Retroperitoneal ancient schwannoma: case report and analysis of clinico-radiological findings

Retroperitoneal ancient schwannoma presenting as an adrenal incidentaloma: CT and MR findings

“…A CT-guided fine needle aspiration biopsy has been reported to be inaccurate and unreliable [17,18]. Therefore, complete surgical resection is recommended since malignancy cannot be excluded by preoperative or perioperative analyses [10]. A minimally invasive approach using an endoscopic laparotomy was described recently [19]; it was used in the present case.…”

“…However, reports of the radiologic features of retroperitoneal ancient schwannomas are very sparse. Loke et al [9] and Giglio et al [10] reported cases of retroperitoneal ancient schwannoma, including ultrasound and CT features, and noted that the tumors appeared as a well-defined complex cystic mass on ultrasonographic images but presented as a well-circumscribed complex cystic mass with or without septations on CT images. Nakano et al [11] reported on 11 cases of retroperitoneal ancient schwannoma and described ultrasonographic, CT and MRI features that were not different from those of ordinary retroperitoneal schwannomas, although internal heterogeneity was more frequently observed in the ancient retroperitoneal schwannoma cases.…”

Retroperitoneal Schwannoma: Case Series and Literature Review

“…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. 3,19 Others believe that because this is a benign mass, a simple enucleation or partial excision of the tumor is sufficient and have reported no increase in the size of schwannoma during a 6-and 14-year period. 20,21 The argument here is that the morbidity associated with resection of adjacent tissue would not be justified in the treatment of a benign lesion.…”

Ancient schwannoma of the median nerve-a case report and review of the literature of nerve tumors

“…Ancient schwannoma is commonly located deep in the head and neck regions [4,5],Thorax [6] retro peritoneum [7,8],pelvis [9] and extremities [10,11] of elderly patients. Ackerman and Taylor in 1951 described ancient schwannoma with clear areas of hypo cellular tissues due to the long standing degenerative changes attributed to the growth and "aging" of the tumor hence called ancient schwannoma.…”