What is a cancerous growth composed of melanocytes?
Melanoma is a type of skin cancer that develops when melanocytes (the cells that give the skin its tan or brown color) start to grow out of control. Cancer starts when cells in the body begin to grow out of control. Cells in nearly any part of the body can become cancer, and can then spread to other areas of the body.
Are sacs within which each hair grows?
the follicle (pronounced: FAHL-ih-kul), a sac-like pit in the skin from which the hair grows.
What is an inflammatory skin disease with erythematous Papulovesicular lesions?
Dermatitis Herpetiformis DH is a skin disease characterized by papulovesicular lesions that occur symmetrically over the extensor surfaces of the extremities and the buttocks, trunk, neck, and scalp.
What is an acute allergic reaction with red round wheals develop?
Urticaria, also known as hives, is an outbreak of swollen, pale red bumps orplaques (wheals) on the skin that appear suddenly –either as a result of the body's adverse reaction to certain allergens, or forunknown reasons. Hives usually cause itching, but may also burn orsting.
What is a carcinoma?
Carcinoma is the most common type of cancer, accounting for 80% to 90% of all cancer diagnoses. Carcinoma forms in epithelial tissue which is tissue that lines your organs, internal passageways in your body and your skin.
What is a basal carcinoma?
Basal cell carcinoma is a type of skin cancer that most often develops on areas of skin exposed to the sun, such as the face. On white skin, basal cell carcinoma often looks like a bump that's skin-colored or pink. Basal cell carcinoma on brown skin.
What is the hair papilla?
Hair dermal papilla cells are specialized mesenchymal cells that exist in the dermal papilla located at the bottom of hair follicles. These cells play pivotal roles in hair formation, growth, and cycling.
What is the hair bulb?
The hair bulb forms the base of the hair follicle. In the hair bulb, living cells divide and grow to build the hair shaft. Blood vessels nourish the cells in the hair bulb, and deliver hormones that modify hair growth and structure at different times of life.
What are the 3 types of lesions?
Primary skin lesions tend to be divided into three groups:
- Lesions formed by fluid within the skin layers: Examples include vesicles and pustules.
- Lesions that are solid masses: Examples include nodules and tumors.
- Flat lesions: Examples include patches and macules.
Jul 14, 2022
What are the 5 types of skin lesions?
What are the different types of primary skin lesions?
- Blisters. Blisters are skin lesions filled with a clear fluid. …
- Macules. Macules are small spots that are typically brown, red, or white. …
- Nodules. …
- Papules. …
- Pustules. …
- Rashes. …
- Wheals.
Why is my whole body itches at night?
Circadian rhythm In the evening, the body releases more heat, and blood flow to the skin increases, which may contribute to nighttime itching. In addition, skin loses water at night, resulting in dryness that can make you itchy.
What does urticaria look like?
Hives are red raised bumps or welts on the skin. Hives (or urticaria) is a common skin reaction to something like an allergen (a substance that causes allergies). The spots can appear anywhere on the body and can look like tiny little spots, blotches, or large connected bumps.
What is neoplasm disease?
(NEE-oh-PLA-zum) An abnormal mass of tissue that forms when cells grow and divide more than they should or do not die when they should. Neoplasms may be benign (not cancer) or malignant (cancer). Benign neoplasms may grow large but do not spread into, or invade, nearby tissues or other parts of the body.
What is hyperplastic growth?
(HY-per-PLAY-zhuh) An increase in the number of cells in an organ or tissue. These cells appear normal under a microscope. They are not cancer, but may become cancer. Enlarge.
What is a squamous?
Squamous cells are thin, flat cells that look like fish scales, and are found in the tissue that forms the surface of the skin, the lining of the hollow organs of the body, and the lining of the respiratory and digestive tracts.
What is squamous carcinoma?
Squamous cell carcinoma of the skin is a common form of skin cancer that develops in the squamous cells that make up the middle and outer layers of the skin. Squamous cell carcinoma of the skin is usually not life-threatening, though it can be aggressive.
What are hair holes called?
Hair follicles are small, pocket-like holes in our skin. As the name suggests, they grow hair. The average human has about 100,000 hair follicles on the scalp alone, according to the American Academy of Dermatology.
What is Arrector Pili?
Arrector Pili Muscle – This is a tiny muscle that attaches to the base of a hair follicle at one end and to dermal tissue on the other end. In order to generate heat when the body is cold, the arrector pili muscles contract all at once, causing the hair to "stand up straight" on the skin.
What is Vellus hair?
Vellus hair (peach fuzz) is fine, short hair that grows all over your body, including your face, stomach, arms and legs. Vellus hair helps regulate your body temperature and protects your skin. Excess vellus hair growth can be a sign of some health conditions, such as Cushing's syndrome.
How can I reopen my hair follicles?
One very good medication to reactivate dormant hair follicles is minoxidil. Applied regularly to the scalp, minoxidil can re-grow hair that has completely stopped growing. The only caveat is that once you start taking it, you'll have to keep taking it indefinitely.
What is a macule?
A macule is a flat, distinct, discolored area of skin. It usually does not include a change in skin texture or thickness. The skin is the largest organ of the body. The skin and its derivatives (hair, nails, sweat and oil glands) make up the integumentary system.
What causes a macule?
Macules can be caused by various conditions that affect the appearance of your skin, resulting in areas of discoloration. Conditions that are likely to cause macules are: vitiligo. moles.
Are skin cancers itchy?
Skin cancers often don't cause bothersome symptoms until they have grown quite large. Then they may itch, bleed, or even hurt.
Why is my Vigina itchy inside?
Chlamydia, genital herpes, genital warts, trichomoniasis, gonorrhea and other organisms can cause vaginal/vulvar itching and irritation and other symptoms. Yeast infection (vaginal candidiasis). About three out of every four women will develop a yeast infection at some point in their lives.
Why does my belly fat itch?
The most common cause of an itchy belly is dry skin. If you love long, steamy showers, live in a cold climate, or use scented soaps, your skin might be irritated. Some people are more prone to dry skin than others. Dryness most often develops on the arms or legs, but it can also happen on your stomach.
What is meant by angioedema?
Definition. Angioedema is swelling that is similar to hives, but the swelling is under the skin instead of on the surface. Hives are often called welts. They are a surface swelling. It is possible to have angioedema without hives.
What are skin wheals?
About urticaria (hives) Urticaria – also known as hives, weals, welts or nettle rash – is a raised, itchy rash that appears on the skin. It may appear on one part of the body or be spread across large areas. The rash is usually very itchy and ranges in size from a few millimetres to the size of a hand.
What is Adenoma?
Listen to pronunciation. (A-deh-NOH-muh) A tumor that is not cancer. It starts in gland-like cells of the epithelial tissue (thin layer of tissue that covers organs, glands, and other structures within the body).
What is an adenocarcinoma?
Listen to pronunciation. (A-deh-noh-KAR-sih-NOH-muh) Cancer that forms in the glandular tissue, which lines certain internal organs and makes and releases substances in the body, such as mucus, digestive juices, and other fluids.
What is a metaplasia?
(meh-tuh-PLAY-zhuh) A change of cells to a form that does not normally occur in the tissue in which it is found.