Background. - Hypertension may be associated with intussusception. Case report. - An 8-month-old infant showed the following symptoms: lethargy, vomiting and hypertension. Abdominal ultrasound suggested the diagnosis of intussusception, which was confirmed by barium enema. The hypertension resolved after the intussusception was reduced. Conclusion. - Intussusception should be considered a diagnostic possibility in infants who show a history of vomiting and in whom lethargy and systematic hypertensin are noted. This case re-affirms the diagnostic usefulness of abdominal ultrasonography. (C) 1999 Elsevier, Paris.