Impact of the Intraoperative Use of Amines in Breast Cancer Surgery on Tumor Recurrence

Condition(s) studied

Investigational drug(s) / intervention(s)

collection of health data from electronic medical records: collection of demographic data, key medical history, use of beta-blockers prior to surgery, anesthesia-related data (agents used to maintain anesthesia, regional anesthesia in addition to general anesthesia, intraoperative use of amines), postoperative morphine consumption, survival, and cancer recurrence within 5 years post-surgery

Study summary

Adrenergic receptors (alpha and beta) are expressed on breast cancer cells, and their stimulation has been shown in experimental studies to promote tumor proliferation and metastasis. Conversely, observational data suggest that beta-blockers may have a protective effect on cancer recurrence. During mastectomy, adrenergic agonists such as catecholamines (e.g., ephedrine, phenylephrine, norepinephrine) and other agents (e.g., clonidine) are frequently used intraoperatively to maintain hemodynamic stability, potentially activating these receptors. While some data suggest that perioperative adrenergic stimulation may influence tumor biology, the clinical impact on cancer recurrence remains unclear.

This retrospective exploratory study aims to evaluate whether the use of adrenergic agents during anesthesia for mastectomy influences tumor recurrence in breast cancer patients. Approximately 250 patients undergoing mastectomy over a 5-year period will be included. The study will assess the association between intraoperative exposure to adrenergic drugs and oncological outcomes, with the goal of better understanding the potential role of perioperative factors in cancer progression.

Eligibility

Primary outcome measure(s)

• cancer recurrence — 5 years post-surgery
  either local recurrence or metastases

Trial sites (1)

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