Is there a tradeoff in using modified high tangent field radiation for treating an undissected node-positive axilla?

Introduction: Recent data are changing axillary management in patients with 1 to 2 positive sentinel nodes. The proposed omission of completion axillary node dissection calls into question the need for axillary nodal irradiation. This study evaluates the difference in dose to the lung and heart and risk of radiation pneumonitis (RP) for patients treated with standard tangent fields (STF) compared with modified high tangent fields (MHTF).