Case report examines rare intratesticular fetus in fetu in undescended testis, suggesting unique clinical implications.
INTRODUCTION: Fetus in fetu (FIF) is a rare congenital anomaly. The most common location of FIF is the retroperitoneum. FIF of testicular origin is extremely rare, with only 9 cases reported previously. We present a case of intratesticular FIF within an intra-abdominal undescended right testis and review previously reported cases to discuss the possibility of intratesticular FIF.
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Numano et al. (2026) studied this question.
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