40 Contents lists available at Vilnius University Press Acta medica Lituanica ISSN 1392-0138 eISSN 2029-4174 2022. Online ahead of print DOI: https://doi.org/10.15388/Amed.2021.29.1.6 Jackstone: A Calculus “Toy” in the Bladder. A Case Report of Rare Entity and Comprehensive Review of the Literature Received: 08/10/2021. Revised: 15/11/2021. Accepted: 16/11/2021 Copyright © 2022 Evangelos N. Symeonidis, Dimitrios Memmos, Anastasios Anastasiadis, Ioannis Mykoniatis, Eliophotos Savvides, Georgios Langas, Panagiotis Baniotis, Athanasios Bouchalakis, Stavros Tsiakaras, Panagiotis Stefanidis, Michail Stratis, Wilbert F. Mutomba, Ioannis Vakalopoulos, Georgios Dimitriadis. Published by Vilnius University Press.This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. * Corresponding author: Evangelos N. Symeonidis, 1 st Department of Urology, Aristotle University of Tessaloniki, “G. Gennimatas” General Hospital, Ethnikis Aminis 41, 54635, Tessaloniki, Greece. Tel: +0030 694 684 4144 (mobile), +0030 2310 963 102 (work). Email: evansimeonidis@gmail.com Evangelos N. Symeonidis * 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece ORCiD: https://orcid.org/0000-0002-6360-0762 Dimitrios Memmos 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Anastasios Anastasiadis 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Ioannis Mykoniatis 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Eliophotos Savvides 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Georgios Langas 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Panagiotis Baniotis 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Athanasios Bouchalakis 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Stavros Tsiakaras 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Panagiotis Stefanidis 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Michail Stratis 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Wilbert F. Mutomba 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Ioannis Vakalopoulos 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece Georgios Dimitriadis 1 st Department of Urology, Aristotle University of Tessaloniki, School of Medicine, “G. Gennimatas” General Hospital, Tessaloniki, Greece