Among three bodily fluid samples tested, two cerebrospinal fluid samples showed evidence of tumour infiltration, one with T-cell acute lymphoblastic leukaemia, and another infiltrated with acute myeloid leukaemia; a separate (third) pleural fluid sample showed infiltration by follicular lymphoma, confirmed with CD10 expression and other markers suggesting B-cell maturity. The gene discussed is MME; the disease is follicular lymphoma.