We present the case of a patient with lung adenocarcinoma stage IVB diagnosed as orbital apex syndrome (OAS) associated with intraorbital metastasis of lung cancer. When patients with lung cancer have diplopia, ptosis or ocular motility disorder, identifying OAS is important.
In lung cancer patients, brain metastasis is often suspected when neurological symptoms appear; however, if ptosis, ocular motility disorder or optic nerve disorder is observed, it is important to identify and treat the orbital apex syndrome.
Keywords: lung cancer; ocular motility disorder; optic nerve disorder; orbital apex syndrome; ptosis.
© 2022 The Authors. Respirology Case Reports published by John Wiley & Sons Australia, Ltd on behalf of The Asian Pacific Society of Respirology.