This supplemental report is being submitted to provide additional information.The subject device was not returned to olympus medical systems corp.(omsc) for evaluation but returned to olympus korea.The evaluation confirmed that crack on the light guide (lg) lens, a brown part inside the lg lens, and traces of fluid invasion.Omsc surmised that there was a gap in the adhesive around the lg lens, and fluid entered through around the lg lens.Omsc reviewed the manufacture history (dhr) of the subject device and confirmed no irregularity.The exact cause of the reported phenomenon could not be conclusively determined.However, based upon the past similar cases, there was the possibility that the reported phenomenon was attributed to physical stress, chemical stress, storage environment (such as direct sunlight, high temperature, high humidity, environment exposed to x-rays / ultraviolet rays, etc.), or aging deterioration.
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