Sinding-Larsen-Johansson Syndrome

with Rehab

ExitCare ImageSinding-Larsen-Johansson syndrome is a condition that occurs most commonly in skeletally immature individuals (under the age of 16 years old). The condition involves inflammation of the bottom (distal) end of the kneecap (patella). If the quadriceps muscles, which are responsible for straightening the knee, are over used, then stress is placed on the patella causing and inflammatory response. The condition is characterized by pain below the patella (infrapatellar).

SYMPTOMS

  • Pain, tenderness, and/or inflammation below the patella.

  • Pain that worsens with activity, especially activities that require great use of the thigh muscles.

  • In more severe cases, pain during less vigorous activity.

CAUSES

Sinding-Larsen-Johansson Syndrome is caused by stress placed on the patella that results in an inflammatory response. Common mechanisms of injury include:

  • Repetitive and/or strenuous activity involving the knee joint. This may be the result of an increase in the intensity, frequency, or duration of training.

  • Direct trauma to the knee.

RISK INCREASES WITH:

  • Sudden increase in the intensity, frequency, or duration of training.

  • Obesity.

  • Males between 10 and 15 years old.

  • Rapid skeletal growth.

  • Poor strength and flexibility.

PREVENTION

  • Warm up and stretch properly before activity.

  • Maintain physical fitness:

  • Strength, flexibility, and endurance.

  • Cardiovascular fitness.

  • Learn and use proper technique, especially in training program design. When possible, have a coach correct improper technique.

PROGNOSIS

The prognosis depends on the extent of the injury. Mild cases require only minimal reduction of activity; whereas mild to severe cases may require immobilization and rehabilitation.

RELATED COMPLICATIONS

  • Bone infection.

  • Recurrent symptoms that result in a chronic problem.

  • Bony prominence below the patella

TREATMENT

Treatment initially involves the use of ice and medication to help reduce pain and inflammation. The use of strengthening and stretching exercises may help reduce pain with activity. These exercises may be performed at home or with referral to a therapist. Your caregiver may recommend that you immobilize the knee joint to allow for healing, this is uncommon. After immobilization it is important to perform strengthening and stretching exercises to help regain strength and a full range of motion. You may find benefit in wearing a brace that is placed under the patella (patellar band) when you exercise. If symptoms persist despite non-surgical (conservative) treatment, then surgery may be recommended.

MEDICATION

  • Nonsteroidal anti-inflammatory medications, such as aspirin and ibuprofen (do not take for 7 days before surgery), or other minor pain relievers, such as acetaminophen, are often recommended. Take these as directed by your caregiver. Contact your caregiver immediately if any bleeding, stomach upset, or signs of an allergic reaction occur.

  • Cortisone injections are rarely, if ever, indicated. Cortisone injections may weaken tendons, so it is better to give the condition more time to heal than to use them.

HEAT AND COLD

  • Cold treatment (icing) relieves pain and reduces inflammation. Cold treatment should be applied for 10 to 15 minutes every 2 to 3 hours for inflammation and pain and immediately after any activity that aggravates your symptoms. Use ice packs or massage the area with a piece of ice (ice massage).

  • Heat treatment may be used prior to performing the stretching and strengthening activities prescribed by your caregiver, physical therapist, or athletic trainer. Use a heat pack or soak the injury in warm water.

SEEK MEDICAL CARE IF:

  • Treatment seems to offer no benefit, or the condition worsens.

  • Any medications produce adverse side effects.

EXERCISES

RANGE OF MOTION (ROM) AND STRETCHING EXERCISES - Sinding-Larsen-Johansson Syndrome

These exercises may help you when beginning to rehabilitate your injury. Your symptoms may resolve with or without further involvement from your physician, physical therapist or athletic trainer. While completing these exercises, remember:

  • Restoring tissue flexibility helps normal motion to return to the joints. This allows healthier, less painful movement and activity.

  • An effective stretch should be held for at least 30 seconds.

  • A stretch should never be painful. You should only feel a gentle lengthening or release in the stretched tissue.

ExitCare Image STRETCH - Hamstrings, Standing

  • Stand or sit and extend your right / left leg, placing your foot on a chair or foot stool

  • Keeping a slight arch in your low back and your hips straight forward.

  • Lead with your chest and lean forward at the waist until you feel a gentle stretch in the back of your right / left knee or thigh. (When done correctly, this exercise requires leaning only a small distance.)

  • Hold this position for __________ seconds.

Repeat __________ times. Complete this stretch __________ times per day.

ExitCare Image STRETCH – Hamstrings, Supine

  • Lie on your back. Loop a belt or towel over the ball of your right / left foot.

  • Straighten your right / left knee and slowly pull on the belt to raise your leg. Do not allow the right / left knee to bend. Keep your opposite leg flat on the floor.

  • Raise the leg until you feel a gentle stretch behind your right / left knee or thigh. Hold this position for __________ seconds.

Repeat __________ times. Complete this stretch __________ times per day.

ExitCare Image STRETCH - Hamstrings, Doorway

  • Lie on your back with your right / left leg extended and resting on the wall and the opposite leg flat on the ground through the door. Initially, position your bottom farther away from the wall than the illustration shows.

  • Keep your right / left knee straight. If you feel a stretch behind your knee or thigh, hold this position for __________ seconds.

  • If you do not feel a stretch, scoot your bottom closer to the door, and hold __________ seconds.

Repeat __________ times. Complete this stretch __________ times per day.

ExitCare Image STRETCH - Quadriceps, Prone

  • Lie on your stomach on a firm surface, such as a bed or padded floor.

  • Bend your right / left knee and grasp your ankle. If you are unable to reach, your ankle or pant leg, use a belt around your foot to lengthen your reach.

  • Gently pull your heel toward your buttocks. Your knee should not slide out to the side. You should feel a stretch in the front of your thigh and/or knee.

  • Hold this position for __________ seconds.

Repeat __________ times. Complete this stretch __________ times per day.

STRENGTHENING EXERCISES - Sinding-Larsen-Johansson Syndrome

These exercises may help you when beginning to rehabilitate your injury. They may resolve your symptoms with or without further involvement from your physician, physical therapist or athletic trainer. While completing these exercises, remember:

  • Muscles can gain both the endurance and the strength needed for everyday activities through controlled exercises.

  • Complete these exercises as instructed by your physician, physical therapist or athletic trainer. Progress the resistance and repetitions only as guided.

ExitCare Image STRENGTH - Quadriceps, Isometrics

  • Lie on your back with your right / left leg extended and your opposite knee bent.

  • Gradually tense the muscles in the front of your right / left thigh. You should see either your knee cap slide up toward your hip or increased dimpling just above the knee. This motion will push the back of the knee down toward the floor/mat/bed on which you are lying.

  • Hold the muscle as tight as you can without increasing your pain for __________ seconds.

  • Relax the muscles slowly and completely in between each repetition.

Repeat __________ times. Complete this exercise __________ times per day.

ExitCare Image STRENGTH - Quadriceps, Short Arcs

  • Lie on your back. Place a __________ inch towel roll under your knee so that the knee slightly bends.

  • Raise only your lower leg by tightening the muscles in the front of your thigh. Do not allow your thigh to rise.

  • Hold this position for __________ seconds.

Repeat __________ times. Complete this exercise __________ times per day.

OPTIONAL ANKLE WEIGHTS: Begin with ____________________, but DO NOT exceed ____________________. Increase in 1 lb/0.5 kg increments.

ExitCare Image STRENGTH - Quadriceps, Straight Leg Raises

Quality counts! Watch for signs that the quadriceps muscle is working to insure you are strengthening the correct muscles and not "cheating" by substituting with healthier muscles.

  • Lay on your back with your right / left leg extended and your opposite knee bent.

  • Tense the muscles in the front of your right / left thigh. You should see either your knee cap slide up or increased dimpling just above the knee. Your thigh may even quiver.

  • Tighten these muscles even more and raise your leg 4 to 6 inches off the floor. Hold for __________ seconds.

  • Keeping these muscles tense, lower your leg.

  • Relax the muscles slowly and completely in between each repetition.

Repeat __________ times. Complete this exercise __________ times per day.

ExitCare Image STRENGTH - Quad/VMO, Isometric

  • Sit in a chair with your right / left knee slightly bent. With your fingertips, feel the VMO muscle just above the inside of your knee. The VMO is important in controlling the position of your kneecap.

  • Keeping your fingertips on this muscle. Without actually moving your leg, attempt to drive your knee down as if straightening your leg. You should feel your VMO tense. If you have a difficult time, you may wish to try the same exercise on your healthy knee first.

  • Tense this muscle as hard as you can without increasing any knee pain.

  • Hold for __________ seconds. Relax the muscles slowly and completely in between each repetition.

Repeat __________ times. Complete exercise __________ times per day.