[Reiter's syndrome in children. Ultramicroscopic study of the synovial membrane].

The clinical picture of a 12 year-old boy with Reiter's syndrome, manifested by conjunctivitis, keratitis, polyarthritis and urethritis, is presented and compared with the other 26 boys and girls with this syndrome that have been reported elsewhere. Light microscopy and inmunofluorescence studies of synovial membrane showed nonspecific changes. However, with the electron-microscope two types of cellular inclusions were seen in both, synovial cells and macrophages. Such changes were similar to those described in adults with Reiter's syndrome.