Vapocoolant Analgesia for Breast Lymphoscintigraphy

To learn if applying vapocoolant anesthetic spray ("Nüm") on the surface of the intended injection site will reduce the pain/anxiety associated with breast injections.

Primary Objectives: 1. Establish feasibility of topical vapocoolant in the setting of breast lymphoscintigraphy. 2. Demonstrate safety of topical vapocoolant in the setting of breast lymphoscintigraphy. Secondary Objectives: 1. To assess patient pain intensity associated with the performance of breast lymphoscintigraphy. 2. To evaluate the attitude from patients about supporting the continued offering of topical vapocoolant in the breast lymphoscintigraphy clinic.