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Updated: Jul 27, 2025
Integration of Wet and Dry Bench Processes Optimizes Targeted Next-generation Sequencing of Low-quality and Low-quantity Tumor Biopsies
Published on: April 11, 2016
Next-generation sequencing of a large uveal melanoma with whole genome doubling and a
Tessnim R Ahmad1, Melike Pekmezci1,2,3, Michele M Bloomer1,2
1Department of Ophthalmology, Wayne & Gladys Valley Center for Vision, University of California San Francisco, San Francisco, CA, USA.
Purpose:
To report a large uveal melanoma with extra-scleral extension which underwent spontaneous infarction and its unique molecular signature profile.
Observations:
An 81-year-old female presented with a blind, painful eye. Intraocular pressure was 48 mm Hg. There was a large subconjunctival melanotic mass overlying a choroidal melanoma with anterior extension involving the ciliary body and the iridocorneal angle and iris. Ultrasonography confirmed a dome-shaped anterior cilio-choroidal mass with extra-scleral extension. The patient underwent enucleation and pathologic evaluation confirmed cilio-choroidal melanoma. The posterior half of the tumor involving the ciliary body and the extra-scleral component were spontaneously infarcted and were composed of large melanophages. Next-generation sequencing demonstrated a splice site mutation in PBRM1 and whole-genome doubling in addition to a GNAQ hotspot mutation, chromosome 3 loss and 8q gain.
Conclusions And Importance:
This case of a large, auto-infarcted uveal melanoma demonstrates a PBRM1 mutation and whole-genome doubling.
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