A 2 year old boy developed acute cerebellar ataxia in association with erythema infectiosum. During the disease, genomic DNA and antibodies against human parvovirus B19 were detected in serum but not in cerebrospinal fluid. Parvovirus B19 associated acute cerebellar ataxia might occur due to transient vascular reaction in the cerebellum during infection. (Arch Dis Child 1999;80:72-73) Keywords: acute cerebellar ataxia; erythema infectiosum; human parvovirus B19 Although human parvovirus B19 (PVB19) is well known to cause erythema infectiosum, it also has other pathological manifestations such as aplastic crisis, thrombocytopenia, purpura, myocarditis, and arthritis. In central nervous system (CNS) disease, meningitis and encephalitis have been reported in association with this viral infection, but acute cerebellar ataxia has not previously been documented. We report a case of acute cerebellar ataxia associated with PVB19 infection.
Case reportA 2 year old boy presented to his physician because of frequent vomiting. He was diagnosed with cyclic vomiting and received intravenous fluids. Over the next day he developed truncal ataxia and nystagmus, resulting in an inability to walk and to maintain a sitting position. On the fourth day he was seen in our hospital with bright red erythema on both cheeks and a maculopapular lacy erythema on his extremities. The rash subsided two days later although he still had mild ataxic gait and horizontal nystagmus. As the patient was not cooperative, detailed neurological examinations was diYcult except for patellar tendon reflexes, which were normal. He was diagnosed with acute cerebellar ataxia. A toxicology screen was not performed, and there was no recent history of vaccination or drug intoxication.White blood cell count was 8.0 × 10 9 /l, with 42.5% polymorphs, 2% eosinophils, 1.5% basophils, 6% monocytes, and 48% lymphocytes. C reactive protein was 0.1 mg/dl and erythrocyte sedimentation rate was 9 mm in the first hour. Cerebrospinal fluid (CSF) was normal with cell count 9/µl, protein 8 mg/dl, and glucose 65 mg/dl. Oligoclonal bands were not found and myelin basic protein was < 0.5 ng/ml in CSF. Serum electrolytes and urinary analysis by the stick test and microscopy were normal. Serology was negative for antibodies to varicella zoster virus, coxsackie B1, B2, B3, B5 viruses, and Mycoplasma pneumoniae. IgM and IgG antibodies against PVB19 were positive at a standard dilution of 1:200 in serum but negative at four dilution points between 1:50 and 1:400 in CSF. PVB19 DNA investigated by polymerase chain reaction (PCR) 1 was also positive in serum but negative in CSF. Nested PCR using six diVerent primer sets revealed that the strain of PVB19 in our case was not a special variant virus. Magnetic resonance imaging (MRI) and single photon emission computed tomography (SPECT) performed on days 8 and 10 after presentation respectively showed no abnormal findings. An electroencephalogram on day 10 was also normal. Therefore, this case was thought to be acute cerebellar a...