Paeds · haematology-oncology-and-transfusion
Bleeding child: diagnostic approach
Also known as Bleeding child · Bruising child workup · Coagulation screen interpretation in children · Bleeding assessment tool · Platelet versus coagulation bleeding
Fellowship guide to the systematic diagnostic approach to the child who presents with bleeding or bruising. Covers recognising normal childhood bruising, quantifying the bleeding history with a bleeding assessment tool, and splitting the presentation into platelet-type (primary hemostasis) and coagulation-type (secondary hemostasis) bleeding, then resolving it with the full blood count, blood film, prothrombin time, activated partial thromboplastin time and targeted factor and Von Willebrand disease assays.
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Target exams
Red flags
- Petechiae and bruising in a non-mobile infant, which is non-accidental injury until proven otherwise
- Bruising in an ill child with cytopenias, blasts on the film, or hepatosplenomegaly suggesting leukaemia or marrow failure
- A painful swollen joint or muscle haematoma in a boy suggesting haemarthrosis from haemophilia
- Severe headache, vomiting or altered consciousness with thrombocytopenia suggesting intracranial haemorrhage
- Bruising with prolonged fever, pallor and systemic illness suggesting disseminated intravascular coagulation or sepsis
- Neonatal bleeding within days of birth without vitamin K prophylaxis suggesting vitamin K deficiency bleeding
- Patterned, symmetric bruises or bruises away from bony prominences raising non-accidental injury
Life stages
Care settings
Clinical exam formats
Board mappings
- Distinguishes platelet-type from coagulation-type bleeding from the history
- Orders a full blood count, film, prothrombin time and activated partial thromboplastin time as first-line tests
- Recognises isolated severe thrombocytopenia in a well child as probable immune thrombocytopenia
- Applies a structured diagnostic algorithm guided by the bleeding pattern and screening tests
- Selects and interprets Von Willebrand disease and factor assays
- Interprets coagulation tests against age-specific paediatric reference ranges
- Platelet versus coagulation bleeding patterns
- First-line laboratory evaluation of the bleeding child
- When to suspect non-accidental injury in a child with bruising
- History-taking and quantification of bleeding using a bleeding assessment tool
- Communication of a stepwise diagnostic plan to the family
- Counselling about Von Willebrand disease or haemophilia and family screening
- Level 1: Recognises normal versus abnormal bleeding in a child
- Level 2: Orders and interprets the initial coagulation screen
- Level 3: Selects confirmatory tests for inherited bleeding disorders
- Primary versus secondary hemostasis and their bleeding patterns
- Causes of isolated thrombocytopenia in children
- Interpretation of prothrombin time and activated partial thromboplastin time
- History-taking from a child with recurrent epistaxis and bruising
- Structured examination of a child with petechiae and bruising
- Communication of a bleeding-disorder diagnostic pathway
- Diagnostic approach to the child with abnormal bleeding
- Distinguishing immune thrombocytopenia from leukaemia
- Indications for Von Willebrand disease and factor assays
- Systematic evaluation of suspected bleeding disorders in children
- Appropriate selection and timing of coagulation tests
- Recognition of bleeding emergencies and non-accidental injury
- Canadian approach to the bleeding child workup
- Age-specific interpretation of paediatric coagulation studies
- Bleeding assessment tools in paediatric practice
Overview & Definition
A child bleeds abnormally when the bleeding is out of proportion to injury, recurs without obvious trauma, sits at an unusual site, or follows a recognisable inherited pattern. The diagnostic task is not to list every cause at once, but to move through three ordered questions. Is the bleeding actually abnormal, or is it normal childhood bruising? Does the pattern point to a platelet problem or a clotting-factor problem? And which specific disorder is responsible? Answering these in sequence turns a scattergun panel of tests into a focused, safe workup. [1]
The first question is the hardest and the most often skipped. Normal children bruise their shins, have occasional nosebleeds, and cut themselves. Abnormal bleeding is defined by its site, severity, duration, and disproportion to injury, and it is best quantified with a validated bleeding assessment tool rather than a clinician's impression. The second question is settled by the pattern of bleeding and a small set of first-line tests. A child with petechiae, nosebleeds, and heavy periods has a primary-hemostasis (platelet-type) problem; a boy with a swollen knee and a deep muscle haematoma has a secondary-hemostasis (coagulation-type) problem. [1]
The third question is resolved by targeted confirmatory assays guided by the screening tests. A prolonged activated partial thromboplastin time with deep bleeding demands factor VIII and IX assays, while a normal screen with convincing mucocutaneous bleeding demands Von Willebrand disease testing and a platelet function workup. Holding these three questions in order is what separates a confident diagnostician from one who orders everything and waits. [2]
References10ShowHide
- [1]van Ommen CH, Peters M The bleeding child. Part I: primary hemostatic disorders. Eur J Pediatr, 2012.PMID 21800040
- [2]van Herrewegen F, Meijers JC, Peters M, et al Clinical practice: the bleeding child. Part II: disorders of secondary hemostasis and fibrinolysis. Eur J Pediatr, 2012.PMID 21922352
- [3]Neunert C, Terrell DR, Arnold DM, et al American Society of Hematology 2019 guidelines for immune thrombocytopenia. Blood Adv, 2019.PMID 31794604
- [4]Neunert CE, Arnold DM, Grace RF, et al The 2022 review of the 2019 American Society of Hematology guidelines on immune thrombocytopenia. Blood Adv, 2024.PMID 38608258
- [5]James PD, Connell NT, Ameer B, et al ASH ISTH NHF WFH 2021 guidelines on the diagnosis of von Willebrand disease. Blood Adv, 2021.PMID 33570651
- [6]Bidlingmaier C, Grote V, Budde U, et al Prospective evaluation of a pediatric bleeding questionnaire and the ISTH bleeding assessment tool in children and parents in routine clinical practice. J Thromb Haemost, 2012.PMID 22578063
- [7]Rodeghiero F, Tosetto A, Abshire T, et al ISTH/SSC bleeding assessment tool: a standardized questionnaire and a proposal for a new bleeding score for inherited bleeding disorders. J Thromb Haemost, 2010.PMID 20626619
- [8]Rodeghiero F, Michel M, Gernsheimer T, et al Standardization of bleeding assessment in immune thrombocytopenia: report from the International Working Group. Blood, 2013.PMID 23361904
- [9]Andrew M, Vegh P, Johnston M, et al Maturation of the hemostatic system during childhood. Blood, 1992.PMID 1391957
- [10]Tosetto A, Eikenboom J Clinical and laboratory diagnosis of von Willebrand disease. Haematologica, 2026.PMID 41496702