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Case Reports
. 2025 Apr 11;25(1):199.
doi: 10.1186/s12886-025-04024-9.

Epibulbar osseous choristoma

Shan Zhong  1 , Jiangwei Fu  1 , Min Hu  1 , Xiaolin Zhang  1 , Pu Cheng  2
Affiliations
Case Reports

Epibulbar osseous choristoma

Shan Zhong et al. BMC Ophthalmol. .

Abstract

Osseous choristoma constitutes the rarest category of choristoma affecting pediatric ocular regions. It predominantly composed of ectopically ossified tissue, which can involve anywhere in the eye and typically manifest as isolated anomalies. This study presents the case of an 8-year-old male patient diagnosed with epibulbar osseous choristoma. The choristoma exhibited significant adhesion to the superficial sclera, as corroborated by comprehensive diagnostic imaging, encompassing both macroscopic and pathological analyses. This case contributes to a deeper understanding of the lesion's primary localization, pathological features, and etiological mechanisms, thereby informing differential diagnosis and surgical treatment approaches.

Keywords: Case report; Congenital; Epibulbar choristoma; Excision biopsy; Osseous choristoma; Treatment of Choristoma.

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Conflict of interest statement

Declarations. Ethics approval and consent to participate: The studies involving humans were approved by the Ethics Committee of Ningbo Aier Guangming Ophthalmic Hospital. The studies were conducted in accordance with the local legislation and institutional requirements. Written informed consent for participation in this study was provided by the participants’ legal guardians/next of kin. Consent for publication: Written informed consent was obtained from the parents/legal guardians for the publication of this case report. Competing interests: The authors declare no competing interests. Author information: Not applicable.

Figures

Fig. 1
Fig. 1
Preoperative examination. A-B: Slit-lamp examination showed the mass located in the superotemporally of the right eye. C: B-mode Ultrasound of the right eye at 50 Hz revealed no notable abnormalities. D: CT scan images showed a crescent-shaped calcified nodule on the lateral wall of the right eyeball, clearly demarcated with no involvement of the extraocular muscles (red arrow)
Fig. 2
Fig. 2
Intraoperative appearance of the mass. A-B: The mass exhibited characteristics similar to bone, with a cap-like appearance, approximately 9 mm × 7 mm
Fig. 3
Fig. 3
Histopathology of the excised mass. A: The tumor contains a well-defined mature cortical bone within which acellular sequestrum is seen (arrow), encased by a thin fibrous connective capsule. B: The periphery of the tumor consisted of fragmented fibrous connective tissue
See this image and copyright information in PMC

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