Pancytopenia

Disease Description (Causes and Symptoms)

• Definition: A condition in which the numbers of red blood cells, white blood cells, and platelets produced in the bone marrow or maintained in the peripheral blood are all reduced (anemia + leukopenia + thrombocytopenia).
• Main pathophysiology:
  • Decreased production due to reduced bone marrow function (aplastic anemia, myelofibrosis, bone marrow suppression, etc.).
  • Impaired normal blood cell production due to bone marrow infiltration (leukemia, metastatic cancer, myelodysplastic syndrome, etc.).
  • Destruction in the periphery or storage in the spleen (hypersplenism).
  • Nutritional deficiencies (vitamin B12/folate deficiency) or infectious and immune mechanisms (autoimmunity, viral hepatitis, HIV, etc.).
• Common causes: Medications (anticancer drugs, some antibiotics, anticonvulsants, antithyroid drugs, etc.), viral/bacterial infections, autoimmune diseases, bone marrow diseases (aplastic anemia, MDS, leukemia), nutritional deficiencies, congenital diseases (e.g., Fanconi anemia), hypersplenism, etc.
• Main symptoms:
  • Fatigue, pallor, shortness of breath, palpitations, and headache due to anemia.
  • Fever, oral ulcers, and recurrent infections due to increased risk of infection.
  • Petechiae (bruising), purpura, frequent nosebleeds, and heavy menstrual bleeding due to an increased tendency to bleed.

Treatment Methods and Precautions

• Treat the underlying cause first: Discontinuation of the causative medication, treatment of infections, correction of nutritional deficiencies, etc.
• Standard treatments by bone marrow disease (examples):
  • Aplastic anemia (in severe cases): Hematopoietic stem cell transplantation (recommended for young patients when a suitable donor is available), immunosuppressive therapy (antithymocyte globulin [ATG] + cyclosporine).
  • Myelodysplastic syndrome (MDS), leukemia: Chemotherapy, targeted therapy, hematopoietic stem cell transplantation, etc., according to the diagnosis.
  • Drug-induced cases: Discontinuation of the causative drug and supportive treatment (blood transfusions, growth factors).
• Supportive treatment:
  • Blood transfusions (red blood cell transfusions for symptomatic anemia; platelet transfusions in cases of bleeding or very low platelet counts).
  • Growth factors: G-CSF (such as filgrastim) for neutropenia and EPO (erythropoiesis-stimulating agents) in specific cases.
  • In cases of infection, treatment with broad-spectrum antibiotics, antifungals, and antivirals, with inpatient management if necessary.
• Vaccination: Inactivated vaccines are recommended (especially in cases of splenectomy or immunosuppression). Live vaccines may be contraindicated in cases of immunosuppression.
• Lifestyle management and precautions:
  • Because of the risk of bleeding, use anticoagulants, antiplatelet agents, NSAIDs, and other medications that may worsen bleeding only after consulting a doctor.
  • Visit a medical institution immediately if a high-risk infection situation occurs (fever, chills, respiratory symptoms).
  • Restrict physical activity (avoid falls or trauma in cases of severe thrombocytopenia).
  • Reduce the risk of infection by avoiding alcohol, maintaining balanced nutrition, and practicing good hygiene.

Outpatient Visit Checklist (Including Preparation Materials and Sample Questions)

• Preparation/materials:
  • A list of all medications currently being taken (including prescription and nonprescription medications, herbal medicines, and supplements), including the medication name, dosage, and duration of use.
  • Previous blood test results (past CBC records if possible), recent hospital records, and prescriptions.
  • A record of when symptoms such as fever, bleeding, and fatigue began and how they have changed (a diary or photographs may be used).
  • Medical history (autoimmune diseases, malignant diseases, history of infections such as hepatitis and HIV), surgical history, and family history (bone marrow diseases, congenital abnormalities, etc.).
  • Information about recent travel, blood transfusions, and occupational exposures (chemicals, radiation, etc.).
• Information to provide to the doctor during the outpatient visit (including sample questions):
  • "Could any of the medications I have taken recently be related to reduced blood cell counts?" — Provide the medication list.
  • "Can you show me my previous CBC (blood test) results and the changes over time?" — Bringing previous test reports is recommended.
  • The criteria for contacting the doctor immediately if fever or bleeding occurs (e.g., a temperature of 38℃ or higher, platelet count thresholds, etc.).

Examples of General Questions to Ask the Doctor

• "What additional tests are needed to determine the cause of pancytopenia?"
• "When should I undergo a bone marrow examination, and what does the procedure involve and what are its risks?"
• "What is the prognosis, and which treatment option (immunosuppressive therapy vs. hematopoietic stem cell transplantation) is appropriate for me?"
• "What measures should I take to prevent infection and bleeding during treatment?"
• "Which medications, foods, or lifestyle habits should I avoid completely?"

Examples of Disease-Specific Questions

• If a medication-related cause is suspected: "Which of the medications I am taking (provide the list) are most likely to cause pancytopenia? What are the plans for alternative medications or discontinuation?"
• If a bone marrow disease is suspected: "How should the presence or absence of cellularity, fibrosis, and abnormal cells (dysplasia or malignancy) in the bone marrow examination results be interpreted? Which additional genetic tests (chromosomal or molecular tests) should be performed?"

(Depending on the doctor's recommendations, an emergency department visit or immediate hospitalization may be necessary. If emergency symptoms such as fever, difficulty breathing, or severe bleeding occur, receive emergency medical care immediately.)