RT Journal Article SR Electronic T1 An unique and unusual lucent shadow seen on a plain x-ray abdomen anteroposterior view in erect position. JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 302 OP 304 VO 28 IS 2 A1 Toke, Satyawan P. YR 2007 UL http://smj.org.sa/content/28/2/302.abstract AB