Urinary tract calculi are rarely occur outside the urinary tract  [1,2], that because stone formation is a slow process and needs prolonged time of urine stasis. One of the sites of extra-urinary tract stone formation is the vagina for its proximity to the UT, so when there is a predisposing factor for urine stagnation in the vagina the risk of stone formation increased. VS is a rare condition with low incidence and non-specific presentation, so it is usually misdiagnosed asUB stone and is incidentally discovered when it is large enough to cause bother symptoms and signs [2,3,4]. The first reported case of VS is dated back to 1900 [5,6], and since that time many cases were reported with different presentation, predisposing factors, age group and modalities of treatment that were applied. VS is a pathologic calcification disease classified into primary or secondary depending on presence or absence of foreign body in the vagina [6,7,8]. Primary VS usually resulted from urinary stasis in the vagina with concomitant persistent and/or recurrent infection, especially with urease producing bacteria (proteus and klebsiella) leading to deposition of inorganic salts and formation of struvite stone in the majority of cases [2,3,9], calcium oxalate stone have been also reported [10]. Many conditions can lead to urine leak and stagnation in the vagina, of them urinary vaginal fistula is the commonest one [1,4], other causes include ectopic vaginal ureter, vaginal outlet obstruction, neurogenic bladder, mental retardation associated with urinary incontinence, urethral diverticulum and long term recumbent position [4,8,9]. Secondary VS are less common and precipitated by presence of foreign body within the vagina that act as a nidus around which urinary salts are deposited, examples of foreign bodies are eroded surgical mesh, missed vaginal pessaries, intrauterine devices and non-absorbable sutures [1,2,4]. In rare situations UB stone is migrated through fistulous tract into the vagina causing VS [2,9].Diagnosis of VS needs a high index of suspicion as it has a wide range of non-specific symptoms such as frequent urination, urgency, vaginal pain, dyspareunia, partner complain during sex, vaginal bleeding or discharge and symptoms of infection [1,3], the main presentation of our case was continuous urine leak that is not associated with urgency or straining conditions. Imaging studies like USS, plain X ray, CT and MRI may be done [3,6], but gynecological examination is very important in confirming the diagnosis, especially when it is accompanied with cystourethroscopy and vaginoscopy to visualize the stone and associated abnormalities like fistulae [8,10], and this was the essential diagnostic test in our case to reach the diagnosis and to identify the fistula as the main cause of the continuous urine leak and the subsequent VS formation as USS showed UB stone only. VS is treated by simple extraction or endoscopically using small size nephroscope and disintegration device, the second option is useful when there is a difficulty in diagnosis and in young girls to avoid the risk of damaging the UB, vaginal mucosa and the hymen [3,8,11], some authors advocate abdominal approach with UB incision or anterior vaginal wall opening to keep the integrity of the hymen [4]. In our case we used simple extraction technique assisted withdecircumcisionto facilitate removal ofhuge stone as the hymen was not intact due to its damage possibly by the stone as it was protruding through vaginal orifice distal to the level of the hymen. Identification of predisposing factor for VS formation and their correction is crucial to prevent further recurrence, like fistula repair, removal of foreign body and care about personal hygiene [1,4,7]. Urinary vaginal fistula repair should be deferred for 3-6 month after stone removal when the edema around the fistula has subsided [3,7], and this was the policy followed in our case.