Study objectives: To describe the presumptive diagnoses in an unselect
ed, ambulatory, pediatric population complaining of rectal bleeding; t
o determine how often those diagnoses changed with follow-up; and to d
etermine how often the bleeding represented an acutely life-threatenin
g condition. Design: Retrospective case series. Setting: Urban, tertia
ry care pediatric emergency department. Participants: One hundred four
patients with 109 visits with a chief complaint of blood in the stool
. Interventions: None. Main results: Follow-up was available on 95 of
109 visits (87.1%), with a mean duration of 7.5 months. A specific pre
sumptive etiology was established for 73 of 109 patients (67%) at the
initial ED visit and for 74 of 95 patients (77%) at follow-up. The eti
ologies varied markedly by age. Four patients (4.2%; 95% confidence in
terval, 0.2% to 8.2%) presented with a life-threatening condition (req
uiring an RBC transfusion or operative intervention): intussusception
(three patients) and Meckel's diverticulum (one patient). Concordance
between the ED diagnosis and the follow-up diagnosis was 81%. Conclusi
on: A complaint of rectal bleeding is typically not life threatening i
n children. Emergency physicians normally are able to establish a pres
umptive diagnosis, which usually remains the same with follow-up.