Extragonadal germ cell tumours known as primary yolk sac tumours are frequently diagnosed in adolescents and young adults. Men are more likely to have them. Germ cell tumours are categorised as seminomas and non seminomatous tumours based on their histological features. A mediastinum Extragonadal yolk sac tumour is the least common type of NSGC. The clinical signs and symptoms are vague and can mimic those of other chronic illnesses like various cancers or tuberculosis, including chest pain, vena cava superior syndrome, fever, weight loss, and chronic cough. The results of immunohistochemistry for pan-cytokeratin and alpha-fetoprotein were favourable. Because brain metastases are uncommon, there is little information available about their clinical signs and symptoms, anatomical locations, and characteristics. But the metastatic brain process produced histology results that were comparable to those of the originating site. Added radiological and laboratory examinations can conducted to find more metastatic mechanisms. There is currently no clear standard of care for treating primary mediastinal sac tumours with brain metastases.
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