Acknowledgments: SR Grover from Murdoch Children's Research Institute, Royal Children's Hospital for advices in formulating the concept of the manuscript, AV Asaturova head of the 1st pathoanatomical department of the Kulakov Federal State Budgetary Institution NMICAGP for help in editing the manuscript.

Author contribution: Batyrova ZK, Bolshakova AS — concept; Batyrova ZK, Kruglyak DA, Uvarova EV, Chuprynin VD, Mamedova FSh — collection and processing of material; Batyrova ZK, Bolshakova AS, Kumykova ZKh — text writing; Kumykova ZKh, Sadelov IO, Trofimov DYu — editing. All authors approved the final manuscript. All authors were involved in the clinical management of the patient and contributed to the final diagnosis.