Retinoblastoma in a 48-year-old woman.
OBJECTIVE
The purpose of this study was to describe an unusual presentation of retinoblastoma in an adult.


METHODS
Retrospective case report.


RESULTS
A 48-year-old woman with floaters was found to have an amelanotic intraocular mass with localized vitreous seeds in the superior fundus. Metastatic workup was negative. Cytologic examination of the vitrectomy specimen showed a malignant neoplasm with neuroendocrine differentiation, suspicious for carcinoid tumor. The patient later was found to have a lung lesion presumed to be a carcinoid tumor. She was treated with external beam radiation to the eye, but 1 year later, a new retinal tumor was discovered inferiorly requiring plaque radiotherapy. Soon thereafter, she developed massive intraocular recurrence. The eye was enucleated. Histopathology revealed small round blue cells with round hyperchromatic nuclei. Rosettes were also present within the tumor consistent with retinoblastoma.


CONCLUSIONS
Late-onset retinoblastoma can occur in adults, and the diagnosis can be challenging.
From the *Department of Ophthalmology, Emory University School of Medicine, Atlanta, Georgia; †Retina Specialists of Michigan, Grand Rapids, Michigan; ‡Ocular Oncology Service, Wills Eye Institute, Philadelphia, Pennsylvania; and §Kellogg Eye Center, University of Michigan, Ann Arbor, Michigan.
Jill R
JR
Wells
Thomas M
TM
Aaberg
Carol L
CL
Shields
Grant M
GM
Comer
Hans E
HE
Grossniklaus