Cancer pain is a frecuent symptom in patients with primary or metastastic neoplasm and is a clinical challenge due to the difficulty in achieving adequate control despite multiple strategies, generating suffering and great impact on the quality of life.When there is a tumoral iinvasion to the thoracic wall, it generates progressive respiratory symptoms and severe pain that require multidisciplinary management, multimodal analgesic pharmacological management with different strategies, such as no opioids, strong opioids and opiooids rotation through different routes of administration, adjuvant analgesics, and added to these, the use of interventional options to achieve a good response.In most cases the patients have an advanced disease and a objective of palliative management then, the control of the symptoms and the quality of life are the priority.We report 2 cases of chest wall pain due to cancer refractory to pharmacological management that were managed with the use of phenol neurolysis of the spinal erector plane, achieving an adequate response.