Background Food protein-induced allergic proctocolitis (FPIAP) is characterised by inflammation of the distal colon in response to one or more food proteins. It is a benign condition of bloody stools in a well-appearing infant, with usual onset between one and four weeks of age.
Objective Our objective was to examine the clinical properties of patients with FPIAP, tolerance development time as well as the risk factors that affect tolerance development.
Methods The clinical symptoms, offending factors, laboratory findings, methods used in the diagnosis and tolerance development for 77 patients followed in the Paediatric Allergy and Gastroenterology Clinics with the diagnosis of FPIAP during January 2010–January 2015 were examined in our retrospective cross-sectional study.
Results The starting age of the symptoms was 3.3 ± 4.7 months (0–36). Milk was found as the offending substance for 78% of the patients, milk and egg for 13% and egg for 5%. Mean tolerance development time of the patients was 14.7 ± 11.9 months (3–66 months). Tolerance developed before the age of one year in 40% of the patients. Tolerance developed between the age of 1–2 years in 27%, between the age of 2–3 years in 9% and after the age of 3 years in 5% of the patients.
Conclusions Smaller onset age and onset of symptoms during breastfeeding were found associated with early tolerance development. In the majority of the patients, FPIAP resolves before the age of one year, however in some of the patients this duration may be much longer.
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