Question

multiple choice question
expansile, aka \blowout,\ metastasis is most likely caused by which of the following primary carcinomas?
please select your answer...
a brain
b bowel
c liver
d thyroid

Explanation:

Expansile ("blowout") metastases are characterized by aggressive, bone-destructive growth that expands the bone cortex. Thyroid carcinomas, particularly follicular thyroid cancer, often produce this type of metastasis due to their highly osteolytic growth pattern. Other listed primary cancers typically form different metastasis patterns (e.g., brain cancers rarely metastasize outside the CNS, bowel/liver metastases are more commonly visceral).

Answer:

D. thyroid