skin cancer Flashcards

0
Q

The damaged cells being to:

A

Grow & divide uncontrollably

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1
Q

Cancer develops when DNA becomes:

A

Damaged & the body can’t repair the damage

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2
Q

Skin cancers are divided into what two classes?

A

Nonmelanoma & melanoma

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3
Q

What is the deadliest form of skin cancer?

A

Melanoma

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4
Q

What is the most common cancer in humans?

A

basal cell carcinoma (BCC)

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5
Q

BCC develops in how many people every year in the United States?

A

1 million

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6
Q

About what percentage of all skin cancers are BCC?

A

80%

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7
Q

Where are basal cells located?

A

In the lowest layer of the epidermis

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8
Q

How can BCC appear?

A

Shiny translucent or pearly nodule(sore that continuously heals and then reopens)

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9
Q

Where do most BCCs appear?

A

face, ears, scalp, & upper trunk

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10
Q

BCC tend to what?

A

Grow slowly

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11
Q

In BCC, what do dermatologists encourage?

A

Diagnosis and treatment to prevent extensive damage to surrounding tissue

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12
Q

About 16% of diagnosed skin cancers are:

A

Squamous cell carcinoma (SCC)

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13
Q

What percentage of skin cancer is SCC?

A

16%

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14
Q

Where does squamous cell carcinoma begin?

A

Squamous cells

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15
Q

Where does BCC develop?

A

Basal cells

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16
Q

Where are squamous cells located?

A

Upper layer of the epidermis

17
Q

About how many cases of SCC are diagnosed every year?

A

200,000

18
Q

Where does SCC tend to develop?

A

Fair skinned middle aged & elderly people who have had long term sun exposure

19
Q

What does SCC appear as?

A

A crusted or scaly area of skin with a red inflamed base that resembles a growing tumor

20
Q

Where does SCC develop?

A

Anywhere(inside mouth & genitalia)

21
Q

What are actinic keratoses?

A

Dry, scaly lesions(sores) that may be skin colored, reddish-brown or yellowish-black

22
Q

What does SCC require?

A

Early treatment to prevent metastasis(spreading)

23
Q

About 4% of diagnosed skin cancers are:

A

Melanoma

24
Q

What percentage of skin cancer is melanoma?

A

4%

25
Q

Where does melanoma begin?

A

Melanocytes

26
Q

What are melanocytes?

A

Cells within the epidermis that give the skin its color

27
Q

What was melanoma coined?

A

The most lethal form of skin cancer

28
Q

Why is melanoma the most lethal skin cancer?

A

Because it can rapidly spread to the lymph system and internal organs

29
Q

What is the cure rate for melanoma?

A

95%

30
Q

Once melanoma spreads, the prognosis is _______

A

Poor

31
Q

Where does melanoma often develop?

A

In a pre-existing mole or looks like a new mole

32
Q

What percentage of nonmelanoma skin cancers are diagnosed?

A

1%

33
Q

About 1% of diagnosed skin cancers are:

A

Nonmelanoma skin cancers (NSS)

34
Q

What do Nonmelanoma skin cancers include?

A

Merkel cell carcinoma, dermatofibromasarcoma protuberans, Paget’s disease and cutaneous t-cell lymphoma

35
Q

What is the leading cause of skin cancer?

A

Sun exposure

36
Q

Meaning one half is different than another

A

Asymmetry

37
Q

The edge, or border, of melanomas are usually ragged, notched, or blurred

A

Border irregularity

38
Q

Benign moles can be any _____, but a single mole will only be one ______

A

Color

39
Q

Melanomas continue to grow, while moles remain small

A

Diameter