An orbital hydatid cyst involving inferior rectus muscle: A case report

ABSTRACT

The orbital hydatid cyst is a rare entity and although most of them are located in superolateral and superomedial angles of orbits, involvement of inferior sites is uncommon. We report a 12-year-old case of primary hydatid cyst situated in inferior rectus muscle which was undergone surgical removal. Magnetic resonance imaging (MRI) was used for differential diagnosis of hydatid cyst. Moreover, histological analysis was performed, after the cyst removal, to confirm the diagnosis. Early clinical and radiological evaluations and subsequent surgical excision is the mainstay of treatment and should be performed to prevent severe complications caused by the advanced and ruptured cysts.

Abbreviations: MRI: magnetic resonance imaging; CNS: central nervous system; BCVA: best corrected visual acuity; CT: computed tomography; USG: ultrasonography

KEYWORDS:

• Inferior rectus muscle
• magnetic resonance imaging (MRI)
• orbital hydatid cyst
• surgical excision

Declaration of interest

The authors report no conflict of interests. The authors alone are responsible for the content and writing of the article. Authors Saravi and Sabouni are equal first co-authors of this article. Dr. Rajabi designed the surgical technique and performed the surgery. Dr. Saeedi Saravi wrote the manuscript and performed the literature review for similar topics. Dr. Sabouni collaborated on the design of the technique and surgery. Dr. Arefidoust, Yaftian and Heydarzadeh performed the literature review for similar topics. All authors have read and approved the final manuscript.

Consent

Written informed consent was obtained from the patient for publication of this case report and any accompanying images. A copy of the written consent is available for review by the Editor of this journal.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the Institutional and/or National Research Committee and with the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards. The study protocol was approved by the local ethics review committee of Tehran University of Medical Sciences, Tehran, Iran.