Figure 1: Key steps of reconstructing FCS (the yellow arrow) in the ONLAY procedure. (a) The side view before operation. (b) The inner preputial flap. (c) Dissecting the glans wings with own corpus spongiosum after cutting off the FCS. (d) ONLAY urethroplasty. (e) Suturing the original FCS at the midline to cover the new urethra at the coronal sulcus. (f) The side view afteroperation. FCS: forked corpus spongiosum; ONLAY: onlay island flap.