A 17-year-old high school senior presents to your clinic in acute respiratory distress. Between shallow breaths he states he was at home finishing his homework when he suddenly began having right-sided chest pain and severe shortness of breath. He denies any recent traumas or illnesses. His past medical history is unremarkable. He doesn't smoke but drinks several beers on the weekend. He has tried marijuana several times but denies any other illegal drugs. He is an honors student and is on the basketball team. His parents are both in good health. He denies any recent weight gain, weight loss, fever, or night sweats. On examination you see a tall, thin young man in obvious distress. He is diaphoretic and is breathing at a rate of 35 breaths per minute. On auscultation you hear no breath sounds on the right side of his superior chest wall. On percussion he is hyperresonant over the right upper lobe. With palpation he has absent fremitus over the right upper lobe. What disorder of the thorax or lung best describes his symptoms?

Correct Answer: A

Rationale: The clinical presentation of this 17-year-old high school senior is concerning for a spontaneous pneumothorax. A spontaneous pneumothorax occurs when air enters the pleural space, resulting in lung collapse. Risk factors for spontaneous pneumothorax include tall, thin body habitus and smoking. In this case, the patient's sudden onset of right-sided chest pain and severe shortness of breath, along with absent breath sounds on the right side of the chest and hyperresonance on percussion, are consistent with a pneumothorax. The absence of lung sounds and fremitus on palpation over the right upper lobe further support this diagnosis. Chronic obstructive pulmonary disease (COPD) and asthma typically present with more chronic symptoms, while pneumonia is usually associated with fever, productive cough, and other signs of infection. Given the history and physical examination findings, spontaneous pneumothorax is the most

Correct Answer: B

Rationale: The description of an oval, brown, slightly elevated lesion with a flat surface and rough, wartlike texture on palpation is characteristic of a seborrheic keratosis. Seborrheic keratoses are common benign skin growths that typically occur in older adults. They can vary in color, ranging from tan to dark brown, and often have a waxy or stuck-on appearance. The lesion described does not fit the typical characteristics of actinic keratosis, basal cell carcinoma, or squamous cell carcinoma.

Correct Answer: A

Rationale: The progression of excruciating pain starting under the lower ribs on the right side, then moving to the lateral abdomen, and finally settling in the right lower quadrant is classic for appendicitis. Appendicitis is an inflammation of the appendix, a small tube-like structure attached to the cecum (beginning of the large intestine). The pain typically starts around the umbilicus and then migrates to the right lower quadrant, where the appendix is located. Other symptoms that may accompany appendicitis include fever, nausea, vomiting, loss of appetite, and tenderness at McBurney's point (a specific area in the abdomen). It is a medical emergency that requires immediate attention to avoid complications such as perforation and peritonitis.

Correct Answer: C

Rationale: Peyronie's disease is a condition characterized by the formation of fibrous scar tissue in the penis, leading to the development of plaques or indurations along the shaft of the penis, typically on the ventral surface. These plaques can cause penile curvature, pain, and erectile dysfunction. Urethral stricture, testicular carcinoma, and epidermoid cysts are not typically associated with indurations along the ventral surface of the penis.

Correct Answer: A

Rationale: The clinical presentation of this 17-year-old high school senior is concerning for a spontaneous pneumothorax. A spontaneous pneumothorax occurs when air enters the pleural space, resulting in lung collapse. Risk factors for spontaneous pneumothorax include tall, thin body habitus and smoking. In this case, the patient's sudden onset of right-sided chest pain and severe shortness of breath, along with absent breath sounds on the right side of the chest and hyperresonance on percussion, are consistent with a pneumothorax. The absence of lung sounds and fremitus on palpation over the right upper lobe further support this diagnosis. Chronic obstructive pulmonary disease (COPD) and asthma typically present with more chronic symptoms, while pneumonia is usually associated with fever, productive cough, and other signs of infection. Given the history and physical examination findings, spontaneous pneumothorax is the most

Correct Answer: D

Rationale: Finding a bounding carotid pulse suggests a wide pulse pressure, which can be associated with aortic insufficiency. Aortic insufficiency (also known as aortic regurgitation) is characterized by the backflow of blood from the aorta into the left ventricle during diastole due to incomplete closure of the aortic valve. This results in increased stroke volume and left ventricular pressure, leading to widened pulse pressure and a bounding arterial pulse. Therefore, when a bounding carotid pulse is detected in a patient, it is important to search for signs and symptoms of aortic insufficiency, such as a diastolic murmur heard best at the left sternal border and radiating to the neck.

Correct Answer: D

Rationale: Weight loss can have a significant impact on the health problems associated with obesity. Even a modest weight loss of around 10% can lead to noticeable improvements in conditions such as diabetes, hypertension, osteoarthritis, and obstructive sleep apnea. Encouraging Mr. Curtiss to focus on achieving a meaningful but achievable goal, such as a 10% weight loss, can help him experience positive changes in his health and overall wellbeing, even if his ultimate goal weight seems far away. This approach can also help to boost his motivation and confidence in his ability to make progress towards better health.

Correct Answer: A

Rationale: A murmur heard only at the cardiac apex is most likely due to mitral valve pathology. The mitral valve is located near the apex of the heart, and murmurs related to mitral valve issues are typically best heard at the apex during auscultation. Mitral valve diseases such as mitral valve prolapse, mitral stenosis, or mitral regurgitation can lead to the development of a murmur in this location.

Correct Answer: A

Rationale: The patient in the case presented has multiple moist papules on the penile shaft and corona, which are classic features of condylomata acuminata, also known as genital warts. Condylomata acuminata are caused by the human papillomavirus (HPV) and are typically painless, unlike other conditions such as genital herpes or syphilitic chancre which may be associated with pain or tender sores. Given the patient's history of multiple sexual partners and lack of condom use with his current girlfriend, there is a higher likelihood of exposure to HPV. Condylomata acuminata can be treated with various options including topical agents, cryotherapy, or surgical removal, and it is important to address the potential risk of HPV transmission to sexual partners.