[Leukemia revealed by polyarthritis]. / Polyarthrites révélatrices d'une leucémie.

INTRODUCTION: Ostéoarticular manifestation whose reveal leukaemia in 4% of the cases, regress completely with haematological remission. EXEGESIS: We report two observations of leukaemia revealed by polyarthritis. A 22-year-old woman has presented a polyarthritis 8 months before de diagnosis of acute leukaemia. A 34 years old men, has presented one month before admission an acute polyarthritis revealing chronic myeloid leukaemia. CONCLUSION: Polyarthritis may reveal an acute or chronic leukaemia. Systematic blood analysis can make a difference in diagnosis of recent polyarthritis.