Epipalpebral conjunctival chondroid choristoma: Interesting
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Introduction: Choristomas in palpebral conjunctiva are rare. These may present as a sessile or pedunculated protruding mass from the palpebral conjunctiva. Choristomatous elements may be composed of adipose tissue, adnexal structures, chondroid, or osseous tissue. Osseous elements have been reported in epibulbar location. Chondroid elements in palpebral choristoma are extremely rare.
Case Report: A 34-year-old male presented to the ophthalmic clinic with a gradually increasing left palpebral conjunctival swelling of 4-year duration accompanied by irritation and redness of the eye. There was no history of previous trauma. On examination, a nodular pedunculated polypoidal mass was seen over the left eyelid on the palpebral aspect which was clinically diagnosed as a chalazion. The mass was excised and sent for histopathology. On examination, the tissue was well circumscribed, gray white, firm and measured 0.8 cm × 0.4 cm × 0.3 cm. Histopathological examination revealed a well-demarcated area of mature hyaline cartilage comprising mature chondrocytes within lacunae within a matrix of hyalinized ground substance. The overlying conjunctival lining was normal. No other tissues such as dermal adnexal structures, osseous, or lacrimal were identified within the lesion. A histological diagnosis of chondroid choristoma of the palpebral conjunctiva was made.

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