Primary orbital yolk sac tumor with extra-orbital spread: rare case and review of literature.

Primary orbital yolk sac tumor (YST) is an uncommon extragonadal germ cell tumor (GCT). It presents variably, and most commonly with proptosis. Few cases of orbital yolk sac tumor have been reported in the literature; however, cases with extra-orbital spread and intracranial extension are rare. Histopathology is crucial for timely detection and early management to reduce morbidity and mortality. This case highlights the importance of early diagnosis and multidisciplinary intervention for a successful outcome in a rare case of orbital yolk sac tumor with extra-orbital spread.