Exceptional diagnosis of testicular tumour in a patient with paraneoplastic encephalitis

Testicular tumour diagnosis and its management are widely known by urologists, although there are some exceptional diagnoses with rare clinical profiles. We report the unusual case of a young man presenting neuropsychiatric symptoms with no evidence of neurological disease and increased serum anti-Ma2 antibodies, which are associated with germ cell tumours. Our patient was finally diagnosed with a likely left testicular tumour, an orchidectomy was performed and the symptoms disappeared. Only four cases with a similar clinical background and evolution have been reported in the literature.