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Retroperitoneal shwannoma: A case report.

Mohamed Amine Lamris^1,2, Othmane El Yamine^1,2, Saad Rifki El Jay^1,2

¹Surgical Department of Cancerology and Liver Transplantation University Hospital Center, Casablanca, Morocco.

Annals of Medicine and Surgery (2012)

|October 25, 2021

Summary

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Retroperitoneal schwannomas are rare peripheral nerve sheath tumors. Diagnosis is challenging due to nonspecific symptoms, often requiring surgical resection for definitive histopathologic confirmation.

Area of Science:

Oncology
Surgical Pathology
Radiology

Background:

Schwannomas, tumors of peripheral nerve sheath cells, rarely occur in the retroperitoneum (3% of all cases).
Preoperative diagnosis of retroperitoneal schwannomas is difficult due to asymptomatic presentation or nonspecific symptoms.
While typically benign, schwannomas carry a risk of malignant transformation.

Observation:

A 25-year-old woman presented with a 2-year history of abdominal pain and a palpable 10 cm mass.
Imaging revealed a large, well-defined, heterogeneous retroperitoneal mass and a separate ovarian cyst.
Surgical resection of the retroperitoneal mass and right ovariectomy were performed.

Findings:

Histopathological examination confirmed the retroperitoneal mass as a schwannoma.

Keywords:

Case report Retroperitoneal Schwann cells Schwannomas

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The ovarian mass was identified as a serous cystadenoma.

Diagnosis was often fortuitous and late, with imaging findings being typically non-diagnostic.

Implications:

Complete surgical excision is the primary treatment for retroperitoneal schwannomas.
Despite a generally good prognosis, long-term follow-up is essential due to recurrence and malignant transformation risks.
This case highlights the diagnostic challenges and management of rare retroperitoneal schwannomas.