What is the classification of melanoma?

Melanomas are classified into 4 major types based on growth pattern. They are superficial spreading melanoma, nodular melanoma, lentigo maligna melanoma, and acral lentiginous melanoma. Other more unusual types include mucosal lentiginous melanoma, desmoplastic melanoma, and verrucous melanoma.

What are the most common sites for the melanoma to metastasize?

The most common clinically apparent sites of distant metastases in melanoma patients are: skin, lung, brain, liver, bone, and intestine [48]. Metastasis to lung is common and often the first clinically apparent site of visceral metastasis.

What is the difference between Breslow and Clark?

The Clark scale is used to determine how many layers of the skin the melanoma has grown into; the Breslow scale is used to determine how thick the melanoma is. The melanoma cells are only in the top layer of the skin, the epidermis.

What is Level 4 melanoma?

Thus, a Level IV melanoma means a melanoma tha has invaded through a few of the skin layers, but if it is less than 1mm thick, it is only considered to be Stage I disease. But a Stage IV melanoma means the melanoma has spread throughout the body, and usually has very poor prognosis.

What is the most common subtype of melanoma?

Superficial spreading melanoma is the most common type of melanoma skin cancer. It makes up about 70% of all melanoma skin cancers.

Where does melanoma usually spread first?

Normally, the first place a melanoma tumor metastasizes to is the lymph nodes, by literally draining melanoma cells into the lymphatic fluid, which carries the melanoma cells through the lymphatic channels to the nearest lymph node basin.

Why is Breslow thickness important?

Breslow thickness is the main measurement your doctor uses to give information about your outlook. They use the Breslow thickness in another staging system for melanoma called the TNM staging system. Staging a cancer helps doctors decide on the treatment you need.

What is Breslow depth melanoma?

Breslow depth is a measurement (in millimeters) from the surface of the skin to the deepest component of the melanoma. Tumor thickness: Known as Breslow thickness or Breslow depth, this is a significant factor in predicting how far a melanoma has advanced.

What is a Level 3 melanoma?

Stage III melanoma, also known as regional melanoma, has metastasized (spread) to nearby lymph nodes, lymph vessels, or skin. Lymph nodes are an important part of the lymphatic system, which is a vast network of tissues and organs that helps rid the body of waste, toxins, and other unwanted materials.

What does Level 2 melanoma mean?

Stage 2 melanoma means the tumor is more than 1 mm thick and may be larger or have grown deeper into the skin. It may be ulcerated or not ulcerated. The cancer has not spread to nearby lymph nodes or to distant parts of the body.

What are the 3 types of melanoma?

Types of Melanoma

• Superficial spreading melanoma is the most common type of melanoma.
• Nodular melanoma is the second most common type of melanoma.
• Lentigo maligna melanoma tends to develop on the face, scalp, or neck.
• Acral lentiginous melanoma is a rare condition that affects people of all races and backgrounds.

Are there two types of melanoma?

Melanoma skin cancer is also called cutaneous melanoma and malignant melanoma of the skin. There are 4 main types of melanoma skin cancer – superficial spreading, nodular, lentigo maligna and acral lentiginous.

What is the genomics of melanoma subtypes?

Herein we review the genomics of melanoma subtypes including cutaneous, acral, uveal and mucosal, with a focus on the prognostic and predictive significance of key molecular aberrations. © 2018 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.

What are the different types of melanoma?

In fact, dermatologists and physicians often talk about four subtypes of melanoma. The four most common subtypes of melanoma are acral lentiginous, superficial spreading, nodular and lentigo maligna.

What is the relationship between BRAF mutation and melanoma?

Melanomas that arise on skin with intermittent sun exposure are generally more likely to have a BRAF mutation compared with melanomas occurring on chronically sun-exposed skin 8. Melanomas with BRAF mutations are also more common in younger patients, in the superficial spreading histopathologic subtype and on the trunk 9, 10.

What is the pathophysiology of melanoma?

Melanoma is characterised by its ability to metastasise at early stages of tumour development. Current clinico-pathologic staging based on the American Joint Committee on Cancer criteria is used to guide surveillance and management in early-stage disease, but its ability to predict clinical outcome …