How practitioners would approach a thrombocytopenia workup

A thorough thrombocytopenia workup can be key to uncovering subtle underlying causes of low platelet counts.

In this case, a 45-year-old man with mild thrombocytopenia and slightly elevated liver enzymes presented without bleeding symptoms, autoimmune history, or viral risk factors. With initial labs and infection screening unrevealing, practitioners on Healthcasts weighed in on next steps,  from imaging and autoimmune testing to possible bone marrow evaluation.

What workups would you recommend? Log in or sign up to leave a comment and see the Consensus.

Post:

• Moderate obesity
• DM 2 for which he is on metformin.
• HTN, well controlled on an ARB.

• WBC 8.7
• Hemoglobin 13.8
• PLTs 95. Re-run in a citrate tube with a similar PLT count of 92.

Workup includes the following:

• Peripheral blood smears confirm mild thrombocytopenia and no clumping.
• Neg HIV and Hep C.
• Due to mild dyspeptic symptoms, H Pylori stool testing was ordered and negative.
• Normal B12, folate, and copper levels.
• CMP shows a mild increase in LFTs with AST and ALT 2x ULN.

Questions

 Comments

Key takeaways on next steps for a thrombocytopenia workup:

• Begin with hepatic and systemic causes
  It is recommended to start by assessing liver function and imaging for underlying hepatic or splenic issues, paired with lifestyle guidance like alcohol cessation and weight management.
  
• Screen broadly for autoimmune and infectious triggers
  Autoimmune panels, hepatitis testing, thyroid studies, and B12 levels are key to ruling out reversible causes—alongside medication review and patient history.
  
• Reserve bone marrow biopsy for select cases
  Most practitioners suggest avoiding invasive testing unless platelets worsen, symptoms appear, or initial workups are inconclusive, using shared decision-making to guide timing.
  

Family Practice

"I would explore the elevated liver function, as liver disease can cause mild thrombocytopenia. I would order a liver ultrasound and consider a fibroscan of the liver with repeat liver enzymes. Recommend weight loss and zero alcohol consumption."

Internal Medicine

"Liver imaging and autoimmune panel to begin with. Stopping his meds and reevaluating. Rule out any infections or thyroid disease, or B-12 deficiency. Depending on his symptoms, a bone marrow biopsy would be the last resort."

Oncology/Hematology

"I would order an autoimmune workup, hepatitis testing, as well as abdominal imaging to assess the liver and spleen. What do prior labs show (i.e., is this new-onset thrombocytopenia or persistent)? 

If this workup is negative, I would monitor and observe the platelet trend and order a bone marrow biopsy if worsening or if the patient has bleeding manifestations. Alternatively, if the patient is very nervous and eager for an explanation/rule out, you could order a bone marrow biopsy now (after the above workup). Would discuss risks/benefits and do shared decision making."

Internal Medicine

"There are various possibilities in this situation. A trained hematologist can manually count the platelets and monitor them periodically. Chronic ITP, hereditary ITP, infections, metabolic and nutritional conditions, autoimmune rheumatological conditions, malignancies, including MDS, are some of the important conditions.

Progression of the condition, any symptoms, and regular PE by a trained hematologist should target the needed investigations, including BMB."

Oncology/Hematology

"I’d order autoimmune screening and platelet antibody tests to explore immune-related causes. I’d also do abdominal imaging to evaluate the liver and spleen for structural or chronic disease contributing to low platelets. Meanwhile, I’d track his counts over time before considering bone marrow evaluation."

What next steps would you suggest for this patient? Review the full case on Healthcasts and leave a comment to help your peers.