Journal of AAPOS : the official publication of the American Association for Pediatric Ophthalmology and Strabismus · 2004
Ocular motility disturbances after episcleral plaque brachytherapy for uveal melanoma.
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Sener Emin Cumhur, Kiratli Hayyam, Gedik Sansal, Sanac Ali Sefik
Аннотация
OBJECTIVE: To evaluate contributions of various factors in the development of strabismus after iodine-125 brachytherapy for uveal melanoma.
METHODS: Twenty consecutive patients who underwent episcleral plaque brachytherapy for uveal melanoma underwent a full orthoptic examination before and after the surgery. Iodine-125 seeds at 5-mCi strengths were used with a mean total dose of 10.400 cGy toward the tumor apex.
RESULTS: Average follow-up time was 25.4 months (range, 14 to 40). At 12 months all tumors showed regression, 9 patients had visual acuity of 20/200 or better, and 4 patients had ambulatory vision. After tumor treatment, 8 patients were orthophoric, 9 patients developed exotropia, 1 patient became hypertropic, 2 patients developed exotropia and hypertropia. Of 2 patients who developed significant diplopia, 1 received 10 U botulinum-toxin A injection (Botox, Allergan, Irvine, CA) for exotropia, and the other was managed with superior rectus advancement and superior oblique tenectomy for surgery-induced iatrogenic Brown's syndrome and slipped superior rectus muscle.
CONCLUSION: Extensive mechanical injury, possible ionizing radiation of the plaques, and low visual acuity may cause strabismus after episcleral plaque brachytherapy. Diplopia and cosmesis could be improved with Botox injection or strabismus surgery.
METHODS: Twenty consecutive patients who underwent episcleral plaque brachytherapy for uveal melanoma underwent a full orthoptic examination before and after the surgery. Iodine-125 seeds at 5-mCi strengths were used with a mean total dose of 10.400 cGy toward the tumor apex.
RESULTS: Average follow-up time was 25.4 months (range, 14 to 40). At 12 months all tumors showed regression, 9 patients had visual acuity of 20/200 or better, and 4 patients had ambulatory vision. After tumor treatment, 8 patients were orthophoric, 9 patients developed exotropia, 1 patient became hypertropic, 2 patients developed exotropia and hypertropia. Of 2 patients who developed significant diplopia, 1 received 10 U botulinum-toxin A injection (Botox, Allergan, Irvine, CA) for exotropia, and the other was managed with superior rectus advancement and superior oblique tenectomy for surgery-induced iatrogenic Brown's syndrome and slipped superior rectus muscle.
CONCLUSION: Extensive mechanical injury, possible ionizing radiation of the plaques, and low visual acuity may cause strabismus after episcleral plaque brachytherapy. Diplopia and cosmesis could be improved with Botox injection or strabismus surgery.