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Updated: May 12, 2026
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Implantation and Evaluation of Melanoma in the Murine Choroid via Optical Coherence Tomography
Published on: December 2, 2022
Diffusion-weighted imaging of ocular melanoma.
Katharina Erb-Eigner1, Gregor Willerding, Matthias Taupitz
1Department of Radiology, Charité - Universitätsmedizin Berlin, Campus Benjamin Franklin, 12203 Berlin, Germany. katharina.erb@charite.de
Investigative Radiology
|April 26, 2013
Summary
Diffusion-weighted imaging (DWI) reveals ocular melanoma has restricted diffusion, unlike retinal detachment. This MRI technique aids in distinguishing these conditions, crucial for diagnosing ocular masses.
Area of Science:
- Ophthalmology
- Radiology
- Oncology
Background:
- Diffusion-weighted imaging (DWI) characterizes tissue cellularity.
- Ocular melanoma, a malignant tumor, is hypothesized to exhibit diffusion restriction.
- Differentiating ocular melanoma from retinal detachment is clinically important.
Purpose of the Study:
- To investigate diffusion restriction in ocular melanoma using DWI.
- To assess the utility of DWI in differentiating ocular melanoma from retinal detachment.
- To compare apparent diffusion coefficient (ADC) values between ocular melanoma and retinal detachment.
Main Methods:
- Prospective study of 44 patients undergoing ocular MRI with DWI.
- Region-of-interest analysis to calculate ADC for ocular melanoma and retinal detachment.
- Qualitative scoring of DWI image quality by two readers.
Main Results:
- Ocular melanomas demonstrated marked diffusion restriction (mean ADC: 891 × 10 mm/s).
- Retinal detachments had significantly higher mean ADC values (1986 × 10 mm/s; P < 0.001).
- DWI was diagnostic in 40 of 44 patients.
Conclusions:
- Ocular melanoma exhibits significant diffusion restriction (ADC < 1000 mm/s), consistent with other malignancies.
- DWI is effective in differentiating ocular tumors from retinal detachment.
- DWI should be incorporated into ocular MRI protocols for suspected ocular masses.
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