TO THE EDITORS:Recurrence of hepatocellular cancer (HCC) after liver transplantation (LT) is uncommon (<10%). 1 We present an unusual case of an LT recipient with gradually rising alpha-fetoprotein (AFP) levels who was eventually diagnosed with metastatic HCC to the right ventricle.A 57-year-old man with hepatitis C cirrhosis underwent chemoembolization for a 2.0-cm HCC lesion and then deceased donor LT in 2004. His AFP level at the time of LT was 610 ng/mL, and the explant showed 3 lesions (all < 2 cm) with microvascular invasion. His immediate post-LT AFP level was 2.8 ng/mL, and it remained normal until 2007 when it rose to 400 ng/ mL; chest imaging demonstrated a 3.2-cm lung mass. With no other metastases, he underwent lung resection. His AFP level remained low thereafter (nadir 5 18 ng/mL) but began to increase in 2009 to a peak of 1631 ng/mL in 2012. Within this period, there was no evidence of recurrent HCC on multiple chest, abdomen, pelvis, and bone scan examinations. In mid-2012, echocardiography before sinus surgery revealed a 4.8-cm right ventricular free wall echodensity (Fig. 1). On cardiac magnetic resonance imaging, the mass was isointense and lacked enhancement, this strongly favoring malignancy (Fig. 2). Tissue biopsy was deferred because of this imaging, the elevated AFP level suggesting HCC, and the risk of embolization. No other metastases were found. He was treated with sorafenib (400 mg twice daily), but his AFP level has been progressively rising.The case presented a diagnostic dilemma because the AFP level was slowly increasing over years without evidence of recurrent HCC. Because the AFP level is increased in approximately 70% of HCC cases before LT, it is perhaps more useful than imaging for serially monitoring patients for recurrence after LT. This is particularly true if the AFP level normalizes and subsequently increases after LT. 2 The typical sites (ie, the lungs, liver, adrenal glands, lymph nodes, and bone) were not involved in this case, nor was the hepatic vein or inferior vena cava. Thus, this represented a true cardiac hematogenous metastasis, which is rare Figure. 1. A 4-chamber view of the heart from 2-dimensional echocardiography demonstrates a large spherical echodensity (4.8 cm 3 2.7 cm) arising from the right ventricular free wall and occupying the right ventricular cavity. [Color figure can be viewed in the online issue, which is available at wileyonlinelibrary.com.] Figure. 2. An axial image from cardiac magnetic resonance imaging shows a 3.2 cm 3 5.2 cm 3 4 cm mass that appears adherent to the inferior wall of the right ventricle and demonstrates an isointense signal to the myocardium.
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