Measurement of bony Orbital Volume with Computed Tomography (CT) in Healthy Eyes of Saudi Children

Elkhamary, Sahar; Sallam, Abdullah Ali; Souru, Ches; Kh, Rajiv; ekar,

doi:10.15406/jcpcr.2016.06.00215

Cited by 3 publications

(1 citation statement)

References 23 publications

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“…Reconstruction software (3D) utilizing MRI scans may offer a reasonable solution to measure orbital volume in living patients. 18,19 Several groups have validated measurements using a semi-automatic software segmentation method with good results. 20 Other future directions include controlling for prosthesis effect and orbital implant migration over time.…”

Section: Discussionmentioning

confidence: 99%

Longitudinal Comparison of Orbital Volumes from Enucleated Eyes with Hydroxyapatite Orbital Implant in Unilateral Retinoblastoma Patients

Kruglov,

Laplant,

Dryden

et al. 2023

Ophthalmic Plastic &Amp; Reconstructive Surgery

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Purpose: To compare the orbital volume between enucleated and contralateral, uninvolved orbits over a 5-year period in patients with unilateral retinoblastoma who underwent enucleation with hydroxyapatite (HA) implant placement by a single surgeon. Methods: A retrospective review was performed on the clinical records and radiographic images of unilateral retinoblastoma patients who underwent enucleation with primary HA implantation from 2003 to 2020 at a single institution. Bilateral orbital volume measurements were taken from the initial postoperative MRI scan and again at 1- and 5-years postenucleation. The main outcome measure was the longitudinal change in volume difference (∆𝑉). The implant size, age at enucleation, and sex were also evaluated. A linear mixed-effect model was used for analysis. Results: A total of 124 patients (73 males) with HA implants following enucleation were included. Overall, the unaffected orbit trended toward having a greater volume compared with the enucleated orbit, but this was not statistically significant (β = 0.003; p = 0.122). The mean age at enucleation was 2.4 years. The median time between enucleation and the initial, 1-year, and 5-year postoperative MRIs was 6 months, 17 months, and 55 months, respectively. There was no statistical correlation between age at enucleation, gender, implant size, or orbital volume at any time points (p > 0.05). Conclusions: Patients treated with enucleation and primary HA implant placement for unilateral retinoblastoma did not display significant asymmetry in orbital volume on 5-year postenucleation MRIs, suggesting that HA implants promote orbital growth comparable to a nonenucleated orbit in the pediatric population.

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Section: Discussionmentioning

confidence: 99%