Which term describes the skin lesion known as freckles?

Which term describes the skin lesion known as freckles?

Macules represent a change in color and are not raised or depressed compared to the skin surface. A patch is a large macule. Examples include freckles, flat moles, tattoos, and port-wine stains.

Which term describes a loss of pigment in areas of the skin?

Vitiligo is a condition in which the skin loses its pigment cells (melanocytes). This can result in discolored patches in different areas of the body, including the skin, hair and mucous membranes.

What is Urtic O?

Urtic/o. Combining form that means dry.

Which form of skin cancer is derived from cells capable of forming melanin?

Melanoma is a malignant tumor originating from transformed melanocytes – cells that normally produce melanin1.

Which term describes a discolored flat skin lesion such as a freckle?

A macule is a flat, distinct, discolored area of skin less than 1 centimeter (cm) wide. It doesn’t involve any change in the thickness or texture of the skin.

Which term describes the black pigment that determine skin color?

These cells produce a pigment called melanin, which gives the skin its color and also protects against sunlight.

What is discoloration of skin?

Discoloration of the skin is characterized by darker or lighter markings on skin. Our skin contains melanin that is responsible for the color of our skin. However, it also means that the pigmentation of our skin can sometimes become uneven with an increase or decrease in melanin, leading to discoloration of the skin.

Which pigment determines the Colour of the human skin?

Melanin
Melanin content of skin is the main determining factor of skin and hair colour; hair is considered a form of skin with regards to pigmentation. Melanin is synthesized by melanosomes found in skin cells called melanocytes.

What are coarse pigmented hairs called?

Lanugo fine unpigmented fetal hair. Vellus Fine unpigmented children & women. Terminal Coarse long pigmented hair of scalp. Base surrounded by sensory nerves(root hair plexus) located deep in dermis.

What is a small flat colored spot on the skin?

Macule. A macule is a small discoloration on the skin that is flat and distinct and less than 1 centimeter in diameter. It does not cause a change in skin texture or thickness. Macules can only be noticed visually and can take a variety of shapes, including round.

How big is a nonpalpable skin lesion in diameter?

Cross-section of the skin and skin structures Lesion Type (Primary Morphology) Macules are flat, nonpalpable lesions usually < 10 mm in diameter. Macules represent a change in color and are not raised or depressed compared to the skin surface.

What kind of skin lesions have a straight line?

Linear lesions take on the shape of a straight line and are suggestive of some forms of contact dermatitis, linear epidermal nevi, and lichen striatus. Traumatically induced lesions, including excoriations caused by the patient’s fingernails, are typically linear. Annular lesions are rings with central clearing.

What kind of skin lesions are found in the face?

Location and Distribution. Vitiligo may be patchy and isolated or may group around the distal extremities and face, particularly around the eyes and mouth. Discoid lupus erythematosus has characteristic lesions on sun-exposed skin of the face, especially the forehead, nose, and the conchal bowl of the ear.

What do vesicles mean in dermatologic disorders?

Vesicles are characteristic of herpes infections, acute allergic contact dermatitis , and some autoimmune blistering disorders (eg, dermatitis herpetiformis ). Image courtesy of the Public Health Image Library of the Centers for Disease Control and Prevention.