Sarcoidosis como espondiloartropatía seronegativa.

Two cases were presented with initial symptoms of inflammatory low back pain and alternate buttock pain. They developed a progressive dyspnea with bilateral mediastinal and hiliar lymphadenopathy and pulmonary interstitial disease as visualized with chest CT scan. Sarcoidosis diagnosis was confirmed by biopsy in both cases--in one case by skin biopsy and in the other by open lung biopsy. These clinical forms of spondyloarthropathy and sarcoidosis were unusual and were compared with similar cases present in the literature.Presentamos dos casos de dolor lumbar de tipo inflamatorio y dolor alternante en nalgas, que desarrollaron disnea progresiva con adenopatías mediastinales e hiliares y signos de enfermedad pulmonar intersticial a la tomografía de tórax. El diagnóstico de sarcoidosis se confirmó con biopsia cutánea en un caso y con biopsia pulmonar a cielo abierto en el otro. Se discute esta forma inusual de presentación de estas dos patologías y se revisan los casos similares de la literatura