Question

marys young child, phillip, was admitted to the hospital due to a nose bleed that would not stop. phillips blood test showed that he lacked clotting factor viii due to a faulty gene on his x - chromosome. what is the most probable diagnosis?

hemophilia a
neurofibromatosis
tay - sachs disease
cystic fibrosis
phenylketonuria (pku)

Explanation:

Hemophilia A is an X - linked recessive disorder. It is caused by a deficiency of clotting factor VIII. Symptoms include excessive bleeding (such as a nosebleed that won't stop). Neurofibromatosis is a disorder affecting the nervous system with symptoms like skin changes and tumors. Tay - Sachs disease is a genetic disorder affecting the nervous system with symptoms like developmental regression. Cystic fibrosis affects the lungs and digestive system with symptoms like thick mucus. Phenylketonuria (PKU) is a metabolic disorder where the body can't process phenylalanine.

Answer:

Hemophilia A