AJ PHOTO / HOP AMERICAIN / SCIENCE PHOTO LIBRARY AJ PHOTO / HOP AMERICAIN / SCIENCE PHOTO LIBRARY
Cryotherapy. Dermatologist applying liquid nitrogen to a woman's face. This treatment is used to remove skin tags, lentigines (sun or age spots) and in the treatment of some types of thin, slow growing skin cancers. The liquid nitrogen freezes the cells, causing them to die.
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