May Be Caused by

Abscess

Achalasia

Adrenal neoplasm

Amyloidosis

Anatomic variant

Bochdalek hernia

Bronchogenic cyst

Chemodectoma

Chordoma

Diffuse idiopathic skeletal hyperostosis

Dilated azygos system

Duplication cyst

Dural ectasia

Esophageal dilatation

Extralobar pulmonary sequestration

Extramedullary hematopoiesis

Extruded disk

Fibromatosis

Ganglioneuroma

Giant cell tumor

Hematoma

Hydatid disease

Hydroureter

Langerhans cell histiocytosis

Leukemia

Lymphadenopathy

Lymphoma

Malignant peripheral nerve sheath tumor

Mediastinal varices

Meningocele

Mesothelioma

Metastasis

Multiple myeloma

Mustard procedure

Neurenteric cyst

Neuroblastoma

Neurofibroma

Osteomyelitis of spine with abscess

Paget disease of bone

Pancreatic neoplasm

Pancreatic pseudocyst

Pheochromocytoma

Pleural effusion

Pleural empyema

Posterior mediastinal neoplasm

Primary vertebral neoplasm

Retrocaval ureter

Retroperitoneal fibrosis

Retroperitoneal neoplasm

Rhabdomyosarcoma

Sarcoma

Schwannoma

Spinal osteoarthritis

Splenosis

Thoracic kidney

Tortuous aorta