Diagnostic challenge: Bethlem myopathy mimicking inflammatory myopathy Olga Rusinovich-Lovgach; Luz Morán; Oscar Toldos-Gonzalez; Marta Vaquero Martínez; Borja Cabal-Paz; José Luis Andréu Sánchez;

Does sacroiliitis is a mandatory criterion for enthesitis-related arthritis diagnosis? Hanene Lassoued Ferjani; Lobna Kharrat; Dorra Ben Nessib; Dhia Kaffel; Kaouther Maatallah; Wafa Hamdi;

Ultrasound tenosynovitis: A differential feature of patients with seronegative rheumatoid arthritis Santiago Ruta; Einer Sanchez Prado; Facundo Salvatori; Juan Arguello; Darío Aguerre; Sebastián Magri; Rodrigo García Salinas;