Sacrococcygeal yolk sac tumor presenting as subcutaneous fluid collection initially treated as abscess.

Malignant extragonadal germ cell tumors, though more common in infants and children, are rare. They occur in the body's midline and may have internal and external manifestations. We report a case of an 11-month-old female with sacrococcygeal extragonadal yolk sac tumor manifesting as a draining subcutaneous nodule after initial treatment as an abscess. Extragonadal germ cell tumors can present with external manifestations confusingly similar to other more benign soft tissue conditions.