Osseous choristoma of the lateral canthus

Congenital solitary osseous choristoma of the left lateral canthus: a case report

BACKGROUND

An ocular osseous choristoma is a growth of mature, compact bone in the ocular or periocular soft tissue, and it is the rarest form of ocular choristoma, accounting for only 1.7% of all epibulbar choristomas.

CASE PRESENTATION

Herein we present the case of a 20-month-old girl who was referred to the oculoplasty clinic with a progressively growing mass in the left lateral canthus. It had been present since birth without ocular involvement. Upon examination the mass was firm with a smooth surface, measured 9 × 6 × 3 mm, and exhibited no episcleral attachment or ocular involvement. An excisional biopsy was performed, and the histopathological findings were consistent with osseous choristoma of the left lateral canthus.

CONCLUSIONS

This report highlights the importance of considering osseous choristoma in the differential diagnosis of eyelid lesions, particularly those that have been present since birth. It also emphasizes the need for further studies investigating associations between osseous choristomas and ocular canthi.

Epibulbar osseous choristoma with dermolipoma: A case report and review of literature

BACKGROUND

A choristoma is defined as a growth of histologically normal tissue in an abnormal location. Epibulbar osseous choristoma is the rarest type among all ocular choristoma with less than 100 cases reported. Here, we report a case of epibulbar osseous choristoma combined with dermolipoma and a literature review.

METHODS

A 15-year-old female patient presented with an accidentally found subconjunctival mass in her left eye. Slit lamp examination revealed a 10 × 10 mm elevated, sigmoid-shaped mass in the supratemporal quadrant of the bulbar conjunctiva. We performed a debulking excisional biopsy of the mass.

RESULTS

The pathology confirmed osseous tissue surrounded by mature adipose tissue. At 1 week after the operation, the wound was clear and the patient was satisfied with the treatment. A systematic literature review of 14 previously published cases taken from PubMed dating back to 1987 along with ours was undertaken. The average age at presentation was 11.6 years and there was a female preponderance with 10 cases being female and the other 5 cases being male. Supratemporal conjunctiva was the most common site of presentation. There was no systemic disease associated with any of the cases. Since it is a benign tumor, it can be managed by observation, but if necessary, it can be treated by surgical removal.

CONCLUSION

In pediatric subconjunctival mass, particularly located in supratemporal quadrant of bulbar conjunctiva, osseous choristoma should be considered in the differential diagnosis. Pre-operative CT scans will helpful to not also reduce complication with surgical excision but also helpful in prediction of diagnosis and prognosis.

Epibulbar osseous choristoma: Two case reports

BACKGROUND

Choristoma is a rare, benign, congenital proliferative tumor, with osseous choristoma being the rarest. Although the tumor is benign, effective identification is needed for its diagnosis and treatment. Here, we report the diagnosis and successful surgical treatment of two patients with osseous choristoma.

CASE SUMMARY

Two patients, a young female and young male patient, were found to have a mass on the ocular surface. The tumor presented on the superior temporal bulbar conjunctiva in the first patient and on the upper eyelid in the second patient. Ultrasound biomicroscopy detected a strong echo with clear boundaries covering the lower echo, and computed tomography examination revealed calcification. Both patients underwent surgery, and histopathological evaluation of the mass showed osseous choristoma. They were treated by excision and subsequently cured.

CONCLUSION

Osseous choristomas are usually asymptomatic. Our patients were cured immediately after surgery, suggesting that surgical treatment is an effective strategy.

A case of epibulbar osseous choristoma with review of literature

Epibulbar osseous choristomas are rare congenital simple choristomas consisting of pure bone on the sclera. It is usually recognized in childhood and most often located in the superotemporal quadrant. A case of 7-year-old male who presented with a history of mass in the left eye was reported in this paper. The mass had been present since birth but had showed slight enlargement during the last 6 months. Examination revealed a 7 × 5 mm reddish, hard, and mobile mass located in the superotemporal quadrant. Excisional biopsy was done. On histopathological examination, excised mass was found to be composed of mature bony trabeculae enclosing osteocytes, and diagnosis of epibulbar osseous choristoma was made.