[A male case of primary Sjögren's syndrome with interstitial pneumonitis and interstitial tubulo-nephritis in the absence of dry eye and dry mouth: parotid gland MRI is a useful diagnostic method for Sjögren's syndrome]

N Takamura, K Eguchi, K Migita, T Tsukada, A Mizokami, T Origuchi, S Nagataki, M Izumi, T Nakamura
Nihon Rinshō Men'eki Gakkai Kaishi, Japanese Journal of Clinical Immunology 1995, 18 (1): 123-32
Here we report a case of primary Sjögren's syndrome with hilar lymphadenopathy, interstitial pneumonitis and interstitial tubulo-nephritis. A 60-year old man was admitted to our hospital in May 1993 because of general fatigue and fever. He was noted to have hypergammaglobulinemia and had positive antibodies to nuclear antigens since 1990 in the absence of clinical manifestations. Since 9 months before admission, he presented with general fatigue, low grade fever and uveitis. On admission, chest X-ray and CT scan showed bilateral hilar lymphadenopathy and interstitial pneumonitis. The negative results for both serum angiotensin converting enzyme and histological findings of the cervical lymph node and the lung excluded the diagnosis of sarcoidosis. Serological examination exhibited marked elevation of polyclonal IgG level and anti-nuclear antibody, but neither anti-SS-A (Ro) nor anti-SS-B (La) antibody was detected. He did not have symptoms of xerophthalmia and xerostomia. Keratoconjunctivitis sicca was diagnosed by positive Schirmer's and rose bengal tests. His labial gland biopsy demonstrated severe mononuclear cell infiltration around the ducts. MRI findings of the parotid glands revealed heterogeneous and dotted high signal intensity similar to those in fat tissues in the T1- and T2-weighted images. These findings depicted that bilateral parotid gland was extensively destructed and was replaced by lipid tissue. Renal biopsy showed interstitial tubulo-nephritis. On the basis of the above findings, he was diagnosed to have primary Sjögren's syndrome and uveitis. Therefore, MR image of the parotid gland is considered to be a noninvasive and useful method for diagnosis of Sjögren's syndrome.

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