Hemochromatosis

Disease Description (Causes and Symptoms)

• Definition and pathophysiology: A platelet disorder is a condition in which the process of hemostasis and thrombus formation is impaired due to abnormalities in the number of platelets (decreased: thrombocytopenia / increased: thrombocytosis) or their function (functional platelet disorders). When platelets are deficient or their function is reduced, a person is primarily susceptible to primary hemostatic bleeding (localized bleeding), such as petechiae and mucosal bleeding. When platelets are excessive or dysfunctional, the risk of thrombosis and embolism increases.
• Main causes
  • Decreased platelets: immune thrombocytopenia (ITP), reduced bone marrow function (myelodysplastic syndrome, leukemia), chemotherapy or radiation, sepsis or DIC, splenomegaly (sequestration-related reduction), drug-induced causes (e.g., some antibiotics and anticancer drugs), functional abnormalities associated with renal or hepatic failure
  • Platelet dysfunction: congenital (Glanzmann disease, Bernard-Soulier syndrome, etc.), acquired (medications such as aspirin and NSAIDs, uremia, liver disease, multiple myeloma, etc.)
  • Increased platelets: reactive (infection, surgery, inflammation), idiopathic or myeloproliferative diseases (such as essential thrombocythemia; abnormalities in genes such as JAK2)
  • RAG reflection: NSAIDs such as aspirin can cause bleeding even at low doses. Multiple myeloma and renal failure can cause platelet dysfunction.
• Main symptoms
  • Bleeding tendency: petechiae, purpura, nosebleeds, gum bleeding, heavy menstrual bleeding, delayed hemostasis after an injury or surgery
  • In severe cases: gastrointestinal bleeding, hematuria, intracranial hemorrhage (rare but potentially fatal)
  • With excessive platelets: possible thrombosis (myocardial infarction, cerebral infarction) and embolism (such as pulmonary embolism)
  • The frequency and severity of symptoms depend on the cause and the platelet count and function

Treatment Methods

• General principles: After identifying the cause, treat the cause (e.g., discontinue the medication if drug-induced and treat the underlying disease). Treatment is determined according to the bleeding risk and severity of symptoms.
• Thrombocytopenia (e.g., ITP)
  • Observation: Monitor the course in cases of mild, asymptomatic disease or minor bleeding
  • Drug treatment: High-dose or maintenance steroids (e.g., prednisone), IVIG (for acute severe bleeding or before surgery), anti-D (according to indications)
  • Long-term or recurrent cases: rituximab, platelet production stimulators (thrombopoietin receptor agonists: romiplostim, eltrombopag)
  • Surgery: Splenectomy may be considered in some patients with recurrent or refractory disease
  • Emergency bleeding: Platelet transfusion (for active bleeding or before surgery), hemostatic support (compression, surgical hemostasis)
• Platelet dysfunction
  • Drug-induced cases: Discontinue the causative medication (including aspirin and NSAIDs)
  • Hemostatic support: Tranexamic acid (an antifibrinolytic agent), DDAVP (effective in uremia or some functional disorders), platelet transfusion (in severe bleeding)
  • Congenital disorders: Platelet transfusion and hemostatic support during bleeding, planned preventive measures before surgery
• Thrombocytosis (idiopathic or myeloproliferative)
  • Reactive: Attempt to normalize the platelet count by treating the underlying cause
  • Essential thrombocythemia: Assess the risk of thrombosis (age, history of bleeding or thrombosis, platelet count, etc.). In high-risk groups, low-dose aspirin (if not contraindicated) and cytoreductive therapy (hydroxyurea, anagrelide) may be considered
• Lifestyle management and precautions
  • Patients at risk of bleeding should exercise caution when taking NSAIDs, aspirin, anticoagulants, or antiplatelet agents (consulting a doctor is essential)
  • Maintain thorough oral hygiene, prevent injuries and falls, and consult a doctor before vigorous contact sports or strenuous dental procedures
  • Be aware of transfusion-related risks (infection, transfusion reactions, and HLA antibody formation)

Outpatient Visit Checklist (Including Example Questions)

• Items to prepare
  • A list of all medications currently being taken (including prescription drugs, OTC medications, supplements, herbal medicines, aspirin, and NSAIDs)
  • Recent test results (blood tests: CBC, peripheral smear, PT/PTT, liver and kidney function tests, etc.) and the dates of the tests
  • A record of bleeding symptoms: location and frequency of bleeding and when recent bleeding occurred (e.g., nosebleeds, gum bleeding, menstrual volume, size of bruises/photos)
  • Medical history: bone marrow disease, autoimmune disease, cancer treatment (chemotherapy or radiation), and bleeding during previous surgery or childbirth
  • Family history: inherited bleeding disorders (if any)
  • Possibility of pregnancy/whether pregnant
• Items to inform the doctor of in advance during the outpatient visit (examples)
  • “I have suddenly developed more bruises over the past few days (I have photos).”
  • “I am taking aspirin/NSAIDs (medication name and dosage).”
  • “I have a scheduled procedure (dental treatment or surgery), so preparation for transfusion or hemostasis is needed.”
  • “My menstrual bleeding has suddenly increased (duration, cycle, and number of pads used).”

Examples of General Questions to Ask the Doctor

• “What is my current platelet count and level of bleeding risk?”
• “What are the expected benefits and side effects of this medication (steroids/IVIG/platelet production stimulators)?”
• “Are there any medications (aspirin, NSAIDs, or supplements) that I should stop immediately?”
• “What is the target platelet count before surgery or dental treatment, and is any special preparation needed?”
• “What is the prognosis without treatment, and what are the advantages and disadvantages of each treatment option?”

Examples of Condition-Specific Questions

• Related to thrombocytopenia (e.g., ITP)
  • “Is steroid treatment appropriate in my case? If it is ineffective, what is the next step in treatment?”
  • “What are the criteria for needing a transfusion or IVIG (platelet count/bleeding findings)?”
• Related to thrombocytosis/thrombotic risk (e.g., essential thrombocythemia)
  • “Do you recommend low-dose aspirin to prevent thrombosis? Do I need to use an anticoagulant together with it?”
  • “Is genetic testing for JAK2 and other genes necessary, and how will treatment change depending on the test results?”

Note: For emergency symptoms (severe headache, changes in consciousness, sudden severe abdominal or chest pain, large-volume gastrointestinal bleeding, persistent or heavy nosebleeds, etc.), immediate evaluation in an emergency department is recommended.