Treatment of Multiple Endocrine Neoplasia Type 2B with Central Nervous System Metastases in Metastatic Medullary Thyroid Carcinoma

This protocol addresses Multiple Endocrine Neoplasia Type 2B (MEN2B) in the setting of metastatic medullary thyroid carcinoma complicated by brain metastasis and neurologic symptoms. Patients presenting with widespread metastases and neurological symptoms require evaluation for central nervous system involvement, which significantly shapes the management approach.

Brain metastases with associated neurologic symptoms define this sub-population. The extent and distribution of intracranial disease are key determinants of the therapeutic strategy — distinguishing patients with isolated lesions from those with multiple sites of CNS involvement.

Management involves localized interventions directed at intracranial disease — encompassing both surgical and radiation-based modalities — with the specific choice depending on the pattern of brain involvement. The full decision pathway, selection criteria, and complete regimen details are available in the structured protocol.