Correct Answer: A

Rationale: Retinoblastoma typically presents with a white reflex, known as leukocoria or a cat's eye reflex, instead of the normal red reflex seen during ophthalmoscopy. The presence of red reflexes bilaterally in this case essentially rules out retinoblastoma as a differential diagnosis.

Correct Answer: C

Rationale: Given the patient's history and presentation, the most likely diagnosis for the abnormality seen on examination is a cervical polyp. Cervical polyps are benign growths that arise from the mucosal surface of the cervix. They are typically red or purple in color and can bleed easily, especially when touched, as in this case with the Pap smear causing bleeding. Cervical polyps are usually asymptomatic but can present with painless bleeding, particularly after intercourse. In this patient, the visualization of a red mass at the os during speculum examination and the finding of bleeding with manipulation support the diagnosis of a cervical polyp. Additionally, the absence of other significant findings on examination and the patient's overall healthy appearance further support this benign diagnosis. Further evaluation with possible removal of the polyp may be warranted for confirmation and to alleviate the bleeding symptoms.

Correct Answer: C

Rationale: Leaving the plexor finger on the pleximeter after each strike is consistent with good percussion technique. This helps to maintain stability and precision during percussion by providing a consistent point of contact for accurate assessment of the underlying structures. This technique also helps to control the force and angle of the percussive strike, ensuring accurate interpretation of the resulting sounds produced. Maintaining this contact can enhance the effectiveness of percussion as a diagnostic tool in physical examinations.

Correct Answer: B

Rationale: In an elderly woman with a history of coronary bypass surgery presenting with severe, diffuse abdominal pain that is not worsened by abdominal palpation, neuropathy should be suspected. Neuropathy refers to nerve damage, which can result in abnormal sensations of pain, often described as burning, shooting, or stabbing. Abdominal neuropathy can be caused by various conditions such as diabetes, alcohol abuse, vitamin deficiencies, or certain medications. The absence of worsening pain upon palpation makes organic abdominal pathology less likely, suggesting a neuropathic etiology. In this case, further evaluation and testing for neuropathy would be warranted.

Correct Answer: A

Rationale: A tender, painful swelling of the scrotum is a common symptom of acute epididymitis, which is the inflammation of the epididymis. The epididymis is a tube located at the back of the testicle that stores and transports sperm. In acute epididymitis, the swelling is usually accompanied by pain, tenderness, redness, and warmth in the affected area. Other symptoms may include fever, chills, and discharge from the penis. Prompt medical evaluation and treatment are necessary to prevent complications such as abscess formation or chronic epididymitis. Strangulated inguinal hernia and torsion of the spermatic cord may present with severe pain and swelling in the scrotum, but they have distinct mechanisms and require different management approaches.