Comparison of the leukemic versus non-leukemic ALK-negative groups revealed that the former group had an increased frequency of bone marrow involvement (50% vs. 14%, p = 0.04), absolute lymphocytosis (50% vs. 0%, p = 0.008), and thrombocytopenia (60% vs. 11%, p = 0.03). The gene discussed is ALK; the disease is Thrombocytopenia.