| Summary: | Introduction
Leydig cell tumors (LCTs) comprising of 1 to 3 percent of testicular cancers in children, one of the single most common symptoms in prepubertal patients is painless testicular swelling with or without a sign of precocious puberty. Other symptoms depend on age and the type of tumor. The tumor is usually asymptomatic if secrets androgens can cause precocious puberty in young children. If the tumor secretes estrogens, it can cause rarely gynecomastia in young boys.
Case presentation
Here we are reporting pure LCTs in a ten-year-old boy presented with gynecomastia. His height and weight were in the normal range. Differential diagnosis of large cell calcifying Sertoli cell or Leydig cell tumor, teratomas and revealed the normal size and echogenicity of both epididymis confirmed the Leydig cell tumor.
Conclusions
Due to the extremely variable clinical presentation of tumors especially in children and the importance of maintaining fertility in this group and the increased incidence of malignancy, especially in adolescence early detection and timely treatment are crucial.
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