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Plesiotherapy is a radiation therapy modality in which a source of ionizing radiation is placed in contact with the exterior surface of the body. [1]

This is as distinguished from teletherapy in which radiation is projected by the source from a distance, from brachytherapy in which one or more sealed sources of radiation are placed inside the body, and from radiopharmaceutical therapy in which a source is introduced into the body, but that source is unsealed.[citation needed]

In contrast with teletherapy, where the distance between the source and the patient is exploited to produce a shallow fall-off of beam intensity with depth; in plesiotherapy, the source geometry is exploited to produce a dose fall-off that is steep, for treating superficial areas. [2] [3] [4]


  1. ^ "Glossary of Medical Physics and Radiology". Glossary. Medical Physics Publishing. Retrieved May 13, 2020. CS1 maint: discouraged parameter (link)
  2. ^ Mitchell, A.; Jacob, D.; Andreou, K.; Raben, A.; Chen, H.; Koprowski, C.; Mourtada, F. (2014). "SU-D-19A-07: Dosimetric Comparison of HDR Plesiotherapy and Electron Beam Therapy for Superficial Lesions". Medical Physics. 41 (6 Part 3): 111. Bibcode:2014MedPh..41..111M. doi:10.1118/1.4887870. ISSN 2473-4209.
  3. ^ Ray, Amitabh; Basu, Ayan; Aich, Ranen; Biswas, Litan; Pal, J (2010). "Plesiotherapy for non-melanoma skin cancer: Innovating to overcome!". Indian Journal of Dermatology. 55 (4): 363–6. doi:10.4103/0019-5154.74547. PMC 3051298. PMID 21430891.
  4. ^ Korzeniowski, MA; Crook, JM (30 Sep 2017). "Contemporary role of radiotherapy in the management of penile cancer". Translational Andrology and Urology. 6 (5): 855–867. doi:10.21037/tau.2017.07.02. PMC 5673811. PMID 29184783. Retrieved 14 May 2020. CS1 maint: discouraged parameter (link)