They present over a wide age range (birth to about 65 years), but within the head and neck region, about 50% of cases develop in patients younger than 15 years of age. Within the head and neck, males are affected about 2–3 times more often than females.
Fetal rhabdomyoma
Fetal adenocarcinoma
Uremic fetor
Fetal trimethadione syndrome
Gestational choriocarcinoma
Mixed Müllerian tumor
Heterotopic pregnancy
Embryoma