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. 2014 Dec 16;2(1):41.
doi: 10.1186/s40425-014-0041-1. eCollection 2014.

Retinal vasculitis and ocular vitreous metastasis following complete response to PD-1 inhibition in a patient with metastatic cutaneous melanoma

Affiliations

Retinal vasculitis and ocular vitreous metastasis following complete response to PD-1 inhibition in a patient with metastatic cutaneous melanoma

Joshua S Manusow et al. J Immunother Cancer. .

Abstract

We report on a 36-year-old woman treated with the anti PD-1 antibody Pembrolizumab for metastatic cutaneous melanoma in the first line setting. She achieved a complete response and then relapsed with metastases to the vitreous cavity with an associated angiographically determined retinal vasculitis. Vitreous metastasis without choroidal involvement is unusual and may be due to individual cell extravasation, vitreous hemorrhage containing malignant cells, or direct spread through the optic nerve. This finding highlights the need for immune sanctuary sites to be monitored in the presence of PD-1 inhibition and we hypothesize that the use of PD-1 inhibitor potentiated the patient's angiographically determined retinal vasculitis.

Keywords: Melanoma; Melanoma-associated Retinopathy (MAR); PD-1 inhibitor; Retinal vasculitis; Vitreous metastasis.

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Figures

Figure 1
Figure 1
Retrolental cells. Slit lamp photograph of the left eye disclosing cohesive, pigmented, retrolental cells.
Figure 2
Figure 2
Retinal vasculitis. Fluorescein angiogram of the left eye discloses a) diffuse retinal vasculitis in the mid frame with b) leakage in the late frame and c) resolution of vasculitis following vitrectomy.
Figure 3
Figure 3
Histopathology. Photomicrograph shows cohesive groups of malignant epithelioid cells displaying pleomorphic round eccentric nuclei with prominent nucleoli and abundant cytoplasm. a) Hematoxylin and eosin, 63× b) Diff-Quik, 100× . Immunohistochemistry discloses positive staining for c) S-100 stain, 40× and d) microphthalmia stain, 63×.

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