Dawn is a 55-year-old woman who comes in today for her yearly wellness examination. You carefully perform the rectal examination in the lithotomy position and feel a mass against the bowel wall which is firm and immobile. Which of the following is most likely?

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: C

Rationale: The obturator sign is a physical examination maneuver used to assess for irritation of the obturator muscle due to an inflamed appendix that is in close proximity. This pain is typically felt in the right lower quadrant or hypogastric region. The sign is elicited by passively flexing the hip and knee of the patient, then internally rotating the hip. An alternative method is to position the patient on her left side and ask her to raise her right thigh against resistance while the examiner provides counterpressure. Pain experienced by the patient with these maneuvers is consistent with obturator sign, indicating possible appendicitis. Hence, option C is the correct answer.

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 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: Hypertension, or high blood pressure, is not typically associated with causing ulcers in the lower extremities. The most common causes of lower extremity ulcers are arterial insufficiency, venous insufficiency, and diminished sensation in pressure points. Arterial insufficiency leads to decreased blood flow to the lower extremities, causing tissue damage and ulcers. Venous insufficiency results in poor circulation and increased pressure in the veins, leading to ulcers. Diminished sensation in pressure points, often seen in conditions like diabetes, can cause ulcers due to lack of feeling and increased risk of trauma. So, hypertension is not directly related to the development of lower extremity ulcers.

Correct Answer: C

Rationale: A "red flag" regarding patients presenting with a headache is their age being over 50. This is because new-onset or persistent headaches in individuals over 50 may raise concerns about underlying serious conditions such as temporal arteritis, brain tumor, or other vascular issues. It is important to thoroughly evaluate and consider these possibilities in older patients with headaches to ensure appropriate management and timely intervention.

Correct Answer: D

Rationale: The most appropriate response based on the information provided would be to give the patient information concerning the reduction of fat and cholesterol in her diet because she is obese. The patient's weight falls in the obese category, and addressing diet is an important step in managing obesity. Providing guidance on reducing fat and cholesterol intake can help the patient make healthier food choices and work towards achieving a healthier weight. Additionally, diet plays a significant role in overall health, so addressing nutrition is crucial when managing obesity. It is important to approach the topic sensitively and provide support and resources to help the patient make positive changes for their health.

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: 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.