A 69-year-old woman with a history of infective endocarditis and a penicillin allergy presents with an ill-fitting complete denture. Under the denture there is an asymptomatic, erythematous, cobblestone-like lesion of the hard palate mucosa, and ridge bone resorption is apparent. Evaluate the two statements: The patient's medical history requires antibiotic prophylaxis before dental procedures. Splinter hemorrhages under fingernails are a common finding in patients with infective endocarditis.