35 Pterygium

672 Pterygium

Fig 34.3A: Result directly after treatment 1997, 3B: Result after long follow up 1999`(see Fig 34.1) A. Acute reactions 1 week after re-excision and 3 x 10 Gy surface doze with a strontium-90 epibulbar applicator. B. Result at 14 months.

Table 34.1: Results of brachytherapy in pterygium

Authors

Pts N

Dose Gy

Fractions N

Interval surgery/BT

Recurrence %

Complications %

Brenk (9)

1300

24-30

3

<1 day

2

1

Cooper (3)

272

30

3

Various

12

?

Mc Kenzie (6)

764

22

1

___

12

17

Wilder (10)

338

24

3

<1 day

2

1

Parayani (8)

825

60

6

<1 day

2

0

Fukushima (4)

393

30

3

<2 days

9

1

Nishimura (7)

490

30-40

4-5

1-3 days

12

2

The recurrence rate is only 2 - 12%, and the complication rate usually around only 1 - 2%. It has been reported by Mc Kenzie (6), however, to be as high as 17%.

12 References 1. Brenner DJ Merriam GR. Postoperative irradiation for pterygium: guidelines for optimal treatment. Int J Radiat Oncol Biol Phys 1994; 30 : 121-5. 2. Cameron ME et al. Pterygium throughout the world: Thomas CC (publ) Springfield 1965. 3. Cooper JS et al. Postoperative irradiation of pterygia: ten more yeras experience. Radiol 1978; 128 :153-6.