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To demonstrate the diagnostic process of a primary retroperitoneal mature cystic teratoma using percutaneous needle biopsy.

April 27, 2026CureusOpen Access

Primary Retroperitoneal Mature Cystic Teratoma in an Adult Diagnosed Using Percutaneous Needle Biopsy: A Case Report

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To demonstrate the diagnostic process of a primary retroperitoneal mature cystic teratoma using percutaneous needle biopsy.
35-year-old man with a 10-cm retroperitoneal mass detected incidentally.
CT and MRI imaging provided initial suspicious findings.
Ultrasound-guided percutaneous core needle biopsy was performed for histopathological analysis.
Histopathological examination confirmed mature cystic teratoma with no malignant components.
Surgical resection was completed en bloc with the right kidney due to strong adhesions.
Imaging findings were inconclusive, necessitating the use of percutaneous biopsy for accurate diagnosis.

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Case report highlights percutaneous biopsy for diagnosing complex retroperitoneal masses, aiding surgical plans.

Tsukada et al. (2026) studied this question.

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