1. Introduction
Pelvic tuberculosis is seen in 1.5% of women with tuberculosis and is common in the age group of 30-40 years. Extra-pulmonary involvement accounts for 15-20% of all tuberculosis cases. Pelvic involvement caused by tuberculosis is rare in children and adolescents [1, 2]. In virgin girls, pelvic tuberculosis is also rare, and due to nonspecific symptoms and radiographic studies, there is a possibility of misdiagnosis, and mortality.  This study reports a case of pelvic tuberculosis in a 12-year-old virgin girl.
2. Case presentation
In this case report, patient was a 12-year-old virgin girl with disseminated pelvic tuberculosis and peritonitis. Rebound tenderness in the abdominal examination and a fever (a temperature of 38 °C) were reported. Age at menarche was 10 and she had no menstrual irregularities. The ultrasound showed an 8-cm cystic mass in the right ovary with some fluid in the pelvis. 
3. Conclusion
Pelvic and abdominal tuberculosis is a rare disease and is difficult to diagnose due to having manifestations similar to other diseases (e.g. ovarian malignancies) and may present with abdominal pain, mass, and ascites [3]. Due to possibility of misdiagnosis, existence of strong clinical suspicion, especially in girls exposed to tuberculosis, is important in diagnosing the disease.
In women who are at risk for tuberculosis, the possibility of pelvic tuberculosis should always be considered along with other diagnoses.

Ethical Considerations
Compliance with ethical guidelines
In this study, all procedures were according to ethical guidelines of local institutions and the Declaration of Helsinki. An ethical approval was obtained from the Ethics Committee of Guilan University of Medical Sciences (Code: IR.GUMS.REC.1400.231). A written informed consent was obtained from the patient and she was assured of the confidentiality of her information. No additional costs were imposed on the patient and routine treatment was provided to her.

Funding
This research did not receive any grant from funding agencies in the public, commercial, or non-profit sectors. 

Authors' contributions
Conceptualization and design: Roya Kaboodmehri, Zahra Rafiei Sorouri, Seyedeh Hajar Sharami; Initial Draft Preparation and Supervision: Roya Kaboodmehri and Nasrin Ghanami Gashti; Reviewing and Revising: Roya Kaboodmehri. 

Conflicts of interest
The authors declare no conflict of interest

Acknowledgements
The authors would like to thank the patient and the Reproductive Health Research Center for their cooperation.


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