Overview
You may be surprised to learn that most people have one leg that's just a bit longer than the other, or one foot that may be slightly larger. But for children with significant limb length discrepancies, the size difference between limbs can be a serious problem. There are two types of limb length discrepancies. Congenital discrepancy is when babies are born with one leg longer than the other. In some cases both legs are normal, except that one is shorter than the other. In other cases one particular part of the leg is underdeveloped or is absent. Acquired discrepancy is when babies are normal at birth, but some kind of injury happens, such as a severe fracture. The bone growth in that limb slows, which results in a leg length discrepancy that worsens as the child continues to grow. Causes Leg length discrepancies can be caused by: hip and knee replacements, lower limb injuries, bone diseases, neuromuscular issues and congenital problems. Although discrepancies of 2 cm or less are most common, discrepancies can be greater than 6 cm. People who have LLD tend to make up for the difference by over bending their longer leg or standing on the toes of their shorter leg. This compensation leads to an inefficient, up and down gait, which is quite tiring and over time can result in posture problems as well as pain in the back, hips, knees and ankles. Symptoms Patients with significant lower limb length discrepancies may walk with a limp, have the appearance of a curved spine (non-structural scoliosis), and experience back pain or fatigue. In addition, clothes may not fit right. Diagnosis A qualified musculoskeletal expert will first take a medical history and conduct a physical exam. Other tests may include X-rays, MRI, or CT scan to diagnose the root cause. Non Surgical Treatment After the leg length discrepancy has been identified it can be categorized in as structural or functional and appropriate remedial action can be instigated. This may involve heel lifters or orthotics being used to level up the difference. The treatment of LLD depends on the symptoms being experienced. Where the body is naturally compensating for the LLD (and the patient is in no discomfort), further rectifying action may cause adverse effects to the biomechanical mechanism of the body causing further injury. In cases of functional asymmetry regular orthotics can be used to correct the geometry of the foot and ground contact. In structural asymmetry cases heel lifts may be used to compensate for the anatomic discrepancy. what is a heel raise? Surgical Treatment The bone is lengthened by surgically applying an external fixation device to the leg. The external fixator, a scaffold-like frame, is connected to the bone with wires, pins, or both. A small crack is made in the bone and the frame creates tension when the patient or family member turns its dial. This is done several times each day. The lengthening process begins approximately five to 10 days after surgery. The bone may lengthen 1 millimeter per day, or approximately 1 inch per month. Lengthening may be slower in a bone that was previously injured. It may also be slower if the leg was operated on before. Bones in patients with potential blood vessel abnormalities, such as cigarette smokers, may also need to be lengthened more slowly. The external fixator is worn until the bone is strong enough to support the patient safely. This usually takes about three months for each inch. Factors such as age, health, smoking and participation in rehabilitation can affect the amount of time needed.
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Overview
The plantar fascia is a broad fan shaped strap of strong body tissue which stretches from the bottom of the heel bone to the ball of the foot. It helps to hold the foot bones and joints in place. When it is over stressed (over stretched) typical symptoms occur. The heels hurt most of all first thing in the morning or after a period of rest. The heels are also very sore after standing for a long time. Causes Heel pain is not usually caused by a single injury, such as a twist or fall, but rather the result of repetitive stress and pounding of the heel. The most common causes of heel pain are Plantar fasciitis (plantar fasciosis) - inflammation of the plantar fascia. The plantar fascia is a strong bowstring-like ligament that runs from the calcaneum (heel bone) to the tip of the foot. When the plantar fasciitis is stretched too far its soft tissue fibers become inflamed, usually where it attaches to the heel bone. Sometimes the problem may occur in the middle of the foot. The patient experiences pain under the foot, especially after long periods of rest. Some patients have calf-muscle cramps if the Achilles tendon tightens too. Heel bursitis, inflammation of the back of the heel, the bursa (a fibrous sac full of fluid). Can be caused by landing awkwardly or hard on the heels. Can also be caused by pressure from footwear. Pain is typically felt either deep inside the heel or at the back of the heel. Sometimes the Achilles tendon may swell. As the day progresses the pain usually gets worse. Heel bumps (pump bumps) common in teenagers. The heel bone is not yet fully mature and rubs excessively, resulting in the formation of too much bone. Often caused by having a flat foot. Among females can be caused by starting to wear high heels before the bone is fully mature Tarsal tunnel syndrome, a large nerve in the back of the foot becomes pinched, or entrapped (compressed). This is a type of compression neuropathy that can occur either in the ankle or foot. Chronic inflammation of the heel pad, caused either by the heel pad becoming too thin, or heavy footsteps. Stress fracture, this is a fracture caused by repetitive stress, commonly caused by strenuous exercise, sports or heavy manual work. Runners are particularly prone to stress fracture in the metatarsal bones of the foot. Can also be caused by osteoporosis. Severs disease (calcaneal apophysitis) the most common cause of heel pain in child/teenage athletes, caused by overuse and repetitive microtrauma of the growth plates of the calcaneus (heel bone). Children aged from 7-15 are most commonly affected. Achilles tendonosis (degenerative tendinopathy) also referred to as tendonitis, tendinosis and tendinopathy. A chronic (long-term) condition associated with the progressive degeneration of the Achilles tendon. Sometimes the Achilles tendon does not function properly because of multiple, minor microscopic tears of the tendon, which cannot heal and repair itself correctly, the Achilles tendon receives more tension than it can cope with and microscopic tears develop. Eventually, the tendon thickens, weakens and becomes painful. Symptoms The most common complaint is pain and stiffness in the bottom of the heel. Heel pain may be sharp or dull, and it may develop slowly over time or suddenly after intense activity. The pain is typically worse in the morning, when taking your first steps of the day. After standing or sitting for a while. When climbing stairs. Diagnosis A podiatrist (doctor who specializes in the evaluation and treatment of foot diseases) will carry out a physical examination, and ask pertinent questions about the pain. The doctor will also ask the patient how much walking and standing the patient does, what type of footwear is worn, and details of the his/her medical history. Often this is enough to make a diagnosis. Sometimes further diagnostic tests are needed, such as blood tests and imaging scans. Non Surgical Treatment Essentially rest from aggravating activity, physiotherapy treatment to alleviate the inflammatory component, stretching the tight calf, strengthening up of the intrinsic muscles of the foot e.g. tissue scrunch, picking up pens etc. and correction of biomechanical problems in the foot e.g. orthotics. Sometimes, a heel cup or pad to relieve pressure - a donut type pad may be helpful. Strapping has been shown to be helpful, especially in circumstances where the patient can?t wear orthotics - the foot is strapped to help support the arch. There has been limited success with cortisone injections or surgery and the latter is very rarely required. Surgical Treatment Surgery to correct heel pain is generally only recommended if orthotic treatment has failed. There are some exceptions to this course of treatment and it is up to you and your doctor to determine the most appropriate course of treatment. Following surgical treatment to correct heel pain the patient will generally have to continue the use of orthotics. The surgery does not correct the cause of the heel pain. The surgery will eliminate the pain but the process that caused the pain will continue without the use of orthotics. If orthotics have been prescribed prior to surgery they generally do not have to be remade. ankle straps for heels Prevention A variety of steps can be taken to avoid heel pain and accompanying afflictions. Wear shoes that fit well-front, back, and sides-and have shock-absorbent soles, rigid shanks, and supportive heel counters. Wear the proper shoes for each activity. Do not wear shoes with excessive wear on heels or soles. Prepare properly before exercising. Warm up and do stretching exercises before and after running. Pace yourself when you participate in athletic activities. Don't underestimate your body's need for rest and good nutrition. If obese, lose weight. Overview
Morton's neuroma is an enlarged nerve that usually occurs in the third interspace, which is between the third and fourth toes. To understand Morton's neuroma further, it may be helpful to look at the anatomy of the foot. Problems often develop in the third interspace because part of the lateral plantar nerve combines with part of the medial plantar nerve here. When the two nerves combine, they are typically larger in diameter than those going to the other toes. Also, the nerve lies in subcutaneous tissue, just above the fat pad of the foot, close to an artery and vein. Above the nerve is a structure called the deep transverse metatarsal ligament. This ligament is very strong, holds the metatarsal bones together, and creates the ceiling of the nerve compartment. With each step, the ground pushes up on the enlarged nerve and the deep transverse metatarsal ligament pushes down. This causes compression in a confined space. Causes Morton's neuroma develops for several reasons. The primary reason is wearing narrow toe-box shoes, which compress the metatarsal heads. Certain anatomical factors also make nerve compression more likely with the narrow toe box shoes. In some people fibers, the medial and lateral plantar nerves converge close to the heads of the third and fourth metatarsals. This junction creates a larger nerve structure between the metatarsal heads making it more vulnerable to compression. Symptoms People with Morton's neuroma usually complain of pain that can start in the ball of the foot and shoot into the affected toes. However, some people just have toe pain. There may also be burning and tingling of the toes. The symptoms are usually felt up the sides of the space between two toes. For example, if the nerve between the third and fourth long bones (metatarsals) of the right foot is affected, the symptoms will usually be felt up the right-hand side of the fourth toe and up the left-hand side of the third toe. Some people describe the pain that they feel as being like walking on a stone or a marble. Symptoms can be made worse if you wear high-heeled shoes. The pain is relieved by taking your shoe off, resting your foot and massaging the area. You may also experience some numbness between the affected toes. Your affected toes may also appear to be spread apart, which doctors refer to as the 'V sign'. The symptoms can vary and may come and go over a number of years. For example, some people may experience two attacks of pain in a week and then nothing for a year. Others may have regular and persistent (chronic) pain. Diagnosis During the exam, your doctor will press on your foot to feel for a mass or tender spot. There may also be a feeling of "clicking" between the bones of your foot. Some imaging tests are more useful than others in the diagnosis of Morton's neuroma. Your doctor is likely to order X-rays of your foot, to rule out other causes of your pain such as a stress fracture. Ultrasound. This technology uses sound waves to create real-time images of internal structures. Ultrasound is particularly good at revealing soft tissue abnormalities, such as neuromas. Magnetic resonance imaging (MRI). Using radio waves and a strong magnetic field, an MRI also is good at visualizing soft tissues. But it's an expensive test and often indicates neuromas in people who have no symptoms. Non Surgical Treatment If your Morton's neuroma is painful, your doctor usually will begin treatment with conservative therapies, including a switch to shoes with low heels, wide toes and good arch support. Padding techniques, including metatarsal pads or toe crest pads. Shoe inserts (orthotics) to help correct any mechanical imbalance in the foot. Anti-inflammatory medication, such as ibuprofen (Advil, Motrin and other brand names) or naproxen (Aleve, Naprosyn and other brand names) A local injection of anesthetic and corticosteroid medication into the affected area. Inflamed or injured nerves can take months to improve, even after the underlying problem has been corrected. Surgical Treatment Patients are commonly offered surgery known as neurectomy, which involves removing the affected piece of nerve tissue. Postoperative scar tissue formation (known as stump neuroma) can occur in approximately 20%-30% of cases, causing a return of neuroma symptoms. Neurectomy can be performed using one of two general methods. Making the incision from the dorsal side (the top of the foot) is the more common method but requires cutting the deep transverse metatarsal ligament that connects the 3rd and 4th metatarsals in order to access the nerve beneath it. This results in exaggerated postoperative splaying of the 3rd and 4th digits (toes) due to the loss of the supporting ligamentous structure. This has aesthetic concerns for some patients and possible though unquantified long-term implications for foot structure and health. Alternatively, making the incision from the ventral side (the sole of the foot) allows more direct access to the affected nerve without cutting other structures. However, this approach requires a greater post-operative recovery time where the patient must avoid weight bearing on the affected foot because the ventral aspect of the foot is more highly enervated and impacted by pressure when standing. It also has an increased risk that scar tissue will form in a location that causes ongoing pain. |
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July 2017
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