Inclusion Criteria:  Provision of signed and dated informed consent form Stated willingness to comply with all study procedures and availability for the duration of the study Female, aged (18-70) years Belongs to American Society of Anaesthesiologists physical status class II. Scheduled for breast cancer surgeries.  Exclusion Criteria:  Patient refusal. Local infection at the site of the block. Cardiac dysfunction (ejection fraction <45%). Preexisting neurological or psychiatric disease, communication difficulties, inability to use the patient-controlled analgesia (PCA) device. Allergy to one of the study drugs. Pregnancy. Coagulopathy (PC <60% and platelet count<100.000).