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Archivos de la Sociedad Española de Oftalmología (English Edition) Bilateral optic neuritis secondary to pembrolizumab. A rare adverse event second...
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Clinical Case
Available online 28 April 2026

Bilateral optic neuritis secondary to pembrolizumab. A rare adverse event secondary to the administration of checkpoint inhibitors: A case report

Neuritis óptica bilateral secundaria a pembrolizumab. Un evento adverso infrecuente secundario a la administración de inhibidores del check-point: a propósito de un caso
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P.M. Espacio Santosa,
Corresponding author
, F. Rabadán Márquezb,
Corresponding author
flores.rabadan@salud-juntaex.es

Corresponding authors.
, P. Tejada Calvoa, J. Venegas Cruzb, J.M. Rodríguez Garcíaa, R.M. Bayon Porrasb
a Servicio de Oncología Médica, Complejo Universitario Hospitalario de Cáceres, Cáceres, Spain
b Servicio de Oftalmología, Complejo Universitario Hospitalario de Cáceres, Cáceres, Spain
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Abstract

Toxicity secondary to checkpoint inhibitors (ICP) can affect numerous parts of the body, with varying frequency. We present a case of bilateral optic neuritis secondary to the use of pembrolizumab (an anti-PD-1), which has been described in the literature in less than 1% of cases associated with the use of anti-PD-1/PD-L1 and anti-CTLA4 (ICP).

Keywords:
Optic neuritis
Check-Point Inhibitors (ICP)
Pembrolizumab
Lung cancer
Immune-related adverse events (irAEs)
Resumen

La toxicidad secundaria a Inhibidores del Check-Point (ICP) puede afectar a numerosas partes del organismo con una frecuencia variable. Presentamos a continuación un caso de neuritis óptica bilateral secundaria al uso de Pembrolizumab (fármaco antiPD-1), descrita en la literatura en menos del 1% de los casos en relación con el uso de fármacos antiPD-1/PD-L1 y antiCTLA4 (ICP).

Palabras clave:
Neuritis óptica
Inhibidores del Check-Point (ICP)
Pembrolizumab
Cáncer de pulmón
Efectos adversos relacionados con el sistema inmunitario (irAE)

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