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Primary malignant melanoma of the orbit arising in a cellular blue naevus.
  1. K U Löffler and
  2. H Witschel
  1. Department of Ophthalmology, Freiburg University, FRG.

    Abstract

    Primary malignant melanoma of the orbit is a rare clinical entity. We report the clinical course and present the light and electron microscopic findings in a case arising in a cellular blue naevus. While most orbital melanomas are associated with a naevus of Ota, there was no clinically visible abnormal pigmentation in our patient. The possible origin of the tumour cell and its ultrastructural features are discussed.

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