Retinal Metastases as the Initial Presentation of Advanced Lung Adenocarcinoma.

Most lung cancers are diagnosed at an advanced stage. Common metastatic sites include the brain, bone, liver and adrenal glands. Ocular metastases, however, are extremely rare. We present a case of advanced lung adenocarcinoma presenting exclusively with photopsias attributable to retinal metastases. We describe a woman in her fifties, a lifetime non-smoker with an unremarkable medical and family history, who presented to the emergency department with photopsias for a week. Ophthalmology evaluation revealed decreased visual acuity bilaterally, and a fundus examination disclosed lesions suggestive of bilateral retinal metastases. A comprehensive evaluation diagnosed a stage IVb lung adenocarcinoma with exon 19 mutation on epidermal growth factor receptor gene. Subsequently, she developed complaints of headaches and dizziness. She received frontline osimertinib 80 mg daily, preceded by upfront whole-brain radiation therapy with partial orbital inclusion for symptomatic ocular and brain metastases. After ten radiation therapy sessions, her complaints were resolved and an ophthalmology revaluation revealed improvement in visual acuity and resolution of photopsia complaints. The patient is currently on osimertinib and preserves an ECOG score of 0. Retinal metastases usually indicate advanced disease, so presenting with isolated ocular symptoms is exceedingly rare. Especially in cases of uncommon metastases, a multidisciplinary approach is fundamental for a prompt diagnosis and timely treatment, impacting prognosis and quality of life. Ocular metastases in lung cancer are usually a sign of advanced disease.Advanced lung adenocarcinoma presenting solely with retinal metastases is extremely rare.A multidisciplinary team is essential for the diagnosis and treatment of lung cancer with uncommon metastases.

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Conflicts of Interests: The Authors declare that there are no competing interests.