Inroduction
Romiplostim is an agonist of the thrombopoietin receptor that stimulates platelet production. Several studies have evaluated the role of romiplostim in the prevention of chemotherapy-induced thrombocytopenia (CIT). Romiplostim may reduce dose reductions, treatment delays, bleeding events, and transfusions.
Less is known about treatment of CIT in patients with pre-existing thrombocytopenia (TCP), such as those with myelodysplastic syndrome (MDS). Here we present a case of a patient with TCP secondary to MDS who was given romiplostim during the treatment of pancreatic adenocarcinoma with FOLFIRINOX.
Case Report
The patient is a 76-year-old male with history of chronic TCP (baseline platelets 50-90 K/μL) presumed secondary to myelodysplastic syndrome, although a bone marrow biopsy was inconclusive. He had not had any major bleeding events or transfusions, aside from one unit of platelets given after a cervical spine fusion.
He was later diagnosed with borderline-resectable pancreatic adenocarcinoma, Stage IbT2N0. Plan made to administer neoadjuvant FOLFIRNOX chemotherapy, followed by Whipple.
The patient was started on romiplostim with a dose range of 1-10 mcg/kg weekly to maintain platelets between 60-200. We initially planned to give all 12 cycles neoadjuvantly but found that we could not maintain a platelet count over 50 K/μL despite maximal uptitration of romiplostim so the Whipple was performed after Cycle 9. Three additional cycles were given post-operatively. There were no dose-reductions, although oxaliplatin was held after cycle 9 due to neuropathy. He developed a jejunal bleed post-Whipple that required embolization but did not require transfusion.
Summary
This was a case in which romiplostim was successfully used during FOLFIRINOX to support platelets in a patient with baseline TCP from MDS. Despite a jejunal bleed after Whipple, the patient tolerated the treatment well and was able to complete all 12 cycles of peri-operative FOLFIRINOX. This approach may be beneficial in other patients with pre-existing TCP receiving chemotherapy.
