Fibrous Histiocytoma of the Conjunctiva

PurposeTo review the clinical features and course of six patients with fibrous histiocytoma (FH) of the conjunctiva.DesignRetrospective, observational clinical case series.MethodsChart review of six consecutive patients with unilateral cases of conjunctival FH was conducted. Clinical presentation, treatment, histopathologic condition, and follow-up information were recorded.ResultsThe mean patient age was 37 years (median, 38 years; range, 12 to 72 years). There were five white patients, one black patient, five male patients, and one female patient. The tumor was present for a mean of three months (median, five months; range, one to 12 months) and was unilateral (one right eye, five left eyes). In all cases, the tumor was a tan, dome-shaped limbal mass in the conjunctival stroma with visible intrinsic vessels. The mean tumor basal dimension was 7 mm (median, 5 mm; range, 4 to 11 mm). Surgical resection was performed in all cases, and histopathologic study demonstrated benign FH in four cases and malignant FH in two cases. Those cases with benign FH showed no recurrence over nine months (median, eight months; range, three to 18 months). One patient with malignant FH showed recurrence and required repeat excision. The other patient with malignant FH was treated with plaque radiotherapy to maintain control. There was no evidence of orbital invasion or remote metastasis in any case over the mean follow-up period of 21 months (median, 10 months; range, three to 80 months).ConclusionFH is a rare conjunctival tumor that can show benign or malignant features. Complete resection is advised. Malignant FH can demonstrate recurrence that necessitates wide resection and radiotherapy.