Which tumor type is commonly associated with MEN2A?

The tumor type commonly associated with Multiple Endocrine Neoplasia type 2A (MEN2A) is pheochromocytoma. MEN2A is a genetic condition characterized by the development of neoplasms in various endocrine glands, and pheochromocytoma is one of the hallmark tumors associated with this syndrome.

Pheochromocytomas are tumors of the adrenal medulla that secrete catecholamines, which can lead to symptoms such as hypertension, palpitations, and anxiety. The presence of pheochromocytoma in patients with MEN2A is of significant clinical importance as it can precede the diagnosis of medullary thyroid carcinoma and primary hyperparathyroidism, which are also part of this syndrome.

The other options listed do not have the same established connection with MEN2A. Wilms tumor is a pediatric kidney cancer that typically occurs in children and is not related to MEN2A. Lung cancer and hepatocellular carcinoma are both common types of cancer but have no specific association with MEN2A. Therefore, pheochromocytoma stands out as the correct and relevant tumor type linked to this genetic syndrome.