A 16-year-old basketball player complains of pain in his knees. A physical examination reveals, in addition to tenderness, a swollen and prominent tibial tubercle. Radiographs of the area are unremarkable. Which of the following is the most likely diagnosis?

a. Osgood-Schlatter disease

b. Popliteal cyst

c. Slipped capital femoral epiphysis

d. Legg-Calvé-Perthes disease

e. Gonococcal arthritis

the answer is below…

The United States Medical Licensing Examination, or USMLE for short, is a three-part licensing examination that is required in order to receive a license to practice medicine within the United States.

The USMLE assesses a physician’s ability to apply knowledge, concepts, and principles, and to determine fundamental patient-centered skills that are important in health and disease and that constitute the basis of safe and effective patient care.Examination committees composed of medical educators and clinicians from across the United States and its territories prepare the examination materials each year.

This exam is designed by the Federation of State Medical Boards and the National Board of Medical Examiners to determine whether or not an individual understands and can apply the knowledge necessary to practice medicine safely and intelligently.

The USMLE is actually comprised of three different exams that are referred to as steps, which examine the individual’s knowledge of specific topics related to the field of medicine such as basic science, medical knowledge, medical skills, clinical science, and the application of all of these skills and areas of knowledge in the medical field.

All three steps of the USMLE include a series of computerized multiple-choice questions, but the format of the exam and the information covered in each multiple-choice section is different for each step of the USMLE. The USMLE Step II also has a clinical skills portion that examines an individual’s ability to work with real patients and the USMLE Step III has a computerized patient simulation portion in addition to the multiple-choice section of the exam. In order for an individual to receive a license to practice medicine, the individual must pass all three steps of the USMLE.

Medical doctors with an M.D. degree are required to pass this examination before being permitted to practice medicine in the United States of America

The correct answer is a; Osgood-Schlatter disease.

This history is typical of Osgood-Schlatter disease. Microfractures in the area of the insertion of the patellar tendon into the tibial tubercle are common in athletic adolescents. Swelling, tenderness, and an increase in size of the tibial tuberosity are found. Radiographs can be necessary to rule out other conditions. Treatment consists of rest.

Legg-Calvé-Perthes disease is avascular necrosis of the femoral head. This condition usually produces mild or intermittent pain in the anterior thigh but can also present as a painless limp. Gonococcal arthritis, although common in this age range, is uncommon in this anatomic site. More significant systemic signs and symptoms, including chills, fever, migratory polyarthralgia, and rash, are commonly seen. Slipped capital femoral epiphysis is usually seen in a younger, more obese child (mean age about 10 years) or in a thinner, older child who has just undergone a rapid growth spurt. Pain upon movement of the hip is typical. Popliteal (Baker) cysts are found on the posterior aspect of the knee. Observation is usually all that is necessary, as they typically resolve over several years. Surgical excision is indicated if the cyst progressively enlarges or if there are unacceptable symptoms associated with the cyst.