Melanoma-Associated Retinopathy


History of Present Illness

A 30-year-old male with a history of melanoma presents for the first time to the eye clinic complaining of some distortion of images in the left eye (OS). He noticed that in his OS he now sees “through a screen of colored squiggly lines and white dots.” It was hard for the patient to look at dark backgrounds. Initially, these symptoms were intermittent and then became constant within a week of onset.

Exam
OD OS
Visual acuity 20/25+ 20/20
Intraocular pressure (IOP) 14 14
Sclera/conjunctiva White and quiet White and quiet
Cornea Clear Clear
Anterior chamber (AC) Deep and quiet Deep and quiet
Iris Unremarkable Unremarkable
Lens Clear Clear
Anterior vitreous 2+ cell 2+ cell
Dilated Fundus Examination (DFE) See Fig. 39.1

Given the history of nyctalopia in the setting of a normal fundus, electroretinogram (ERG) is pursued ( Fig. 39.2 ).

Fig. 39.1, (A) Ultrawide-field fundus photograph of the right eye showing clear media and normal appearance of the vessels and a flat, small, choroidal nevus inferiorly ( asterisk ). (B) Normal short-wavelength autofluorescence imaging. (C) Fluorescein angiogram (FA) 7 minutes after administration of contrast showing mild perivascular staining/trace leakage ( arrow ) of vessels within the arcades. (D) Near infrared reflectance shows hyporeflectance along vessels (arrow) that were abnormal on FA. (E) Spectral domain optical coherence image extending 9 mm from the foveal center into the superior near midperiphery is within normal limits. The clinical picture is nearly the same for the left eye.

Fig. 39.2, (A) Full-field electroretinograms (ERGs) from the right eye of the patient compared with a normal subject. ERGs are dramatically abnormal with reduced rod-mediated responses, a negative configuration ERG to the (much larger a-wave compared to the b-wave), an abnormal waveform shape for cone-mediated responses, and reduced “on” pathway signal on long-duration on–off ERGs. (B) Horizontal sensitivity profiles measured with achromatic, light-adapted ( top panel ) and dark-adapted, chromatic (500 nm), automatic static perimetry in the patient compared with the normal range ( gray line =mean −2 SD). Dark-adapted photoreceptor mediation estimated with two-color (500 nm and 650 nm) dark-adapted perimetry is shown above the dark-adapted sensitivity profile ( M =mixed rod and cone mediation; C =cone mediation). The gap in the dark-adapted, rod-mediated sensitivity profile corresponds to the rod-free region near fixation. Hatched bar : blind spot. There is a dramatic loss of rod-mediated sensitivities mainly. Sensitivities are mediated by cone photoreceptors for most of the locations. The functional picture is nearly the same for the left eye.

Questions to Ask

  • Are you sure this is a new symptom?

  • Is there a family history of eye or vision problems?

  • Are you otherwise healthy?

The patient was sure this was of acute onset, and there was no family history of retinal degenerations. He had presented a month and a half prior with a left neck node. Fine needle aspiration was positive for melanoma of unknown primary site. One month before presentation he underwent bulky left posterior triangle lymphadenopathy followed by left radical neck dissection and parotidectomy. He had metastatic melanoma involving 3 of 12 lymph nodes. Treatment had not yet been initiated at the time of presentation with visual symptoms. There were no other intercurrent illnesses. He had no history of autoimmune disease.

You're Reading a Preview

Become a Clinical Tree membership for Full access and enjoy Unlimited articles

Become membership

If you are a member. Log in here