What are the indications, contraindications, and procedural steps for performing a bone marrow aspiration?

Bone Marrow Aspiration: Indications, Contraindications, and Procedural Steps

Direct Answer

Bone marrow aspiration should be performed when you need cytological assessment for suspected hematologic malignancies (especially acute leukemia), unexplained cytopenias, staging of lymphomas, or evaluation of fever of unknown origin, using the posterior iliac crest as the preferred site with adequate local anesthesia. 1, 2

Key Indications

The most common and important indications for bone marrow aspiration include:

Primary Indications (in descending order of frequency):

• Diagnosis and management of acute leukemia (22.2% of cases) - this is the single most common indication 3
• Staging for lymphoma (15.2%) 3
• Evaluation of pancytopenia (11.9%) 3
• Thrombocytopenia workup (9.5%) 3
• Investigation of unexplained anemia (8.3%) 3
• Fever of unknown origin (7.2%) 3
• Lymphadenopathy and hepatosplenomegaly 3

Additional Diagnostic Scenarios:

• Suspected myeloproliferative neoplasms
• Immunoglobulin disorders
• Storage diseases
• Metabolic bone diseases
• Monitoring treatment response to chemotherapy or bone marrow transplantation 4, 5

Critical point: Bone marrow aspiration alone has limited diagnostic utility and should routinely be performed together with trephine biopsy, as it's impossible to predict which patients will have diagnostic aspirates versus biopsies 4.

Contraindications

While the evidence provided doesn't explicitly detail absolute contraindications, the following are standard considerations:

Relative Contraindications:

• Severe coagulopathy (should be corrected first)
• Severe thrombocytopenia (platelet transfusion may be needed)
• Local infection at the aspiration site
• Hemodynamic instability

Important safety note: Sternal aspiration carries a rare but serious risk of death from cardiac tamponade, making the posterior iliac crest the strongly preferred site 5.

Procedural Steps

Pre-Procedure Requirements

The treating clinician must provide or ensure pathologist access to: 1

• Patient demographics (age, sex, ethnicity)
• History of hematologic disorders or predisposing conditions
• Prior malignancy history
• Exposure to cytotoxic therapy, immunotherapy, radiotherapy, or toxic substances
• Recent growth factor therapy, transfusions, or medications that might obscure findings
• Family history of hematologic disorders
• Physical examination findings, especially neurologic findings and organomegaly
• Recent CBC counts and peripheral blood smear review

Site Selection

Posterior iliac crest is the preferred site for patient comfort and safety 2, 5. The sternum is an alternative but carries higher risk.

Anesthesia

Adequate local anesthesia is essential to minimize patient discomfort 2, 5. Recent advances suggest fluoroscope or ultrasound guidance combined with anesthesia improves tolerability 6.

Specimen Collection Protocol

The following specimens should be obtained: 1

1. Fresh bone marrow aspirate - mandatory for all suspected acute leukemia cases
2. Bone marrow aspirate smears for morphologic evaluation
3. Trephine core biopsy - should be evaluated in conjunction with aspirates
4. Trephine touch preparations and/or marrow clots if available

If aspirate is inadequate ("dry tap"): 1

• Prepare touch imprint preparations from core biopsy
• Submit additional core biopsy unfixed in tissue culture medium for disaggregation for flow cytometry and genetic studies
• Use peripheral blood if sufficient blasts are present

Essential Ancillary Studies

Beyond morphologic assessment, you must obtain: 1

• Conventional cytogenetic analysis (karyotype) - cannot be replaced by molecular testing
• Flow cytometry immunophenotyping - panel must distinguish AML (including APL), early T-ALL, B-ALL, and acute leukemia of ambiguous lineage
• Molecular genetic and/or FISH testing - as appropriate
• Cytochemical studies - may assist in AML diagnosis and classification 1

Alternative if insufficient aspirate material: Immunohistochemical studies on core biopsy can provide limited immunophenotyping 1.

Specimen Processing

Once obtained: 2

• Make films of aspirated marrow and crushed particles
• Label all specimens immediately
• Allow films to dry thoroughly
• Fix and stain (minimum: Romanowsky stain and Perls' stain)
• Apply coverslip
• Assess systematically using low, intermediate, then high power objectives
• Perform differential count

Specimen Preservation

Consider cryopreserving cells or nucleic acid, or using formalin-fixed, non-decalcified paraffin-embedded tissue for future studies 1.

Common Pitfalls to Avoid

1. Performing aspiration without trephine biopsy - both should be done routinely together 4
2. Inadequate clinical information provided to pathologist - this significantly impairs diagnostic accuracy 1
3. Failing to obtain sufficient material for ancillary studies - particularly problematic in acute leukemia where flow cytometry and cytogenetics are mandatory 1
4. Using sternal site unnecessarily - posterior iliac crest is safer 5
5. Inadequate local anesthesia - leads to poor patient experience and potential movement during procedure 2, 5
6. Not having same physician interpret aspirate and biopsy - or failing to correlate interpretations if done by different physicians 1

Quality Considerations

The procedure should be performed by trained individuals following standard operating procedures who understand indications, contraindications, and hazards 2. Recent advances in needle technology with specially sharpened cutting edges and core-securing devices have improved specimen quality and reduced patient discomfort 5.

Complications (pain, bleeding, infection) are rare when performed at the posterior iliac crest with proper technique 5, 7.