical examination e confirmation by ultrasound;
Signing of the informed consent and participation in the study.
Patients who are not self-sufficient or not able to understand and want;
Presence of other pathologies in the hand affected by de Quervain pathology, such as intersection syndrome, neuropathies, fractures, rhizoarthrosis, arthrosis of the radio-carpal or intercarpal joint, intercarpal instability, cervical radiculopathy, rheumatic or metabolic pathologies;
Pregnant or breastfeeding women.