Nodular melanoma (NM) is a type of melanoma that is highly aggressive and invasive. It originates in the epidermis, which is the outermost layer of the skin, and grows downward into the deeper layers of the skin.

NM typically presents as a pigmented bump on the skin that can rapidly evolve over a period of weeks to months. This type of melanoma accounts for about 15-20% of all cases of melanoma, and it is responsible for a disproportionate amount of morbidity and mortality due to its rapid growth, invasiveness, and high metastatic potential.

How to Detect NM?

NM can be difficult to diagnose because it often presents as a benign-looking bump on the skin that can easily be mistaken for a cyst, wart, or other benign lesion.

However, there are several key features that can help differentiate NM from other types of skin lesions:.

Unsuspecting Nodular Melanoma Images

Dark Color and Irregular Shape

Most NM lesions are darkly pigmented and exhibit a irregular shape. They may be brown, black, or various shades of red, blue, or purple. The lesion may also be raised or have an irregular border.

These features are not always present, but they are typical of NM.

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Relatively Rapid Growth

NM often exhibits a relatively rapid growth rate. The lesion may double in size over a few weeks. This rapid growth is one of the hallmarks of NM and is a key feature that distinguishes it from other benign skin lesions.

Ulceration and Bleeding

As the lesion grows, it may become ulcerated or bleed spontaneously. This is a sign that the lesion is invading deeper into the skin and that the prognosis may be poor.

How to Prevent NM?

The best way to prevent NM is to protect your skin from the sun by using sunscreen with an SPF of 30 or higher, wearing protective clothing, and avoiding prolonged exposure to the sun during peak hours.

You should also examine your skin regularly for any new or changing lesions and report any suspicious lesions to your healthcare provider.

Conclusion

Nodular melanoma is an aggressive and invasive type of melanoma that can be difficult to diagnose. It often presents as a pigmented bump on the skin that can easily be mistaken for a benign lesion.

However, there are several key features that can help to distinguish NM from other types of skin lesions. If you suspect that you may have NM, it is important to consult with your healthcare provider as soon as possible. Early detection and treatment are the keys to a favorable outcome.