Clinical Features of Intratarsal Keratinous Cysts
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PURPOSE
Intratarsal keratinous cysts (IKCs) have been frequently misdiagnosed as chalazia or epidermal cysts. We reviewed a series of cases of IKCs to identify clinical features that distinguish IKCs from other eyelid diseases.

METHODS
We retrospectively reviewed the medical records of 17 suspected IKC patients between January 2004 and September 2014.

RESULTS
Seventeen patients who were clinically suspected to have IKC were enrolled. All patients presented with non-inflamed eyelid nodules fixed to the tarsus. Among them, 12 biopsy specimens were available and 11 patients (91.7%) were diagnosed with IKC, with a pathological finding of stratified squamous cell lining with keratin material. The mean patient age was 55.1 years (31-71). Six patients had a surgical history of incision or incomplete excision of the lesion, followed by recurrence. On eyelid eversion, five patients showed a white-yellow nodule, and three patients had a bluish cystic lesion. The diameter of the nodules ranged from 4 to 10?mm. The intracystic material was a milky white fluid. Ten patients underwent a complete surgical excision including partial tarsectomy and there was no recurrence.

CONCLUSIONS
IKC can be distinguished from other intratarsal lesions by a characteristic tarsal nodule fixed to the tarsus. To prevent recurrence, complete excision with partial tarsectomy is needed.

https://www.nature.com/eye/journal/v30/n1/pdf/eye2015184a.pdf
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