The material number is not marketed or distributed in the us.However, roche observed unacceptable, light staining with some ventana pd-l1 (sp142) on-market lots, during internal comparison studies.Light staining affects the borderline of positive versus negative test results.An on-going investigation has determined the root cause is related to variability in the selection of antibody concentration in raw materials, affecting specific ventana pd-l1 (sp142) assay lots made with the impacted raw materials.A notification has been sent to us customers informing them of the issue to immediately discontinue the use of and discard any remaining inventory of specific impacted lots and informing of an updated date of expiration for certain lots.The alleged samples were initially tested on 21 jan 2021 using lot g16831 and on 09 aug 2021 using lot g25464, respectively.The repeat run dates are unknown.To date, no harm is alleged.G16831 expiration date = 06/17/2022 g24564 expiration date = 09/13/2022 e1 facility name truncated due to character limit: (b)(6).
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