Obstruction of the superior vena cava

Editor,—Obstruction of the superior vena cava (SVCO) is a condition which causes a variety of symptoms and signs in the upper body, such as oedema of the face, arms and neck, facial erythema, dyspnoea, cough, hoarseness, dysphagia, and mental status changes.1 It may, however, present to an ophthalmologist through features such as conjunctival venous engorgement, chemosis, non-pulsatile proptosis, glaucoma, retinal venous changes, and papilloedema.2 3 It is an important diagnosis as there is usually associated serious pathology, frequently malignancy.1 We present a case of …