A phenotype workup is performed on a suspected ALL patient.The results come back indeterminate based on evaluation of all common ALL antigens.What is the most likely reason for this occurrence?

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A patient with acute bilineage leukemia has cells expressing both lymphoid and myeloid markers, which can lead to an indeterminate phenotype with common ALL antigens. This is a rare but possible scenario that should be considered when the standard ALL phenotype workup is inconclusive.

A Phenotype Workup Is Performed on a Suspected ALL Patient