Acquire intraoperative MMS measurements in vivo. After assessing this approach on excised tissues, MMS measurements will be aquired directly on the patient from the NMSC excision site. MMS data will be acquired on patients being treated for NMSC at the Austin Dermatologic Surgery Center, the surgical site for the dermatology practice of Seton/University of Texas Physicians group. Similar to the measurements on freshly excised tissues, MMS data will be acquired in a grid pattern on the excision site. The site will be blotted with gauze to remove residual blood prior to the measurement, and continuously blotted as needed until all measurements have been taken. The handheld probe of the MMS enables assessment of both the wound periphery and deeper layers of tissue to determine if any tumor is remaining. For this initial pilot study, we plan to take measurements on 10 patients (5 BCC, 5 SCC), along with corresponding normal tissue measurements.