Critical Care Registered Nurse (CCRN) Practice Exam

Which of the following is a possible origin of metastatic tumors seen in the brain?

1. Skin cancer

2. Hematologic malignancies

3. Both skin cancer and lung cancer

4. All of the above

The correct answer is: All of the above

Metastatic tumors in the brain can arise from a variety of primary cancers, with numerous potential origins contributing to their occurrence. Skin cancer, particularly melanoma, is known for its aggressive nature and ability to metastasize to the brain. Hematologic malignancies, such as leukemia and lymphoma, can also lead to central nervous system involvement, including the brain. Lung cancer, which is one of the most common sources of brain metastases, is often associated with a high rate of spread to the brain due to the rich vascular supply and the proximity of the lung's blood circulation to the cranial cavity. The choice indicating that all listed origins—skin cancer, hematologic malignancies, and lung cancer—are possible contributors to brain metastases accurately reflects the multifactorial nature of metastatic spread. These types of cancers are significant due to their prevalence and the propensity to invade distant sites, including the brain, which underscores the necessity for ongoing surveillance and management of patients with these malignancies. Understanding this relationship is crucial for critical care nurses in assessing potential complications and planning appropriate interventions for affected patients.