May Be Caused by

 Common

Hamartoma

Hemangioma

Lipoma

Papilloma

Polyp

Spindle cell tumor

Transitional cell carcinoma

Ureteritis cystica

 Uncommon

Endometriosis

Eosinophilic ureteritis

Hematoma

Lymphadenopathy

Malacoplakia

Postoperative state

Renal vein thrombosis

Schistosomiasis haematobium

Tuberculosis

Ureteral metastasis

Varicosities