TNPSC Thervupettagam
June 21 , 2025 12 hrs 0 min 16 0
  • The U.S. has successfully used a technique called step-and-shoot spot-scanning proton arc therapy (SPArc) to treat a patient’s adenoid cystic carcinoma (ACC) for the first time.
  • The SPArc works by targeting tumours with protons while sparing surrounding tissue.
  • The ACC is a relatively rare form of cancer that most commonly develops in the salivary glands or other regions of the head and neck.
  • But these technologies are very expensive one and are often suitable for a small patient population.

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