[Two cases of myelitis associated with Sjögren syndrome without xerosis: characteristic MRI findings].

We report two cases of myelitis associated with Sjögren syndrome without xerosis. Case 1: A 30-year old woman developed dysesthesia on both upper extremities and weakness of the right arm. A T2-weighted MRI examination showed a high-intensity signal and a swollen lesion between the first and seventh cervical vertebral levels. She was diagnosed as having primary Sjögren syndrome based on the positive finding of a Saxon test, typical salivary gland scintigraphy findings, and an elevated anti-SS-A antibody titer. We suspected that her myelitis was associated with Sjögren syndrome and treated her using steroid therapy. Although her symptoms were alleviated, her myelitis relapsed at the same location after the cessation of steroid therapy. Case 2: A 31-year-old woman developed dysesthesia on her neck and both upper extremities and exhibited tonic spasm. A T2-weighted MRI examination showed a high-intensity signal and a swollen lesion between the first and sixth cervical vertebral levels. She was diagnosed as having primary Sjögren syndrome based on the positive findings of a Rose Bengal test, a Schirmer's test, and a Saxon test as well as typical salivary gland scintigraphy findings and elevated titers of anti-SS-A and anti-SS-B antibodies. We suspected that her myelitis was associated with Sjögren syndrome and treated her using steroid therapy. Her symptoms improved after steroid therapy. Based on these two cases, we concluded that MRI findings for myelitis associated with Sjögren syndrome are characterized by a swollen lesion of more than three vertebral segments in length, and the relapse tends to occur at the same location.