[Fever, tetraparesis and confusion - neurological phenomena in influenza].

In this case study, we present an unusual course of a 40-year-old patient with clinical signs of a viral infection with leading gastrointestinal symptoms. In the short term, he developed a progressive ascending sensorimotor tetraparesis with autonomic symptoms as well as qualitative disturbance of consciousness and the need for intensive medical care. Imaging revealed transverse myelitis and a diffusion disorder of the splenium (so-called CLOCC lesion). A diagnosis of "mild encephalopathy with reversible splenial lesion (MERS)" and "longitudinally extensive transverse myelitis (LETM)" was made. An influenza B infection was diagnosed as the causative disease. This is an immunologically triggered pathogenesis. Immunosuppressive therapy indicated.