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Case Reports
. 2022 May 12;11(5):20584601221102822.
doi: 10.1177/20584601221102822. eCollection 2022 May.

Pelvic schwannoma in an adult male

My Hanh Thi Dau  1 , Me Tam Thi Tran  1 , Hoang Quan Nguyen  1 , Kim Yen Thi Vo  1 , Thanh Tam Thi Nguyen  2 , The Huan Hoang  3 , Van Trung Hoang  3 , Duc Thanh Hoang  4
Affiliations
Case Reports

Pelvic schwannoma in an adult male

My Hanh Thi Dau et al. Acta Radiol Open. .

Abstract

Schwannomas are benign nerve sheath tumors that are generally encapsulated and commonly detected in the head, neck, and mediastinal regions. Schwannomas localizing in the pelvis are extremely rare and tend to be asymptomatic initially due to slow growth rate. Schwannomas may be misdiagnosed as urologic or gynecologic tumors. Pelvic schwannomas are typically solitary, large, and well-circumscribed masses in the retroperitoneum or presacral areas. Other imaging characteristics are cystic degeneration, repeated hemorrhages, and calcifications. Calcification patterns can be punctate, speckled, curvilinear, or along the walls of the masses. We report a young man with a pelvic schwannoma with typical imaging features.

Keywords: Computed tomography; neurilemmoma; pelvic tumor; peripheral nerve sheath tumor; schwannoma.

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Conflict of interest statement

Declaration of conflicting interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Figures

Figure 1.
Figure 1.
Ultrasound images show a complex cystic lesion with internal septa (arrows), cystic (red asterisks), and solid (blue asterisks) components in the left hemipelvis.
Figure 2.
Figure 2.
CT images before (a) and after (b) contrast administration show a well-defined, heterogeneously enhancing mass with cystic areas (asterisks), hemorrhage (arrowheads), and small foci of calcification (circles) in the left lateral pelvis space.
Figure 3.
Figure 3.
MRI on T2-weighted image (a) and T1-weighted image (b) shows a well-defined, complex cystic lesion with hemorrhage (arrowheads), internal septa (arrows), and solid components (blue asterisks) in the left hemipelvis, and fat-saturated T1-weighted postcontrast (c) reveals heterogeneous enhancement of the internal septa and solid components.
Figure 4.
Figure 4.
Photograph of the gross specimen.
See this image and copyright information in PMC

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