Serratus Posterior Superior Intercostal Plane Block in Robotic-Assisted Thymectomy

Inclusion Criteria: * Patients affected by thymoma, thymic hyperplasia, or thymic pathologies (cysts, teratomas) who have given informed consent to the study. Exclusion Criteria: * Patients who refuse to participate in the study by not signing the informed consent; * Patients with myasthenia gravis, severe obesity (BMI \> 35), history of OSAS with or without CPAP; * Patients belonging to ASA classes \> 3, according to the system developed by the American Society of Anesthesiologists; * Patients unable to understand the functioning of the NPR Scale or the PCA device that will be used for postoperative analgesia; * Patients with allergies to analgesic and/or anesthetic drugs; * Patients on anticoagulant therapy; * Patients with a history of chronic pain; * Patients with an infection at the site where SPSIPB will be performed; * Patients who have had previous thoracic surgery and/or thoracic trauma with rib fractures on the side of the surgery; * Patients with chest deformities and/or neuromuscular diseases that interfere with normal ventilatory function. Additionally, patients whose surgery is intraoperatively converted to sternotomy thymectomy will be excluded post-hoc from the study.