What manifestation is expected when a person with a spinal cord injury develops autonomic dysreflexia?

Choice A reason: Melena is dark, tarry stool due to upper gastrointestinal bleeding, not greasy or foul-smelling from malabsorption. It results from digested blood, not fat malabsorption, making this choice incorrect for the described diarrhea.

Choice B reason: Small-volume diarrhea is typically due to inflammation, like in inflammatory bowel disease, not malabsorption. It lacks the greasy, foul-smelling quality of fat malabsorption, making this choice incorrect for malabsorption-related diarrhea.

Choice C reason: Steatorrhea is greasy, foul-smelling diarrhea caused by fat malabsorption, common in disorders like celiac disease or pancreatic insufficiency. Undigested fats in stool cause its characteristic appearance and odor, making this the correct choice.

Choice D reason: Osmotic diarrhea results from unabsorbed solutes, like lactose intolerance, causing watery stools, not specifically greasy or foul-smelling. It lacks the fat content of steatorrhea, making this choice incorrect for malabsorption diarrhea.

Choice A reason: Smoking introduces carcinogens like polycyclic aromatic hydrocarbons, damaging DNA and promoting mutations in lung, throat, and other tissues. Chronic exposure increases cancer risk, particularly lung cancer, by disrupting cellular repair mechanisms, making this a correct risk factor.

Choice B reason: Obesity increases cancer risk through chronic inflammation and hormonal imbalances, like elevated estrogen, linked to breast and endometrial cancers. However, it is not listed in the provided options, so it cannot be selected, though it is scientifically relevant.

Choice C reason: Tanning without sunscreen exposes skin to UV radiation, causing DNA damage in melanocytes and increasing melanoma risk. UV-induced mutations disrupt cell cycle regulation, promoting uncontrolled cell growth, making this a correct cancer risk factor.

Choice D reason: Human papillomavirus (HPV) causes cancers like cervical and oropharyngeal by integrating viral DNA into host cells, disrupting tumor suppressor genes. Chronic infection leads to cellular transformation, making this a correct risk factor for specific cancers.

Choice E reason: Family history of cancer indicates genetic predispositions, such as BRCA mutations, increasing risks for breast, ovarian, or other cancers. Inherited mutations impair DNA repair or cell cycle control, making this a correct risk factor for cancer development.