RT Journal Article SR Electronic T1 Infliximab treatment for resistant Achilles tendonitis JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 1228 OP 1230 VO 30 IS 9 A1 Al-Asfar, Said M. A1 Attar, Mohammad A1 Shacfeh, Hasan YR 2009 UL http://smj.org.sa/content/30/9/1228.abstract AB Undifferentiated spondyloarthropathies USPA can sometimes be refractory to usual disease modifying agents. Anti-tumor necrosis factor TNF-alpha agents have been shown to be effective in spondyloarthropathies. Few articles described the efficacy of TNF-alpha antagonists in USPA. Our patient had refractory Achilles tendonitis as an early manifestation of USPA which responded dramatically to infliximab treatment.