Neurinoma nell’ileopsoas con grave osteolisi di LII

Schwannoma is a benign neoplasm, or amarthoma for some authors, consisting of Schwann cells. The presentation can be asymptomatic or, more frequently, painful due to nerve compression. A retroperitoneal localization, particularly inside the ileopsoas muscle, is very rare. The aim of this article was to define different presentations and treatments for psoas schwannomas through a case report analysis. Authors present the analysis of a case of a schwannoma localized in the ileopsoas muscle surgically treated with en bloc excision, double surgical access and posterior vertebral stabilization. A review of literature was made using Pubmed, Ovid, Scirus; keywords used for the search were: neurinoma, schwannoma, retroperitoneal, psoas, in different combinations. Inclusion criteria for the search were the English, French, Italian language of the articles; no restriction was posed for the type of paper. The diagnosis and treatment of retroperitoneal schwannomas that have grown inside the psoas muscle have been evaluated in 9 case reports, with brief literature reviews. A neurinoma localized in the ileopsoas is a rare neoplasm and diagnosis is often accidental. The surgical approach is invasive and may be performed through laparotomic exploration, or double surgical access, depending on the structures involved; frequently peripheral nervous deficits persist. Ileopsoas schwannoma treatment is difficult and cannot be standardized; adequate preoperatory staging and treatment in a specialized reference centre are mandatory