Correct Answer: C

Rationale: The pectoral lymph node group, also known as the Level III lymph nodes, is the most commonly involved in breast cancer metastasis. These lymph nodes are located along the lower border of the pectoralis minor muscle and are an important regional drainage site for breast tissue. Therefore, in cases of breast cancer, the pectoral lymph nodes are frequently affected due to their proximity to the breast tissue.

Correct Answer: B

Rationale: Since the baby is exhibiting jaundice, which is a condition characterized by the yellowing of the skin, it is important to inquire about the family history of liver diseases. Jaundice can be a sign of liver dysfunction or disease, so understanding the family history of liver diseases can provide valuable insights into potential underlying causes for the baby's jaundice. In this case, it is crucial to explore this area further to determine if there may be any genetic predispositions or familial conditions that could be contributing to the baby's presentation of jaundice.

Correct Answer: A

Rationale: A hyperresonant percussion note is a more intense and booming sound heard during percussion of the thorax. This can occur when there is an increased amount of air present in the chest cavity. In the case of a large pneumothorax, which is the presence of air in the pleural space causing partial or complete collapse of the lung, the percussion note would be hyperresonant due to the increased air content in the thoracic cavity. Lobar pneumonia, pleural effusion, and empyema would typically produce dull or flat percussion notes due to the presence of fluid or solid material in the pleural space.

Correct Answer: A

Rationale: Otosclerosis is a condition characterized by abnormal bone growth in the middle ear, specifically around the stapes bone. In cases of otosclerosis, the bone conduction is greater than air conduction on the affected side, which is seen in the scenario described. The Weber test localizes to the affected ear, meaning the patient hears the sound of the tuning fork better in the left ear in this case. This is because the abnormal bone growth can restrict the movement of the ossicles, leading to a conductive hearing loss. Otosclerosis typically affects one ear, and its presentation aligns with the results of the hearing tests performed in this case.

Correct Answer: A

Rationale: Mr. Kelly's scenario is consistent with the phenomenon called "white coat hypertension," where an individual's blood pressure readings are elevated in a medical setting due to anxiety or stress, but are normal when measured at home. This discrepancy between office and home readings is a key indicator of white coat hypertension. Additionally, the fact that Mr. Kelly has been consistently monitoring his blood pressure at home and has kept a log supports the likelihood that his elevated readings in the office are primarily due to the stress of being in that environment. It is important to acknowledge white coat hypertension as a common occurrence and not necessarily a reflection of true high blood pressure that requires immediate medical intervention.