Risks

Bone marrow exams are generally safe procedures. Complications are rare but can include:

• Excessive bleeding, particularly in people with low numbers of a certain type of blood cell (platelets)
• Infection, generally of the skin at the site of the exam, especially in people with weakened immune systems
• Long-lasting discomfort at the bone marrow exam site
• Rarely, penetration of the breastbone (sternum) during sternal aspirations, which can cause heart or lung problems