After obtaining an Institutional Review Board approval of Nagoya Kyoritsu Hospital, Aichi, Japan (approved at the 46th IRB conference of the hospital) and written, informed consent from the patient, we present a case with an unidentified object in the right atrium. A 63-year-old woman undergoing regular hemodialysis (5 years of peritoneal dialysis and 7 years of hemodialysis) due to chronic kidney disease with a past medical history of pyogenic spondylodiscitis and gastric cancer presented to the pain clinic of the department of anesthesiology with complaints of lower backache and pain in her left leg. Her laboratory findings included white blood cell count of 8,900 /μl, blood urea nitrogen 8.96 mg/dl, creatinine 4.05 mg/dl, 2.4 mg/dl of C-reactive protein and she was positive for procalcitonin. Her blood examination was otherwise unremarkable, and blood culture negative for bacteremia. Recurrence of pyogenic spondylodiscitis was suspected, and she underwent an emergency magnetic resonance imaging (MRI) evaluation. Simultaneously, echocardiography was performed to rule out the presence of infective endocarditis, which revealed a fluttering object inside her right atrium (Video 1). The fluttering membranous structure was different from a typical vegetation of infective endocarditis, and a retrospective review of her echocardiography revealed the same structure, suggesting that it was Chiari network. The diagnosis of recurrent of pyogenic spondylodiscitis was made based on her MRI findings [1].