Abstract. Platinum-based chemotherapy plus cetuximab represents the first-line treatment for recurrent or metastatic squamous cell carcinoma of the head and neck. The most common adverse events associated with cetuximab are infusion reactions and skin reactions, and a risk of venous thromboembolic events has also recently been reported in association with cetuximab. It is well known that thrombosis is a common complication of malignancy, and represents the second most frequent cause of mortality in cancer patients. The present study reports the case of a 79-year-old man who presented with lung and liver metastases from tongue squamous cell carcinoma, for which platinum-based chemotherapy plus cetuximab was administered. After 1 cycle, the patient showed rapid growth of a left ventricular (LV) thrombus, despite ongoing antiplatelet therapy for an old myocardial infarction. Anticoagulant therapy was administered to treat the LV thrombus, which resolved within 1 week. To the best of our knowledge, this represents the first reported case of rapidly occurring LV thrombus associated with platinum-based chemotherapy plus cetuximab. Platinum-based chemotherapy plus cetuximab may be associated with a higher risk of embolic thrombus.
IntroductionPlatinum-based chemotherapy plus cetuximab represents the first-line treatment for recurrent or metastatic squamous cell carcinoma (SCC) of the head and neck (1). In the European Phase III EXTREME trial of patients with recurrent or metastatic SCC of the head and neck, the addition of cetuximab to platinum/5-fluorouracil (5-FU) in the first-line setting significantly improved the rates of overall survival, progression-free survival and overall response compared with platinum/5-FU alone (1). However, cetuximab treatment is associated with certain adverse events, the most common of which are infusion reactions and skin reactions. Additionally, a risk of venous thromboembolic events (VTEs) has recently been reported in association with cetuximab (1). It has been suggested that the association between cetuximab and risk of thrombosis may be due to the antiangiogenic effects of cetuximab (2).VTEs are considered to be under-diagnosed, as patients are typically asymptomatic at presentation and are often only diagnosed incidentally (2). A previous study reported that the majority of VTEs (92%) were identified during radiological examinations scheduled for tumor reevaluation (3).The present study reports the case of a 79-year-old man who presented with lung and liver metastases from a tongue SCC, and suffered rapid growth of a left ventricular (LV) thrombus following 1 cycle of platinum-based chemotherapy plus cetuximab. Anticoagulant therapy was administered to treat the LV thrombus, which resolved within 1 week. The current report highlights the potential association between platinum-based chemotherapy plus cetuximab and the increased risk of embolic thrombus.
Case reportA 77-year old male patient initially presented to Department of Oral and Maxillofacial Reconstructive Surgery, Okayama