Neoplasm Pictures

Malignant Melanoma

Mon 15 Feb 2016 14:42:00 +0200

Melanocytes are derived from a structure in the human embryo called the neural crest. They are distributed in the epidermis and thus are found throughout the skin. They produce a brown pigment known as melanin and are responsible for racial variation in skin color as well as the color of moles. Malignant degeneration of the melanocyte gives rise to the tumor known as melanoma, which has four subtypes. These are: superficial spreading, nodular, lentigo maligna, and acral lentiginous melanomas, accounting for 70%, 15% to 30%, 4% to 10%, and 2% to 8% of cases, respectively. Malignant melanoma may develop anywhere on the body. In men, it is most common on the trunk. In women, it is most common on the back or legs. The subtype also may influence where the tumor develops; lentigo melanoma is more common on the face while acral lentiginous melanoma is more common on the palms of the hand, soles of the feet, or in the nail beds.

The locally invasive characteristic of this tumor involves vertical penetration through the skin and into the dermis and subcutaneous (under-the-skin) tissues of the malignant melanocytes. With the exception of the nodular variety of melanoma, there is often a phase of radial or lateral growth associated with these tumors. Since it is the vertical growth that characterizes the malignancy, the nodular variant of melanoma carries the worst prognosis. Fortunately, the superficial spreading type is most common.

The primary tumor begins in the skin, often from the melanocytes of a pre-existing mole. Once it becomes invasive, it may progress beyond the site of origin to the regional lymph nodes or travel to other organ systems in the body and become systemic in nature.

Lymph is the clear, protein-rich fluid that bathes the cells throughout our body. Lymph will work its way back to the bloodstream via small channels known as lymphatics. Along the way, the lymph is filtered through cellular stations known as nodes, thus they are called lymph nodes. Nearly all organs in the body have a primary lymph node group filtering the tissue fluid, or lymph, that comes from that organ. Different areas of the skin have different primary nodal stations. For the leg, they are in the groin. For the arm, the armpit or axilla. For the face, it is the neck. Depending where on the torso the tumor develops, it may drain into one groin or armpit, or both.

Cancer, as it invades in its place of origin, may also work its way into blood vessels. If this occurs, it provides yet another route for the cancer to spread to other organs of the body. When the cancer spreads elsewhere in the body, it has become systemic in extent and the tumor growing elsewhere is known as a metastasis. Untreated malignant melanoma follows a classic progression. It begins and grows locally, penetrating vertically. It may be carried via the lymph to the regional nodes, known as regional metastasis. It may go from the lymph to the bloodstream or penetrate blood vessels, directly allowing it a route to go elsewhere in the body. When systemic disease or distant metastasis occur, melanoma commonly involves the lung, brain, liver, or occasionally bone. The malignancy causes death when its uncontrolled growth compromises vital organ function.

Basalioma

Mon 15 Feb 2016 14:41:00 +0200

Basal cell carcinoma starts in the top layer of the skin called the epidermis. Most basal cell cancers occur on skin that is regularly exposed to sunlight or other ultraviolet radiation. This includes the top of your head, or scalp. Basal cell skin cancer is most common in people over age 40. However, it occurs in younger people, too.
You are more likely to get basal cell skin cancer if you have:
Light-colored or freckled skin
Blue, green, or grey eyes
Blond or red hair
Overexposure to x-rays or other forms of radiation
Many moles
Close relatives who have or had skin cancer
Many severe sunburns early in life
Long-term daily sun exposure (such as the sun exposure people who work outside receive)

Basal cell skin cancer grows slowly and is usually painless. It may not look that different from your normal skin. You may have a skin bump or growth that is:
Pearly or waxy
White or light pink
Flesh-colored or brown

In some cases the skin may be just slightly raised or even flat. You may have:
A skin sore that bleeds easily
A sore that does not heal
Oozing or crusting spots in a sore
A scar-like sore without having injured the area
Irregular blood vessels in or around the spot
A sore with a depressed (sunken) area in the middle

Signs of Melanoma

Mon 15 Feb 2016 14:34:00 +0200

Melanomas can develop anywhere on your body. They most often develop in areas that have had exposure to the sun, such as your back, legs, arms and face. Melanomas can also occur in areas that don't receive much sun exposure, such as the soles of your feet, palms of your hands and fingernail beds. These hidden melanomas are more common in people with darker skin.

The first melanoma signs and symptoms often are:
A change in an existing mole
The development of a new pigmented or unusual-looking growth on your skin Melanoma doesn't always begin as a mole. It can also occur on otherwise normal-appearing skin.

Normal moles are generally a uniform color — such as tan, brown or black — with a distinct border separating the mole from your surrounding skin. They're oval or round and usually smaller than 1/4 inch (about 6 millimeters) in diameter — the size of a pencil eraser. Most people have between 10 and 45 moles. Many of these develop by age 50, although moles may change in appearance over time — some may even disappear with age.

To help you identify characteristics of unusual moles that may indicate melanomas or other skin cancers, think of the letters ABCDE:
A is for asymmetrical shape. Look for moles with irregular shapes, such as two very different-looking halves.
B is for irregular border. Look for moles with irregular, notched or scalloped borders — characteristics of melanomas.
C is for changes in color. Look for growths that have many colors or an uneven distribution of color.
D is for diameter. Look for new growth in a mole larger than 1/4 inch (about 6 millimeters).
E is for evolving. Look for changes over time, such as a mole that grows in size or that changes color or shape. Moles may also evolve to develop new signs and symptoms, such as new itchiness or bleeding. Cancerous (malignant) moles vary greatly in appearance. Some may show all of the changes listed above, while others may have only one or two unusual characteristics.

Melanomas can also develop in areas of your body that have little or no exposure to the sun, such as the spaces between your toes and on your palms, soles, scalp or genitals. These are sometimes referred to as hidden melanomas because they occur in places most people wouldn't think to check. When melanoma occurs in people with darker skin, it's more likely to occur in a hidden area.

Melanoma under a nail. Acral-lentiginous melanoma is a rare form of melanoma that can occur under a fingernail or toenail. It can also be found on the palms of the hands or the soles of the feet. It's more common in blacks and in other people with darker skin pigment.
Melanoma in the mouth, digestive tract, urinary tract or vagina. Mucosal melanoma develops in the mucous membrane that lines the nose, mouth, esophagus, anus, urinary tract and vagina. Mucosal melanomas are especially difficult to detect because they can easily be mistaken for other far more common conditions.
Melanoma in the eye. Eye melanoma, also called ocular melanoma, most often occurs in the uvea — the layer beneath the white of the eye (sclera). An eye melanoma may cause vision changes and may be diagnosed during an eye exam.

Signs of Skin Cancer

Sun 14 Feb 2016 01:27:00 +0200

Skin cancers may look like:
A spot or sore that does not heal within 4 weeks
A spot or sore that itches, hurts, is scabbed or crusty, or bleeds for more than 4 weeks
Areas where the skin has broken down (an ulcer) and doesn't heal within 4 weeks, and you can't think of a reason for this change
An ulcer is an area that is breaking down and begins to get deeper. This can be called erosion.

Basal cell skin cancers look like a small, slow growing, shiny, pink or red lump. They can also look like red scaly patches. If left, basal cell skin cancers tend to become crusty, bleed, or develop into an ulcer. They are commonest on the face, scalp, ears, hands, shoulders and back.

Squamous cell skin cancers are usually pink lumps. They may have hard or scaly skin on the surface. They are often tender, but not always. They can bleed easily and develop into an ulcer. They are commonest on the face, neck, lips, ears, hands, shoulders, arms and legs.

Facial Skin Cancer

Sun 14 Feb 2016 01:22:00 +0200

Skin cancer may initially appear as a bump, nodule or irregular patch on the surface of the skin. As the cancer grows, the size or shape of the visible skin mass may change. As these visible changes are occurring, the cancer is likely expanding and moving into the lower layers of the skin. If left untreated, skin cancer will continue to grow down into the dermis and the subcutaneous tissues. In the most advanced stages, skin cancer may spread into nearby muscle tissue, cartilage or bone. Once the cancer spreads into the blood or lymph fluids, it may reach other areas in the body, like the liver or lungs. Types of skin cancer include melanoma, basal cell carcinoma and squamous cell carcinoma.

Melanoma in Children

Tue 09 Feb 2016 22:26:00 +0200

Melanoma is a malignant tumour that starts in melanocytes. Melanocytes are a type of cell that make melanin, which is the pigment that gives your skin and eyes their colour. Malignant means that it can spread, or metastasize, to other parts of the body.

The skin is the body’s largest organ. It covers your whole body and protects it from injury, infection and ultraviolet (UV) light from the sun. The skin helps control your body temperature and gets rid of waste materials through the sweat glands. It also makes vitamin D and stores water and fat.

The skin has 2 main layers. The top layer, on the surface of the body, is called the epidermis. The dermis is below the epidermis. It has nerves, blood vessels, sweat glands, oil (sebaceous) glands and hair follicles. The epidermis is made up of 3 types of cells:
Squamous cells are flat, thin cells on the surface of the skin.
Basal cells are round cells that lie under the squamous cells.
Melanocytes are found in between the basal cells.

Cells in the skin sometimes change and no longer grow or behave normally. These changes may lead to non-cancerous, or benign, tumours such as dermatofibromas, epidermal cysts or moles (also called nevi).

Changes to cells in the skin can also cause cancer. Different types of skin cells cause different types of skin cancers. When cancer starts in melanocytes, it is called melanoma. When skin cancer starts in squamous cells or basal cells, it is called non-melanoma skin cancer. Find out more about non-melanoma skin cancer.

When melanocytes change and become abnormal, they can cause precancerous conditions. This means that the cells are not yet cancer but there is a higher chance these abnormal changes may become cancer. An atypical mole, or dysplastic nevus, is a precancerous condition of the skin that is more likely than ordinary moles to develop into melanoma. Another precancerous condition caused by changes to melanocytes is called congenital melanocytic nevi. In some cases, congenital melanocytic nevi may develop into melanoma.

Melanoma usually starts on the skin. The most common type of melanoma is called superficial spreading melanoma. The second most common type of melanoma skin cancer is nodular melanoma. Other types of melanoma are lentigo maligna melanoma and acral lentiginous melanoma.

Melanoma can also start in other parts of the body where melanocytes are found, but these types of melanoma are rare. They include mucosal lentiginous melanoma, which can develop in mucous tissue anywhere in the body such as internal organs, the mouth or the vagina. Intraocular melanoma is another rare type of melanoma. It can develop in the eyeball.

Nodular Melanoma

Mon 01 Feb 2016 22:46:00 +0200

Nodular melanoma may arise on any site, but is most common on exposed areas of the head and neck. Nodular melanoma presents as a rapidly enlarging lump (over several weeks to months). The characteristics of nodular melanoma include:
Larger size than most moles – >6 mm and often a centimetre or more in diameter at diagnosis
Dome-shaped, often symmetrical firm lump
Single colour or variable pigmentation – most often black, red or skin coloured
Smooth, rough, crusted or warty surface
Ulceration or bleeding
Itching or stinging
One-third of nodular melanomas are not pigmented. They lack the ABCD melanoma warning signs. (Asymmetry, Border irregularity, Colour variation, large Diameter).

Nodular melanoma is due to the development of malignant pigment cells (melanocytes) along the basal layer of the epidermis. These cells may occasionally arise from an existing melanocytic naevus (about 3%) but commonly arise within another type of melanoma or in previously normal-appearing skin. What triggers the melanocytes to become malignant is unknown, but it is likely to be a series of changes to the DNA. NRAS mutations are often found in patients with nodular melanomas.

It is essential to diagnose nodular melanoma accurately. Clinical diagnosis is aided by dermoscopy and skin biopsy (usually excision biopsy). Those with melanoma that is more than 1 mm thick may be advised to have lymph node biopsy, imaging studies and blood tests.

Skin Cancer

Mon 01 Feb 2016 21:25:00 +0200

Most cancers have some pretty obvious signs. Lumps and bumps, tenderness, pain or sickness. But when it comes to the symptoms of skin cancer, they hardly jump out and bang you over the head. Skin cancer or melanoma is slow growing and often free of obvious symptoms. That can make early detection tricky. But don't worry because there are a few things that you can keep an eye out for when it comes to skin cancer and which are pretty good indicators that a trip to the doctor might be a good idea. In no way do these signs and symptoms automatically mean cancer – but there's no harm in checking things out if you have suspicions.

Skin Cancer in Children

Mon 01 Feb 2016 21:25:00 +0200

Skin cancer is the growth of abnormal cells capable of invading and destroying other associated skin cells. Skin cancer is often subdivided into either melanoma or non-melanoma. Melanoma is a dark-pigmented, usually malignant, tumor arising from a skin cell capable of making the pigment melanin (a melanocyte). Melanoma can spread throughout the body via the bloodstream or lymphatic system. Non-melanoma skin cancer most often originates from the external skin surface as a squamous cell carcinoma or a basal cell carcinoma.

Basal cell carcinoma affects the skin's basal layer and has the potential to grow progressively larger in size, although it rarely spreads to distant areas (metastasizes). Basal cell carcinoma accounts for 80% of skin cancers (excluding melanoma), whereas squamous cell cancer makes up about 20%. Squamous cell carcinoma is a malignant growth of the external surface of the skin. Squamous cell cancers metastasize at a rate of 2–6%, with up to 10% of lesions affecting the ear and lip.

Skin Cancer on Hands

Mon 01 Feb 2016 21:25:00 +0200

It is well known that excessive sun exposure can promote the development of many skin cancers. The 3 main types of skin cancer are melanoma, basal cell carcinoma (BCC), and squamous cell carcinoma (SCC). Melanoma is the most deadly skin cancer because it spreads (metastasizes) more readily than the other forms of skin cancer. Basal cell carcinoma is the most common form of skin cancer, and it typically does not spread. Squamous cell carcinoma is the second most common form of skin cancer, and while it can spread, it does not do so as commonly as melanoma. The risk of getting basal cell carcinoma or squamous cell carcinoma is determined by a person's lifetime exposure to sun and the person's skin color, with pale skin being more prone to skin cancer.

Your awareness of the signs of skin cancer might allow you to find an early lesion on yourself or a loved one, before it is a significant health problem. Pre-cancerous skin changes include red, scaly lesions (especially on the face, ears, and backs of the hands) called actinic keratoses. When on the lip (usually the lower lip), it is called actinic cheilitis. Actinic keratoses are considered to be premalignant lesions as 1 in 100 cases per year will develop into squamous cell carcinoma. Moles that have started to itch or bleed or change in color or shape are also warning signs of possible melanoma.

Moles can be found in sun-exposed or clothing-covered areas. Although it is normal to acquire new moles from childhood through young adulthood, it is unusual to acquire a mole in the adult years. Most moles are normal; atypical moles are seen in any area of the skin, including non-sun-exposed areas. These moles are larger and more irregular in color and shape than normal moles, and they serve as an indicator that the person with these types of moles may be more prone to developing melanoma.

Skin Cancer on Nose

Mon 01 Feb 2016 21:24:00 +0200

Skin cancer, the most common type of cancer, results from the abnormal and uncontrollable growth of skin cells. Skin cancers can affect many parts of the body, such as the trunk, legs, arms and face and most often affect areas exposed to the sun. The fact that noses protrude from the face makes it more vulnerable to sustaining damage from the sun's ultraviolet rays. Excessive sun exposure increases the risk of developing one of the types of skin cancer.

Basal cell carcinoma is the most common type of non-melanoma skin cancer, as well as the most common type of nose cancer. It begins in the basal cells. Basal cells reside in the deepest part of the epidermis---the outer layer of skin. Basal cells function to produce more keratinocytes, the main type of cell found in skin. A sore or lesion on the nose that fails to heal often indicates the presence of skin cancer. The appearance of the lesion can help determine the type of cancer present. Basal cell carcinoma often produces sores that look pearly white or waxy. The white waxy area may look like a scar, making it easy to overlook. Basal cell carcinomas grow slowly and rarely spread to nearby lymph nodes or distant organs. They can, however, cause extensive damage to surrounding tissues. Although easy to treat, basal cell carcinoma causes a high recurrence rate.

Squamous cell carcinoma, also classified as a non-melanoma cancer, is the second most common type of cancer that can affect the nose, and begins in the flat cells located in the outermost layer of epidermis known as the stratus corneum. These flat cells, known as squamous cells, form the final layer of living cells in the epidermis. Squamous cell carcinoma accounts for approximately 20 percent of the nearly 1 million cases of skin cancer diagnosed each year, as reported in 2010 by the American Academy of Dermatology. Squamous cell carcinoma produces a red patch on the skin, often appearing scaly or crusted. A red nodule that feels firm to the touch may also indicate squamous cell carcinoma. Squamous cell carcinoma is more aggressive than basal cell carcinoma if left untreated, and can spread to nearly lymph nodes or metastasize to other organs.

Melanoma. Skin contains two main types of cells: the keratinocytes that produce the protein keratin, and melanocytes that produce the pigment called melanin. Melanoma cancers begin in the melanocytes. Benign tumors of the melanocytes, known as moles, often make it difficult to detect the presence of melanoma cancer. Because melanomas begin in the melanocytes, these cancers usually produce skin lesions that look brown or black, but may also cause a lesion with no color. Melanomas can develop anywhere on the body, but most often develop in areas that have had exposure to the sun including the nose and the rest of the face. If left untreated, melanomas can spread to the lymph nodes and other organs in the body. Although much less common than the other types of skin cancer, melanoma causes the most skin cancer deaths, as reported by the American Cancer Society.

Skin Cancer on Leg

Mon 01 Feb 2016 21:24:00 +0200

Cancer builds up if the molecule present in tissue cells responsible of the encoding of genetic information, DNA, turns out to be defective and the human body won`t be able to fix the deterioration. The defective cells start to expand as well as dividing with no control. When this happens within the skin, skin cancer builds up. When the harmful cells increase in numbers, they develop a tumor. Due to the fact that skin cancer typically evolves within the outer layers of skin, the epidermis, the tumor will likely be precisely observable. As a result, the majority of skin cancers is noticeable during the early stages.

Skin cancer is a very serious problem and one of the most common types of cancer. Many people tend to ignore the warning signs when the skin is involved, or at least until it really starts to bother them. However, because the disease can be just as deadly as any other type of cancer, you should be aware of the symptoms of skin cancer so that you can know to seek medical attention.

One of the most obvious skin cancer symptoms is a change in your skin, such as a new mole or a lesion. If this suddenly appears, especially if it changes after a relatively short period of time, you should immediately see your doctor. Skin cancer will generally affect any areas on the body that are exposed to the sun, especially the face but also the hands, neck, arms, scalp, lips, ears and chest. More uncommonly, it could affect the palms of the hands, between the toes, beneath the fingernails or toenails and even the genital area.

Most often, you will notice a brown spot as symptoms, especially a raised mole or bump in the affected area. The mole may have darker speckles over its surface, and any mole that changes in color or becomes larger in size or bleeds should be seen as a possible sign of skin cancer. If you notice such a skin issue, make an appointment to see a dermatologist as soon as possible. You can also consult your primary care physician, though he or she might refer you to a dermatologist or to another facility where you can have a biopsy done of the mole.