Tailgut cyst: A case report in a 9-month-old infant

INTRODUCTIONTailgut cysts or retrorectal cystic hamartomas are rare developmental anomalies that are believed to arise from the embryonic hindgut.PRESENTATION OF CASE9 months old male infant was presented with swelling in the right gluteal region. MRI lumbo-sacral spine showed well defined round to oval lesion which is brightly hypertense on T2W1 and hypotense on T1W1 posterior to sacrum and coccyx with no evidence of connection to the thecal sac indicating cyst. Complete excision of the cyst was done. Histopathology report shows cyst wall partially lined with stratified squamous epithelium and cyst wall shows spaces lined by cuboidal epithelium and nerve bundles with no evidence of malignancy suggestive of tailgut cyst.DISCUSSIONTailgut cysts are rare congenital anomalies. Most commonly located in the retrorectal space. They are thought to be derived from the remnants of the embryonic hindgut. Age ranges from 4 to 73 years but an average presentation is at 35 years. Female to male ratio is 3:1. MRI is a good diagnostic tool for diagnosis of tailgut cyst. Complete surgical excision is the treatment of choice as this provides a definite diagnosis and prevents possible complications such as infection, fistula formation and malignant degeneration.CONCLUSIONThe aim of presenting this case is its rarity. Complete surgical excision is the treatment of choice. Preoperative imaging with MRI is essential to plan the most appropriate surgical approach.     

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