1. Which driver mutations are most responsible for the activation of the JAK-STAT pathway leading to the development of myelofibrosis (MF)?

2. Which of the following statements regarding the Dynamic International Prognostic Scoring System (DIPSS) is FALSE?

3. In patients with which type of myelofibrosis-associated anemia are erythropoiesis-stimulating agents (ESAs) most appropriate and most likely to produce a response?

4. Use the following CASE to answer questions 4 through 8:
KG is a 70-year-old male with a past medical history of hypertension who presents to his primary care provider (PCP) with fatigue and abdominal pain. The PCP appreciates splenomegaly upon physical exam. KG’s medications include lisinopril 10 mg daily and a daily multivitamin.

KG’s vital signs and lab results are as follows:
Weight, 68 kg
Height, 5’9”
Blood pressure, 125/80 mmHg
Heart rate, 78 bpm
Hemoglobin, 8.5 g/dL
Hematocrit, 35%
Platelets, 180 x 109/L
White blood cells, 20,000/µL
Serum creatinine, 1 mg/dL
Blood urea nitrogen, 18 mg/dL
Aspartate transaminase, 24 U/L
Alanine transaminase, 32 U/L
Total bilirubin, 0.5 mg/dL
Lactate dehydrogenase, 350 U/L

A bone marrow biopsy demonstrates fibrosis and a genetic evaluation reveals a JAK2 mutation with no high-risk mutations.


KG is diagnosed with primary myelofibrosis (PMF). His Dynamic International Prognostic Scoring System (DIPSS)-Plus score indicates he has intermediate risk 2 (INT-2) disease. What is the best treatment option for KG?

5. The oncologist decides to initiate ruxolitinib and asks you for the correct starting dose for KG. Which is the correct initial dose?

6. After 6 weeks of ruxolitinib therapy, KG is experiencing thrombocytopenia with a platelet count of 45 x 109/L. What is the appropriate management strategy for KG's ruxolitinib?

7. After 2 years of ruxolitinib therapy with dose-titrated response, KG is now experiencing progressive splenomegaly over the past 6 months. What is the best treatment option for KG at this point?

8. On what point would you council KG regarding his therapy with fedratinib?

9. Which statement regarding novel treatment strategies for myelofibrosis (MF) is true?

10. Which statement concerning JAK inhibitor therapy is FALSE?

Evaluation Questions

11. How confident are in your treatment choices for KG in questions above:

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