lentigo melanoma

Understanding Lentigo Melanoma in Podiatry

Understanding Lentigo Melanoma in Podiatry

What is Lentigo Melanoma?

Lentigo melanoma is a type of skin cancer that specifically affects the skin on the feet. It is a rare form of melanoma that originates in the cells that produce pigment in the skin, known as melanocytes. Unlike other types of melanoma, lentigo melanoma tends to develop slowly and is often found in older individuals.


Lentigo melanoma is characterized by the presence of irregularly shaped pigmented lesions on the skin. These lesions are usually dark brown or black and have an asymmetrical appearance. Lentigo melanoma typically grows horizontally and does not invade deeper layers of the skin in its early stages.


The exact cause of lentigo melanoma is still unknown. However, it is believed that prolonged exposure to ultraviolet (UV) radiation from the sun or tanning beds may increase the risk of developing this condition. Other potential causes include genetic factors and a weakened immune system.

Risk Factors

Several risk factors can increase the likelihood of developing lentigo melanoma. These include:

  • Frequent and intense exposure to sunlight
  • History of sunburns
  • Family history of melanoma
  • Having fair skin, light hair, and blue or green eyes
  • Age over 50
  • Having many moles or atypical moles
  • Weakened immune system

Symptoms and Diagnosis

Visible Signs

Lentigo melanoma typically appears as a brown or black spot on the skin. The spot may have irregular borders and can vary in size. It may also change in shape, color, or size over time. Other signs to watch out for include itching, bleeding, or ulceration of the lesion.


Dermoscopy is a diagnostic technique commonly used by dermatologists to examine skin lesions. It involves the use of a dermoscope, which is a handheld device equipped with a magnifying lens and a light source. Dermoscopy allows healthcare professionals to evaluate the structure and pigmentation patterns of skin lesions, aiding in the diagnosis of lentigo melanoma.


A biopsy is the definitive diagnostic test for lentigo melanoma. During a biopsy, a small sample of the suspicious skin lesion is removed and examined under a microscope by a pathologist. The pathologist can determine whether the lesion is cancerous and also identify its specific characteristics, such as the thickness and depth of invasion.


After a diagnosis of lentigo melanoma is confirmed, further tests may be performed to determine the stage of the cancer. Staging helps in determining the extent of the cancer and guides treatment decisions. Staging may involve imaging tests, such as CT scans or PET scans, to check for the spread of cancer to other parts of the body.

Treatment Options

Surgical Excision

Surgical excision is the primary treatment for lentigo melanoma. During this procedure, the entire melanoma lesion is surgically removed along with a margin of healthy tissue surrounding it. The size of the excision margin depends on the thickness of the melanoma and other factors determined by the healthcare provider.

Mohs Surgery

Mohs surgery is a specialized surgical technique used for the treatment of lentigo melanoma in certain cases. It involves removing the tumor layer by layer and examining each layer under a microscope to ensure complete removal of cancer cells while minimizing damage to healthy tissue.

Laser Therapy

Laser therapy may be used as a treatment option for lentigo melanoma in some cases. It utilizes focused beams of light to destroy the cancer cells while minimizing damage to surrounding healthy tissue. Laser therapy can be effective for superficial melanomas that have not spread deeply into the skin.

Podiatry and Lentigo Melanoma

Podiatrist’s Role

Podiatrists play a crucial role in the diagnosis, treatment, and prevention of lentigo melanoma. They are specialized healthcare professionals who focus on the foot and ankle. Podiatrists are trained to recognize the signs and symptoms of lentigo melanoma on the feet and can provide appropriate care and referrals to dermatologists or oncologists as needed.

Foot Screening

Regular foot screenings by podiatrists are essential for early detection of lentigo melanoma. During a foot screening, the podiatrist thoroughly examines the skin on the feet, including the soles, nails, and between the toes, for any suspicious lesions or changes. Prompt identification and evaluation of abnormal findings can lead to early diagnosis and better treatment outcomes.

Early Detection

Early detection is crucial in improving the prognosis of lentigo melanoma. Podiatrists can educate their patients about the importance of regular self-examinations and recognizing the warning signs of skin cancer. By promoting early detection practices, podiatrists can help their patients seek timely medical attention and increase the chances of successful treatment.

Treatment Procedures

Podiatrists may perform certain treatment procedures for lentigo melanoma in the foot. This can include surgical excision of the lesion, coordinating with dermatologists or oncologists for further treatment, and providing post-operative care and follow-up. Podiatrists work in collaboration with other healthcare professionals to ensure comprehensive and effective treatment for patients.

Prevention and Risk Reduction

Sun Protection

Sun protection is crucial in reducing the risk of lentigo melanoma. Individuals should apply broad-spectrum sunscreen with a high sun protection factor (SPF) to their feet and exposed skin before going outdoors. Wearing protective clothing, such as hats and long sleeves, and seeking shade during peak sun hours also helps in minimizing UV exposure.

Regular Self-Examinations

Regular self-examinations of the feet are essential for early detection of lentigo melanoma. Individuals should examine their feet thoroughly, including the soles, tops, and between the toes, looking for any new or changing moles, lesions, or suspicious spots. Any concerning findings should be promptly reported to a healthcare professional.

Professional Check-ups

Regular check-ups with healthcare professionals, including podiatrists and dermatologists, are important for monitoring the skin and detecting any changes or abnormalities. These professionals can perform thorough examinations, provide expert guidance on skin cancer prevention, and address any concerns or questions.

Avoiding Risky Behaviors

Avoiding risky behaviors that increase the risk of lentigo melanoma is crucial. These include avoiding tanning beds, which emit harmful UV radiation, and minimizing direct sun exposure during peak hours. Individuals should also avoid excessive sunburns and protect their feet and skin in general from prolonged and intense sun exposure.

The Importance of Education and Awareness

Public Awareness Campaigns

Public awareness campaigns play a vital role in educating the general population about lentigo melanoma and other types of skin cancer. These campaigns aim to increase awareness about the risk factors, signs, and prevention strategies, encouraging individuals to take proactive measures to protect their skin health and seek timely medical attention when necessary.

Podiatry Education Initiatives

Podiatry education initiatives are essential in equipping podiatrists with the knowledge and skills necessary to identify and manage lentigo melanoma. Continuous professional development programs and educational resources can enhance the ability of podiatrists to provide comprehensive foot care, including the identification and appropriate referral of suspicious skin lesions.

Advocacy and Support Groups

Advocacy and support groups focused on skin cancer, including lentigo melanoma, provide valuable resources and support to individuals and their families. These groups raise awareness, offer educational materials, and provide a platform for individuals affected by lentigo melanoma to connect, share experiences, and seek support from others who have faced similar challenges.

For more information on podiatry and foot health, visit PrePodiatryClinic101.com.

lentigo melanoma