[Parinaud syndrome caused by corpus pineale tumour in a 14-year-old boy].

Parinaud syndrome (PS) can manifest in a pineal tumour. Major components of PS include restriction of gazing upwards, light-near dissociation and convergence retraction nystagmus. A 14-year-old boy presented with diplopia and restricted ability to gaze upwards. The objective examination revealed signs, which were compatible with the major manifestations of PS. A magnetic resonance scan (MRI) of cerebrum indicated pinealoma, and a pathological examination identified the lesion as a germ cell carcinoma. The patient received chemotherapy and stereotactic radiosurgery. The ophthalmic symptoms improved, and a follow-up MRI demonstrated complete regression of the tumour.