<unk>  is a rare form of<unk>  that can sometimes involve the bladder, but does not arise from the urothelium and is therefore not bladder<unk>  in the usual sense. The disease arises from malignant transformation of rests of enteric epithelium in the urachus, an embryonic structure located between dome of the bladder and the umbilicus.<unk>  can occur at any site along the<unk>  tract. The most common locations are the umbilicus and the dome of the bladder.<unk>  was first described in 1863 by Hue and Jaequin.
Urachal cancer
Diltor Opromolla
Dacryocystitis
Keratoconus
Laryngocele
Mucocele
Trachoma
Blepharitis