Hemostasis Today
NewsFeed
Headlines Hematology Health Medicine VTE ASH Plasma Donation
March, 2026
March 2026
M T W T F S S
 1
2345678
9101112131415
16171819202122
23242526272829
3031  
Nishant Rajendra Tiwari: Stepwise Approach to New-Onset Pancytopenia 
Nishant Rajendra Tiwari/X
Dec 11, 2025, 12:10

Nishant Rajendra Tiwari: Stepwise Approach to New-Onset Pancytopenia 

Nishant Rajendra Tiwari, Hematology-Oncology Fellow at OU Health Stephenson Cancer Center, posted on X:

”Stepwise Approach to New-Onset Pancytopenia
*Educational post – not medical advice.*

  1. Review baseline blood counts → Acute vs chronic?
  2. Evaluate for serious/critical conditions:
    – Acute leukemia? Other aggressive hematological malignancies? *(Peripheral smear, flow cytometry, bone marrow biopsy as indicated)*
    – Neutropenic fever? Treat per algorithm if present!
  3. Transfusions needed? Severe anemia or thrombocytopenia?
  4. Any signs of DIC or TLS? *(PT/aPTT, fibrinogen, LDH, uric acid, Phosphorus)*
  5. Medication review — always check latest literature for drug associations!
  6. Investigate secondary causes (clinically guided):
    – Nutritional: B12, folate, thiamine, copper, zinc
    – Viral: HIV, Hepatitis, CMV, EBV, HHV-6, VZV, Parvo B19, HSV1/2
    – Fungal: Disseminated histoplasmosis
    – Bacterial: Typhoid, brucellosis, TB
    – Parasitic: Leishmaniasis, malaria
    – Immune: SLE, RA, Evans syndrome
    – Endocrine: TSH, Free T4, AM cortisol, ACTH *(rule out panhypopituitarism)*
  7. Imaging? Look for lymphadenopathy, splenomegaly, liver cirrhosis, malignancy etc.
    – I try to get a CT chest/abdomen/pelvis with contrast if renal function allows!
  8. When to do bone marrow biopsy?
    – Suspected hematologic malignancy
    – Unrevealing workup
    – Planning growth factor therapy (G-CSF, TPO mimetics)
  9. Radiation? Heavy metals? Environmental toxins? Excess alcohol?
  10. Syndromic features of inherited bone marrow failure syndromes (IBMFS)?
    – Aplastic anemia morphology? Bone marrow exam clues?
    – Young patients or syndromic features? → Consider germline testing!
  11. Rare but notable causes (investigate as indicated):
    – PNH
    – Post-transplant LPD
    – Glycogen/lysosomal storage disorders
    – Primary HLH *(especially in kids)*
    – Sarcoidosis
    – Primary immunodeficiencies
  • Key Clinical Pearls:
    – Acute pancytopenia in a healthy adult = medical emergency → **always rule out acute leukemia**!
    – Microcytic anemia + pancytopenia? Think copper deficiency or severe malnutrition (B12/folate + iron deficiency!)
    – Secondary HLH is more common in adults than primary HLH.

This is a ‘framework’, not the full DDx — the differential is too vast for one tweet! Happy to hear any feedback for it’s improvement.”

Nishant Rajendra Tiwari

Stay updated with Hemostasis Today.

anemia Blood Bone Marrow Biopsy Evans Syndrome Health Hematology Hemostasis Today Leukemia Medicine Nishant Rajendra Tiwari Pancytopenia Peripheral Smear splenomegaly thrombocytopenia transfusion
NewsFeed