Longitudinally extensive transverse myelitis (LETM) is defined as an inflammatory lesion of the spinal cord that extends to three or more segments. LETM is a commonly characteristic feature of neuromyelitis optica (NMO) or various autoimmune diseases. Manifestation of Mycobacterium tuberculosis (MTB) infection with LETM are rare and usually in the cervicothoracic spinal cord. Our patient presented with holocord LETM, so NMO was considered initially diagnosis. After in further research, MTB was diagnosed and treated successfully. The current case underscores that tuberculosis must be keep in mind when undertaking differential diagnosis of demyelinating diseases even in the absence of symptoms of infection, and especially in endemic regions.