Frank is a 24-year-old man who presents with multiple burning erosions on the shaft of his penis and some tender inguinal adenopathy. Which of the following is most likely?

Correct Answer: B

Rationale: The presentation of multiple burning erosions on the shaft of the penis along with tender inguinal adenopathy is indicative of genital herpes caused by the herpes simplex virus (HSV). Primary herpes simplex infection typically presents with painful ulcers and lymphadenopathy. The ulcers are often shallow with well-defined borders and can be associated with systemic symptoms such as fever and malaise. In contrast, primary syphilis is characterized by a painless chancre at the site of infection, usually on the genitals. Chancroid can also present with painful ulcers, but it is less common in developed countries. Gonorrhea typically presents with urethral discharge, dysuria, or other symptoms of urethritis, rather than erosions on the penis shaft.

Correct Answer: D

Rationale: The given symptoms of distant air sounds, late inspiratory crackles in both lower lobes, distant S1 and S2 heart sounds, and an S3 heart sound heard over the apex are all characteristic findings of left-sided heart failure. Distant air sounds and late inspiratory crackles indicate pulmonary congestion due to fluid accumulation in the lungs as a result of left-sided heart failure. The distant heart sounds and presence of an S3 are signs of left ventricular dysfunction. In contrast, pneumonia would typically present with more localized abnormal breath sounds and other symptoms such as fever and productive cough. Chronic obstructive pulmonary disease (COPD) would manifest with prolonged expiratory phase and wheezing, not late inspiratory crackles. Pleural pain is typically associated with sharp chest pain exacerbated by breathing movements, and it does not explain the constellation of symptoms described in this case. Therefore, the most likely diagnosis based on the provided symptoms

Correct Answer: C

Rationale: The information provided pertains to the patient's educational background, living situation, family status, and work activities. This type of information falls under the personal and social history category, as it provides important context about the patient's lifestyle, living conditions, and social support network. Personal and social history is essential for understanding the patient's overall well-being and can impact their health and healthcare needs.

Correct Answer: D

Rationale: HPV (human papillomavirus) infection is a very common sexually transmitted infection (STI) that can affect both men and women. It is the most common STI in the United States. While most cases of HPV infection are asymptomatic and resolve on their own, certain high-risk strains of HPV can lead to the development of various cancers, including cervical cancer. Therefore, HPV infections do cause a small but important number of cervical cancers, making option D the correct choice. Regular screening, such as Pap smears and HPV testing, are crucial for early detection and effective management of HPV-related abnormalities that could progress to cervical cancer.

Correct Answer: B

Rationale: Research studies have shown that for every increment of 20 mm Hg in systolic blood pressure and 10 mm Hg in diastolic blood pressure, the cardiovascular risk approximately doubles. Therefore, the cardiovascular risk increases by 50% for each increment of 20 mm Hg systolic and 10 mm Hg diastolic in blood pressure. This underlines the importance of maintaining healthy blood pressure levels to reduce the risk of cardiovascular diseases.

Correct Answer: D

Rationale: A rectal polyp is a growth that originates from the inner lining of the rectum and protrudes into the rectal canal. It may present as a soft, smooth, nontender mass on digital rectal examination. Rectal polyps are usually benign, but some may have the potential to become cancerous if left untreated. Therefore, it is important to evaluate and remove polyps to prevent complications. In this case, the description of a pedunculated mass on the posterior wall of the rectum is most suggestive of a rectal polyp.

Correct Answer: C

Rationale: Marion's presentation of back pain associated with constipation and urinary retention is concerning for cauda equina syndrome. Cauda equina syndrome is a rare but serious condition caused by the compression of the bundle of nerves at the bottom of the spinal cord, known as the cauda equina. This compression can result in a variety of symptoms, including back pain, sciatica, changes in bowel and bladder function (such as constipation and urinary retention), as well as lower extremity weakness or numbness.

Correct Answer: A

Rationale: When crackles, wheezes, or rhonchi clear with a cough, it is suggestive of bronchitis. Bronchitis is inflammation of the bronchial tubes, often due to a viral infection, leading to the production of excess mucus. The characteristic sounds such as crackles, wheezes, or rhonchi can be heard on auscultation due to the presence of mucus in the airways. The act of coughing helps to clear the mucus from the airways, resulting in the temporary resolution of these abnormal sounds. In contrast, asthma, cystic fibrosis, and heart failure are not typically associated with crackles, wheezes, or rhonchi that clear with a cough.

Correct Answer: A

Rationale: In order to listen carefully for S splitting, one should use the diaphragm with light pressure over the 2nd right intercostal space. S splitting refers to a split of the second heart sound (S2) into its two components - A2 and P2. The A2 component is normally heard as the main heart sound when the aortic valve closes, and the P2 component is heard when the pulmonic valve closes. By placing the diaphragm lightly over the 2nd right intercostal space, one can best auscultate the aortic area and listen for the timing and splitting of the S2 components. Using the bell or applying firm pressure may not allow for optimal detection of S splitting in this specific case.