Long-term results of intensity-modulated radiotherapy concomitant with chemotherapy for hypopharyngeal carcinoma aimed at laryngeal preservation

Table 2 Doses to targets and critical organs in larynx-preservation treatment of hypopharyngeal carcinoma

	Mean (Gy)	Range (Gy)	Dose (Gy)/no. **
PTV-1*	76.2	70.1--82.7	2.12/33-37
PTV-2*	60.6	54.7--67.2	1.75-1.8/34-37
PTV-3*	51.3	48.6-57.6	1.8/27-32
Spinal Cord§	49.1	39.3--60.6
Spinal Cord†	44.5	36.2--50.0
Parotid Gland, ipsilateral	34.1	23.3--46.6
Parotid Gland, contralateral	30.5	18.7--44.7

* PTV-1, planning target volume of gross tumor; PTV-2, planning target volume of clinical target volume; PTV-3, planning target volume of bilateral supraclavicular fossa.
§Maximal dose to the spinal cord.
†Five percent volume dose to the spinal cord.
** Daily dose and fraction numbers in IMRT treatment.

ISSN: 1471-2407