Immune Thrombocytopenia in Children Less Than 1 Year of Age: A Single-institution 10-year ExperienceLo, Clara MD*; Wong, Wendy MD*; Glader, Bertil MD, PhD*,†; Jeng, Michael MD*Journal of Pediatric Hematology/Oncology: July 2013 - Volume 35 - Issue 5 - p 406–408 doi: 10.1097/MPH.0b013e3182580ab4 Clinical and Laboratory Observations Abstract Author Information Immune thrombocytopenia (ITP) in children less than one year of age is less well characterized compared to ITP in toddlers and school-age children. We performed a 10-year retrospective review of ITP patients in this age-cohort at our institution. Diagnosis and classification were made according to the 2009 International Working Group criteria. Fourteen infants were identified. Their bleeding scores were Grades 1 to 2 (79%), Grade 3 (22%), Grades 4 to 5 (0%). Eight patients received treatment with a 75% response rate. Three patients (21%) developed chronic ITP. These observations suggest that ITP in very young patients is similar to typical childhood ITP. Departments of *Pediatrics †Pathology, Stanford University School of Medicine, Palo Alto, CA The authors declare no conflict of interest. Reprints: Clara Lo, MD, Division of Pediatric Hematology/Oncology/Stem Cell Transplantation, 1000 Welch Road, Suite 300, Palo Alto, CA 94304 (e-mail: firstname.lastname@example.org). Received October 13, 2011 Accepted March 29, 2012 © 2013 by Lippincott Williams & Wilkins.