Mixed Teratoma and Yolk Sac Tumor, Prepubertal Type
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Prepubertal-type mixed non-seminoma; Type I germ cell tumor of the testis
A germ cell tumor not associated with GCNIS or 12 amplification with morphological features of prepubertal-type teratoma and prepubertal-type yolk sac tumor.
These tumors are rare occurring less than one tenth as common as prepubertal-type yolk sac tumors with an estimated incidence of 2–3 cases per 10 million children. Most of these tumors occur as lumps discovered by the parents or patients, with most common presentation occurring as a painless scrotal mass (Nistal and González-Peramato 2016).
It occurs among 0–5-year-old children.
Mixed prepubertal-type GCTs have the same excellent prognosis as prepubertal-type YST, with a survival of 100%.
The tumors are solid, yellow to tan, with foci of cystic changes filled with keratinous or mucoid material, showing calcification or bone formation.