ATI Oncology Questions

Correct Answer: B

Rationale: Malignant (cancer) cells often express tumor-specific antigens (TSAs), which are proteins or markers on the surface of cancer cells that are not found on normal cells. These antigens are produced due to genetic mutations in cancer cells and can sometimes be used to help the immune system recognize and attack cancerous cells. Tumor-specific antigens play a key role in cancer diagnosis, monitoring, and targeted therapies.

Correct Answer: C

Rationale: Patients with myelodysplastic syndrome (MDS) have a dysfunctional bone marrow that leads to ineffective blood cell production, including white blood cells, which are crucial for fighting infections. As a result, they are at high risk for infections. Even a slight elevation in temperature, such as 37.5�C (99.5�F), could be an early sign of infection in an immunocompromised patient. Early detection and treatment of infections are critical in MDS patients, as infections can quickly become severe or life-threatening due to their compromised immune system.

Correct Answer: D

Rationale: Acute Lymphocytic Leukemia (ALL) is a type of cancer where immature lymphocytes (a type of white blood cell) proliferate uncontrollably in the bone marrow. This leads to a reduction in the production of platelets, leukocytes, and erythrocytes, causing symptoms such as fatigue, anemia, bleeding tendencies, and increased susceptibility to infection. In ALL, leukemic cell infiltration into other organs is common, which can manifest as severe headaches (due to central nervous system involvement), vomiting, and testicular pain (due to infiltration of leukemic cells into the testes). These are hallmark signs of ALL, especially in younger patients.

Correct Answer: B

Rationale: Chemotherapy targets rapidly dividing cells, which include both cancerous and healthy cells, such as those in the bone marrow, hair follicles, and the lining of the digestive tract. Since the bone marrow produces immune cells (white blood cells), chemotherapy can weaken the immune system by reducing the body's ability to produce these cells, making patients more susceptible to infections. This is why close monitoring and supportive measures to protect immune function are important during chemotherapy treatment.

Correct Answer: B

Rationale: Induction therapy for acute myeloid leukemia (AML) involves intensive chemotherapy aimed at achieving remission by eliminating a large number of cancerous cells. However, this aggressive treatment also severely reduces the production of healthy blood cells, including neutrophils, which leads to neutropenia (a dangerously low number of neutrophils). This makes the patient highly susceptible to infections, which can be life-threatening. Monitoring for signs of infection is critical during this phase, as infections may occur quickly and progress rapidly due to the compromised immune system. Early detection and prompt treatment of infections are vital to improving patient outcomes during induction therapy.