TURKISH JOURNAL OF ONCOLOGY
2016 , Vol 31 , Num 1
Dosimetric Results of Postoperative Tomodirect Radiotherapy of Keloid on Ear Cartilage
Department of Radiation Oncology, Dicle University, Diyarbakır-Turkey
In radiotherapy following surgical excision of a keloid, radiation has been delivered using various
techniques, doses, and fractions. TomoDirect (TD) is a static delivery mode of TomoTherapy
(Accuray, Sunnyvale, CA, USA), allowing for the use of a fixed gantry angle in place of rotational
beam delivery. Described in the present report is the first instance of TD used for postoperative
radiotherapy of keloid scar. A 21-year-old woman presented with keloid scar that had developed
and gradually progressed on the left ear cartilage following a piercing 2 years prior. The patient underwent
TD radiotherapy with 2 tangential beams 33 hours after excision. Dose to planning target
volume (PTV) was 15 Gy in 3 fractions of 5.0 Gy daily, every other day, and V95 was 100%. Mean
dose of left parotid was 0.21 Gy, and maximum doses of brain and left lens were 0.34 Gy and 0.02
Gy, respectively. Optimal dose and technique for safe and effective postoperative keloid radiation
therapy are unclear and depend upon keloid area and size. Treatment of keloid on ear or other sites
with TD radiotherapy may be an optimal strategy.
Keywords :
TomoDirect; keloid scar; radiotherapy