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Comparison of iodine-125 plaque brachytherapy and gamma knife stereotactic radiosurgery treatment outcomes for uveal melanoma patients

  • Oncology
  • Published:
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Abstract

Purpose

To compare the efficacies of iodine-125 brachytherapy (IBT) and gamma knife stereotactic radiosurgery (GKRS) in the treatment of posterior uveal melanoma.

Methods

The demographic data and tumor characteristics at diagnosis of 201 patients treated with IBT and 52 patients treated with GKRS were recorded. The two treatments were then compared in terms of complications, local control, eye retention, metastasis, and overall survival rate.

Results

The median follow-up time was 56 months for the GKRS group and 45 months for the IBT group (p = 0.167). There were no significant differences in demographic data or tumor characteristics between the groups at diagnosis. Radiation retinopathy, radiation optic neuropathy, and neovascular glaucoma occurred at similar rates in both groups. However, radiation maculopathy and cataracts occurred more frequently in the GKRS group. The number of cases that have developed vision loss (worsening of best-corrected visual acuity on three or more lines on the Snellen chart) was significantly higher in the GKRS group (60%) compared to the IBT group (44%) (p = 0.048). Local control, metastasis, and 5-year overall survival rates were statistically similar in both groups.

Conclusions

GKRS can be preferred as an eye-sparing treatment option for posterior uveal melanoma in cases where brachytherapy cannot be used.

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Data availability

All data related to the study are included in the article.

Code availability

Not applicable.

Abbreviations

UM:

Uveal melanoma

IBT:

İOdine-125 brachytherapy

GKRS:

Gamma knife stereotactic radiosurgery

BCVA:

Best-corrected visual acuity

IOP:

Intraocular pressure

USG:

Ultrasonography

CT:

Computed tomography

PET:

Positron emission tomography

AJCC:

The American Joint Committee on Cancer

RR:

Radiation retinopathy

RON:

Radiation optic neuropathy

NVG:

Neovascular glaucoma

RM:

Radiation maculopathy

COMS:

The Collaborative Ocular Melanoma Study

SRT:

Stereotactic radiotherapy

LINAC:

Linear accelerator

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Correspondence to Ahmet Murat Sarici.

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The consent of the Ethics Committee of Cerrahpasa Medical Faculty, Istanbul University – Cerrahpasa, Turkey, was obtained prior to the study. All procedures performed in studies involving human participants were in accordance with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

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Guleser, U.Y., Sarici, A.M., Ucar, D. et al. Comparison of iodine-125 plaque brachytherapy and gamma knife stereotactic radiosurgery treatment outcomes for uveal melanoma patients. Graefes Arch Clin Exp Ophthalmol 260, 1337–1343 (2022). https://doi.org/10.1007/s00417-021-05472-x

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