lymphocytic leukaemia symptomssigns of childhood leukaemialymphoblastic leukaemia symptomschronic leukaemia symptomssymptoms of leukaemia in teenagerleukaemia relapse symptomsmyeloid leukaemia symptomsleukaemia nosebleedssymptoms of leukaemia in elderlyleukaemia petechiaeacute leukaemia symptomsleukaemia bruising