Retroperitoneal neurilemmoma

Retroperitoneal Schwannoma: Case Series and Literature Review

“…3,16 Some argue for complete surgical excision that may include, if necessary, the sacrifice of adjacent tissue and viscera. 3,4,17 It is argued that the local recurrence rate ranges from 16% to 54% after conservative intralesional enucleation. 18 Additionally, because malignancy cannot be excluded accurately preoperatively or even intraoperatively with frozen section analysis, complete surgical resection so as to attain negative margins is recommended.…”

Presacral Solitary Giant Neurofibroma Without Neurofibromatosis Type 1 Presenting as Pelvic Mass. Case Report.

“…29,36) The most common symptom of retroperitoneal tumors is poorly localized pain which may be referred to the genitalia or lower extremities, often accompanied by numbness and tingling 18,28) and occasionally urinary symptoms. 23) Recovery may take several months after release of the compression, as in our case. 35) Radiological investigation and differential diagnosis of retroperitoneal NST is very difficult, as the differential diagnosis is between neurofibroma and neurofibrosarcoma for a large dumbbell tumor.…”

“…32) The sex distribution is equal in all. 23) The rarity of pelvic neurofibroma, even in association with NF1, may be due to the silent nature of these tumors, as there is usually very little neurological deficit. However, these tumors unlike their peripheral counterparts may reach a considerable size and occupy an unusual position, compressing the contiguous structures and causing severe pain.…”

“…12,39) Malignant transformation is unlikely in patients without NF1, so simple enucleation or even partial excision and nerve salvage has been advocated. 6,23) However, incomplete tumor removal may be followed by local recurrence 23,28) or malignant transformation of the residual tumor. 18) Therefore, complete surgical resection is the treatment of choice for retroperitoneal NSTs.…”

Retroperitoneal Schwannoma Extending into the Intravertebral Foramen

“…However, in some cases, the surgical procedure carries the hazard of severe nerve impairment which can result in motor and sensory deficits. In such cases, simple enucleation or even partial excision has been advocated [2,3]. We chose tumor enucleation because: (1) complete removal of the tumor could not be achieved without damaging important nerves; (2) the clinicopathological preoperative diagnosis was benign schwannoma; and (3) no recurrences have been reported in cases in whom benign tumors have been enucleated [4,5].…”