Theo Nash
Cortisone injections are often used to treat Morton's neuroma, a thickening or swelling of the nerve between the small bones of the forefeet. Cortisone injections can help most people become pain-free in a short amount of time, but the effects usually only last a few weeks. Similarly, alcohol injections have been used to treat Morton's neuroma with mixed success. However, in some cases, these injections may not provide sufficient relief, or patients may experience negative side effects. In such cases, more aggressive treatments may be considered, such as ultrasound-guided radiofrequency ablation, which has been shown to be safe and effective in treating symptomatic Morton's neuroma.
| Characteristics | Values |
|---|---|
| Cortisone and alcohol injections | Cortisone injections can cause skin atrophy, depigmentation, and damage to soft tissue around the neuroma such as the ligaments. |
| Alcohol injections are painful and can cause soft tissue destruction. | |
| Risks | Cortisone injections are not recommended for patients with "bony feet", prone to allergies, or those who have had previous steroid injections. |
| Cortisone injections may not be effective for all patients. | |
| Alternatives | Ultrasound-guided radiofrequency ablation is a safe alternative with excellent initial results. |
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What You'll Learn
Ultrasound-guided radiofrequency ablation
Corticosteroid injections are often used to treat Morton's neuroma, a condition that causes pain and swelling between the small bones of the forefeet. However, these injections may not always be effective, and patients may experience side effects such as transient numbness, pain at the injection site, muscle weakening, and skin atrophy. In such cases, a more aggressive treatment approach may be necessary, such as ultrasound-guided radiofrequency ablation.
This procedure offers several benefits over other treatments. Firstly, it is an outpatient procedure, meaning patients can return home the same day. Secondly, real-time ultrasound guidance helps visualize the needle tip, ensuring accurate placement and reducing the risk of injury to surrounding tissues. This precision also allows for the diagnosis of other local pathologies, such as synovitis or tendon pathology.
While most patients experience significant pain relief after two ultrasound-guided radiofrequency ablations, some may require additional treatments. In rare cases where radiofrequency ablation is ineffective, alternative ultrasound-guided ablation procedures, such as cryosurgery, can be considered. Cryosurgery uses cold temperatures to selectively destroy neuroma tissue and has been shown to provide pain relief for various nerve pathologies, including Morton's neuroma.
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Surgery
If cortisone and alcohol injections do not work for Morton's neuroma, surgery may be considered as a last resort. However, it is important to note that surgery is not always 100% successful, and there is a risk that the pain may persist even after the neuroma is completely excised.
When considering surgery for Morton's neuroma, it is important to consult with a qualified healthcare professional to discuss the risks and benefits of the procedure. The type of surgery performed will depend on the specific circumstances of the patient and the severity of their condition.
One surgical option for Morton's neuroma is ultrasound-guided radiofrequency ablation (RFA). This procedure uses ultrasound imaging to guide a small probe into the affected area, which delivers radiofrequency energy to heat and destroy the damaged nerve tissue. RFA has been shown to be safe and effective in treating symptomatic Morton's neuroma, with high patient satisfaction rates reported in clinical studies.
Another surgical option is cryoablation, which uses extreme cold to destroy the damaged nerve tissue. This procedure is also typically performed under ultrasound guidance to ensure accuracy and minimize the risk of damaging surrounding tissues.
In some cases, a more invasive surgical approach may be necessary, such as neuroma resection or neurectomy. These procedures involve making a small incision in the foot to access and remove the affected nerve. While these surgeries can be effective, they may also result in some loss of sensation in the affected area due to the removal of the nerve.
It is important to carefully consider the potential risks and benefits of surgery for Morton's neuroma, as with any medical procedure. Surgery may carry a risk of infection, nerve damage, or other complications, and there may be a period of recovery and rehabilitation required afterward.
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Simple treatments: change in footwear or orthotics
If you're experiencing Morton's neuroma, a simple treatment option is to change your footwear or use orthotics. This condition is caused by abnormal foot biomechanics and wearing the wrong type of shoes. Therefore, switching to shoes with a wide, deep toe box can help take the pressure off the affected nerve. You may also be able to use a stretching device to widen shoes you already own.
It's important to avoid wearing shoes with a narrow toe box or high heels, as this may squeeze the metatarsals together and compress the nerve, causing pain. Generally, it is recommended to get a wider, more stable shoe.
Orthotics are shoe inserts that support your feet and keep your toes in the correct position. They redistribute weight throughout the foot, reducing pressure and pain around the neuroma. They also have shock-absorbing qualities, which reduce the shock placed on the forefoot when it strikes the ground. Orthotics can be over-the-counter or custom-made.
Footlogics Metatarsalgia orthotics are recommended for people who wear flat shoes, boots, or athletic footwear. They help lift your forefoot bone structure, reducing excess pressure and friction on the metatarsal bones and relieving the surrounding ligaments and nerves.
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Side effects of cortisone injections: skin atrophy, depigmentation, and damage to soft tissue
Cortisone injections are used to treat Morton's neuroma, a thickening or swelling of the nerve between the small bones of the forefeet. The injection can help most people become pain-free in a short amount of time, although this effect usually only lasts a few weeks. Cortisone injections should not be used as an initial treatment due to the risks involved.
Cortisone injections can cause side effects such as skin atrophy, depigmentation, and damage to soft tissue. Skin atrophy, or cutaneous atrophy, can begin within 2-3 months of an injection and typically resolves in 1-2 years, although it has been known to persist for over 5 years. Skin atrophy occurs when there is a decrease in fibroblasts, reduced glycosaminoglycan production, and collagen degeneration. Hypopigmentation, or depigmentation, occurs when steroids or biologically inactive steroid components interfere with skin pigmentation. This side effect has been observed in 1.3-4% of patients and typically occurs 1-4 months after the injection, resolving within 6-30 months.
To reduce the risk of skin atrophy and hypopigmentation, steroids with suitable solubility and potency should be used. Steroids with low solubility, such as triamcinolone acetonide, are recommended for injection into deep structures like the knee, elbow, and shoulder, while steroids with high solubility, such as betamethasone sodium and dexamethasone, are preferred for soft tissues. Additionally, compressing the injection site with gauze after the injection can help prevent steroid leakage and reduce the risk of atrophy.
When cortisone injections don't provide relief for neuroma, more aggressive treatments may be considered, such as ultrasound-guided ablation. Alcohol injections have been used with mixed success and are generally not recommended due to the risk of adverse reactions and tissue damage.
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Other injection treatments: phenol, botulinum, capsaicin
Corticosteroid injections are a common treatment for Morton's neuroma, but they may not be suitable for everyone due to potential side effects and the risk of complications. In cases where cortisone and alcohol injections are not effective or feasible, other injection treatments, such as phenol, botulinum toxin, and capsaicin, may be considered.
Phenol injections, often guided by ultrasound or sonography, can be used to treat painful stump neuromas, especially after limb amputation. Phenol injection impairs and destroys peripheral neural tissue, providing long-lasting relief in some patients. However, nerve regeneration can occur weeks after the procedure, and there may be individual differences in the success of the treatment.
Botulinum toxin injections have been studied as a potential treatment for Morton's neuroma. The toxin blocks neurotransmitter release, altering sensitization phenomena and interrupting the cycle of pain. In a pilot study, 70.6% of patients showed marked and sustained improvement, while 29.4% showed no benefit. The treatment was well-tolerated, with no adverse effects observed, and it may also reduce fibrosis and decrease the size of the neuroma.
Capsaicin, the compound that gives hot peppers their pungency, has been investigated as an injection treatment for Morton's neuroma. In a randomized, double-blind, placebo-controlled trial, subjects injected with capsaicin reported significantly greater decreases in pain compared to the placebo group. Capsaicin injections were found to be efficacious and well-tolerated, with improvements in functional interference scores and reductions in oral analgesic use.
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Frequently asked questions
Cortisone injections are used to reduce the inflammation of the nerve in people with Morton's neuroma. Alcohol injections are meant to destroy the nerve rather than reduce swelling.
Side effects of cortisone injections include skin atrophy, skin depigmentation, and damage to soft tissue around the neuroma such as the ligaments.
Alcohol injections are relatively painful and carry a higher risk of adverse reactions to the adjacent tissue. Some reports of soft tissue destruction have been noted.
Cortisone injections carry the risk of skin depigmentation, which is more likely to occur in patients with darker skin. Other risks include fat atrophy and weakening of the muscles and ligaments surrounding the injection site.
Alternative treatments for Morton's neuroma include ultrasound-guided radiofrequency ablation, cryoablation, and orthosis. In some cases, pain may settle without injections or surgery through conservative measures such as changing footwear or using orthotics.
