A blind eye may be associated with pain, which is a challenge for the ophthalmologist. The most common conditions leading to the development of a blind painful eye (BPE) are trauma, miscellaneous retinal disorders and retinal detachment, and the majority of these eyes are enucleated to relieve the pain.1

Few cases of malignant tumors arising from BPE have previously been described. 234567 From literature review, the frequency of unsuspected intraocular tumors in blind painful eyes has declined over the past twenty years mainly due to ocular ultrasound (US) examination. We described two cases of BPE containing unsuspected tumor, which were enucleated to relieve the pain.

Case 1: A 57 year-old Caucasian man had a previous history of cataract surgery, left eye (OS), in 1984. In 2000, the patient presented with recurrent orbital cellulitis and endophthalmitis OS. The OS was blind and painful and an enucleation was performed (Figure 1A). Histopathology revealed a malignant uveal melanoma, epithelioid cell type (Figure 1B), invading the sclera and orbital tissues. No signs of metastatic disease were detected after four years of follow-up.

Case 2: A 54 year-old Caucasian man suffering from Steinert's syndrome had a blind, atrophic OS since 1980. Past medical history includes systemic hypertension and several ophthalmic procedures OS, including a cataract surgery (1971) and a rhegmatogenous retinal detachment (1978). In 1992, the patient presented with pain in the OS and an uneventful enucleation was performed (Figure 1C). Histopathologic examination disclosed a monotonous and diffuse proliferation of small lymphocytes in the uveal tract with extra ocular extension. Immunohistochemical study was strongly positive for CD20 (B lymphocytes) and negative for CD45RO (T lymphocytes), consistent with a well-differentiated B-cell lymphoma (Figure 1D). No signs of systemic involvement were detected. The patient was lost to follow-up six years after surgery.

Severe pain may develop in blind eyes for various reasons including surgical and non-surgical trauma, and retinal detachment. Management of a blind painful eye represents a challenge for the ophthalmologist and is limited to topical medications, retrobulbar alcohol injection, evisceration or enucleation.1

Relief of ocular pain is the most common reason that enucleation is performed in BPE.1 In the past, ocular melanomas arising in a BPE could account for more than 10% of all diagnosed uveal melanomas.8 Volcker and Naumann9 in 1976 described 36 cases of unsuspected ocular melanoma that were diagnosed after enucleation. The clinical diagnoses in those cases were secondary glaucoma (30), retinal detachment (2), iritis (2), and end/panophthalmitis (2). Review of the literature today shows that the clinical suspicion rate of an intraocular malignancy in BPE is not well established. Previous studies of enucleated globes do not correlate blindness with unsuspected intraocular tumors.10

In this particular report, the unsuspected melanoma was present in a blind painful eye of a mentally handicapped patient. Intraocular lymphomas of the uveal tract have been discovered in functional eyes with symptoms of retinal detachment and increased intraocular pressure.

Intraocular tumors arising in blind painful eyes are probably under diagnosed and underreported. Several uveal melanomas, 457 two adenocarcinomas of the retinal pigment epithelium 23 and an unspecified sarcoma 6 have been described (Table 1). In two of those cases, enucleation was performed to relieve the pain and an early stage malignant tumor was found,27 leading to a good prognosis. However, in cases with advanced disease and extra-ocular involvement, an enucleation was performed due to a high index of suspicion of an intraocular malignancy.456 In those cases the prognosis was poor.

Several authors emphasized the importance of ultrasonographic studies to diagnose intraocular tumors in blind painful eyes.511

In the management of a blind painful eye, it is extremely important to rule out an intraocular malignancy particularly in those patients who have not been followed by an ophthalmologist. In these cases, it is the duty of the attending physician to emphasize to the patient the importance of regular examination of the blind eye because, like in all malignancies, advanced disease leads to a worse prognosis.4 The present report also emphasizes the importance of subjecting enucleated globes to a histopathological examination, since an unsuspected intraocular malignancy may be hidden in a blind painful eye.

The author(s) declare that they have no competing interests.

PRP wrote the manuscript

ANO, JPSP and VS revised the histopathology of the cases and the manuscript

DGC prepared the pictures and revised the manuscript

MNB revised the entire manuscript