KD with Myocardial Tumor

To the author’s knowledge, cardiac tumor combined with KD has not yet been reported. Primary cardiac neoplasm (PCN) was rare. Autopsy confirmed its morbidity between 0.17% and 0.28% (Zhong-min et al., Practical clinic cardiac surgery [M] 623–631, 2010). With echo, CT, and MR application, more and more asymptomatic patients are found by chance. PCN was divided into benign and malignant, at a ratio of 3:1. According to the morbidity, benign tumor was cardiac myxoma, cardiac fibroma, cardiac rhabdomyoma, and so on. About 66.7% of benign cardiac tumor is myxoma, which mostly come from atrial septum. Cardiac fibroma was the second common cardiac benign tumor (Toyama et al., Rep Case Kyobu Geka 70(4):317–319, 2017). Although it was called benign tumor, it is with the character of malignancy. Surgery usually cannot remove the tumor completely and they recur after operation. Furthermore, it also results in sudden death in children (Aw et al., Pediatr Cardiol 8(2):394–400, 2017). Cardiac rhabdomyoma is a rare PCN with skeletal muscle differentiation, which is the most common PCN in children, especially in newborns and infants. It may be partially or completely dissipated; so conservative treatment is generally recommended (Dinesh Kumar et al., Ann Card Anaesth. 19(4):728–732, 2016). Only when cardiac rhabdomyomas cause hemodynamic obstruction or heart rhythm disorders that affect cardiac function, medical treatment or surgical resection is necessary. The main purpose of surgery is to relieve hemodynamic blockage, protect ventricular and valve function, and prevent conduction damage. We are reporting a case of left ventricular mass presenting with KD.