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  • Title: A clinicopathologic study of three carcinoid tumors metastatic to the orbit. Immunohistochemical, ultrastructural, and DNA flow cytometric studies.
    Author: Shetlar DJ, Font RL, Ordóñez N, el-Naggar A, Boniuk M.
    Journal: Ophthalmology; 1990 Feb; 97(2):257-64. PubMed ID: 2109298.
    Abstract:
    Three patients with histopathologically proven orbital metastatic lesions from a carcinoid tumor are reported. Computed tomography (CT) disclosed a well-circumscribed orbital mass in two of three cases. Each tumor was studied by both light and electron microscopy as well as immunohistochemistry and DNA flow cytometry. A review of the literature discloses the relatively rare occurrence of carcinoid tumors metastasizing to the eye and orbit. With the exception of one case, the reported metastatic carcinoid tumors to the uvea all developed from primary bronchial carcinoids. In contrast, the vast majority of the reported orbital metastases arose from ileal carcinoids. Immunohistochemical markers such as chromogranin A, synaptophysin, and serotonin have proven to be useful diagnostic tools in evaluating carcinoid tumors. Furthermore, DNA flow cytometry may be of prognostic value in patients with metastatic carcinoid tumor.
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