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Copyright ©The Author(s) 2015.
World J Surg Proced. Mar 28, 2015; 5(1): 127-136
Published online Mar 28, 2015. doi: 10.5412/wjsp.v5.i1.127
Table 1 Classification of retrorectal tumors
Source of originHistopathology
Congenital orBenignDevelopmental cysts
developmentalDermoid cysts
Epidermoid cysts
Tail gut cysts
Enteric (rectal) duplication
Anterior sacral meningocele1
Teratoma
Adrenal rest tumors
MalignantChordoma1
Teratocarcinoma
InflammatoryGranulomas (foreign body, chronic)
Perineal/pelvirectal abscess or fistula
NeurogenicBenignNeurofibroma
Neurolemmoma (schwannoma)
Ganglioneuroma
MalignantEpendymoma
Ganglioneuroblastoma
Neurofibrosarcoma
OsseousBenignOsteoma Sacral bone cyst
Osteoblastoma
Osteogenic sarcoma
Giant cell tumor
MalignantEwing's tumor
Chondromyxosarcoma
Osteogenic sarcoma
Myeloma
MiscellaneousBenignLipoma
Fibroma
Leiomyoma
Hemangioma
Endothelioma
Desmoid tumor
Lymphangioma
Ectopic kidney
MalignantFibrosarcoma
Liposarcoma
Leiomyosarcoma
Metastatic disease