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: A

Rationale: Anisocoria refers to a condition where the pupils are of unequal size. Pathologic causes of anisocoria can include conditions such as Horner's syndrome. Horner's syndrome is a rare disorder caused by damage to the sympathetic nerves of the face and eye. Symptoms can include a constricted pupil (miosis), drooping of the upper eyelid (ptosis), and decreased sweating in the affected area. This results in anisocoria, where the affected pupil is smaller than the unaffected pupil. Other options listed (B-D) do not typically lead to pathologic anisocoria.

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 point of maximal impulse (PMI), also known as the apical impulse, is the point where the left ventricle is closest to the chest wall. Normally, the PMI is located in the left 5th intercostal space, around 7 to 9 cm lateral to the sternum. This area corresponds to the apex of the heart. By palpating the PMI, healthcare providers can assess the size, strength, and regularity of the heart's contractions, which can provide important diagnostic information about cardiac health. Locating the PMI accurately is essential for physical examination and diagnosis of cardiac conditions.

Correct Answer: A

Rationale: The presence of a firm and immobile mass felt against the bowel wall during a rectal examination is concerning for a potential malignancy, such as colon cancer. Other conditions such as hemorrhoids or anal fissures are typically not associated with a mass that is firm and immobile. The "Valve of Houston" is a term that does not pertain to this scenario and is not a recognized medical entity. Therefore, the most likely diagnosis based on the given information is colon cancer, and further evaluation such as a colonoscopy would be warranted for definitive diagnosis and management.

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: A

Rationale: Rheumatoid arthritis is a systemic autoimmune disease that primarily affects the joints. It commonly presents with pain, swelling, and stiffness in multiple small joints such as those in the hands, wrists, and feet. It is more prevalent in females in their 30s to 50s. Rheumatoid arthritis is characterized by chronic inflammation of the synovial membrane, leading to joint damage and deformities over time. Laboratory tests showing elevated inflammatory markers, such as C-reactive protein (CRP) and erythrocyte sedimentation rate (ESR), along with positive rheumatoid factor and anti-cyclic citrullinated peptide (anti-CCP) antibodies, can help in confirming the diagnosis of rheumatoid arthritis.

Correct Answer: D

Rationale: Since the patient, Susanne, has been experiencing headaches, muscle aches, and fatigue for the last 2 months, and a thorough history, examination, and laboratory workup have not revealed a definitive cause, the next step would be to screen for depression. Depression can present with physical symptoms such as headaches, muscle aches, and fatigue. It is important to consider mental health factors that could be contributing to Susanne's symptoms before proceeding with further referrals to specialists. Screening for depression would help in determining if psychological factors are playing a role in her physical symptoms.

Correct Answer: C

Rationale: The presentation of multiple small, blood-red, raised lesions over the anterior chest and abdomen in a middle-aged man raises concern for a condition known as cherry angiomas. Cherry angiomas are common benign vascular growths often seen in middle-aged and older individuals. They are typically asymptomatic and do not require treatment unless they are bothersome to the patient cosmetically.