Myositis in primary Sjögren's syndrome. Report of 3 cases.
OBJECTIVE
To describe the findings and course of myositis in primary Sjögren's syndrome (SS).


METHODS
We studied myositis in SS when clinically indicated. Of 104 patients with SS, we identified 3 cases. In all, the diagnosis was made according to clinical data, biochemical, electromyographic and biopsy criteria. Other autoimmune diseases were excluded.


RESULTS
We found a prevalence of 3% of myositis secondary to SS. There were no significant associations between myositis and other clinical or laboratory variables.


CONCLUSIONS
Although rare, myositis must be considered a part of the spectrum of SS. In our experience, treatment with steroids and immunosuppressive drugs was successful.
Kraus
A
A
Department of Immunology & Rheumatology, Instituto Nacional de la Nutrición Salvador Zubirán, Mexico City, Mexico.
Cifuentes
M
M
Villa
A R
AR
Jakez
J
J
Reyes
E
E
Alarcón-Segovia
D
D
D000328:Adult; D001706:Biopsy; D005260:Female; D006801:Humans; D008875:Middle Aged; D009132:Muscles / Q000473:pathology; D009220:Myositis / Q000175:diagnosis / Q000209:etiology* / Q000473:pathology; D012859:Sjogren's Syndrome / Q000150:complications*