Benign nerve tumour (Morton’s neuroma)

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Benign nerve nodule

Benign nerve nodule, also known as Morton’s neuroma, is a thickening of a nerve most commonly found between the 3rd and 4th toe. It can also occur between the 2nd and 3rd toe, counting from the big toe. The thickening of the nerve is the result of a combination of irritation and pressure on the nerve. The pressure can cause swelling of the nerve and possibly nerve damage.

The causes of Morton’s neuroma are usually unknown. Anything that causes pressure and irritation can contribute to the development of the neuroma. Narrow high-heeled shoes can be the triggering cause.

Symptoms

The symptoms are tingling, burning and numb sensation in the toes, pain and a feeling of swelling inside the ball of the foot. The symptoms usually develop gradually and initially are only present when wearing narrow shoes.

Examination

You will be examined by one of our orthopaedic surgeons, who will ask thoroughly about your problem. The diagnosis is made based on the medical history and the findings from the clinical examination. It can be supplemented with an ultrasound examination or an MRI scan of the foot to rule out other conditions.

Treatment

The treatment depends on the severity of the symptoms. Surgery is not always necessary.

The following options can relieve the symptoms:

  • forefoot insoles
  • avoid narrow
  • high-heeled shoes
  • treatment with anti-rheumatic medication
  • injection treatment with steroid, local anaesthetic or a combination of these

Surgery can be considered if the above measures are not sufficient. Here, the nerve is accessed through a small incision on the top of the foot. The nerve nodule is then located and removed. The skin is closed with several stitches. The operation is performed under general anaesthesia. 

After the operation

After the operation, you can bear weight on the foot. However, you will borrow a pair of crutches for relief during the first few days. You will always be numb between the two involved toes, as the nerve to them is removed. In rare cases, a recurrence of the neuroma can be seen in the cut nerve end. For some months after the operation, there may be some swelling present around the scar.