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msk-derm > Benign Skin Neoplasms > Flashcards

Benign Skin Neoplasms Flashcards

1
Q

A 42 y.o. male presents with a new mole that is sometimes itchy and bled once. What is the most likely diagnosis?

A

Seborrheic keratosis

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2
Q

What are seborrheic keratoses?

A

Benign superficial growths that can arise on all body surfaces except palms and soles

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3
Q

What is the appearance of seborrheic keratoses?

A

Superficial raised epidermal growths, stuck-on quality, sometimes have fissures or cracks on the surface, color is tan/brown/black

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4
Q

What are these lesions?

A

Seborrheic keratosis

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5
Q

The image on the left is normal skin, what is the image on the right?

A

Seborrheic keratosis

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6
Q

What are these lesions on the patient’s back?

A

Seborrheic keratoses

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7
Q

What are these spots on the patient’s dorsal hands?

A

Solar lentigo (sun spots)

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8
Q

Do solar lentigines suggest cancer likelihood?

A

They are not precancerous, but they can reflect extensive solar history which is a cancer risk

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9
Q

What is the appearance of solar lentigo?

A

Flat light brown macules (lighter than typical nevi) that are common on sun damaged skin on sun exposed areas

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10
Q

What is this?

A

Solar lentigo

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11
Q

What is this?

A

Solar lentigo

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12
Q

What are the histological features of solar lentigo?

A

Pigmented rete ridges, solar elastosis, increased melanin without increased melanocytes

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13
Q

What are the key differences between solar lentigo and melanoma?

A

Melanoma is darker, there are usually multiple, and the color is variable. Melanoma is also usually larger and evolving

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14
Q

What are these?

A

Acrochordons (skin tags)

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15
Q

What is the appearance of skin tags?

A

Soft fleshy papules that arise in axillae, neck, groin, eyelids. They can be skin colored or hyperpigmented. They are often attached to skin with a small stalk.

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16
Q

What is this?

A

Acrochordons (skin tags)

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17
Q

What is this slightly raised firm pink papule?

A

Dermatofibroma

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18
Q

What is the appearance of dermatofibromas?

A

Single small round firm papules (0.5-1 cm), pink/reddish brown/sometimes hyperpigmented

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19
Q

What is the dimple sign?

A

A puckering of pink papule when pinched that suggests dermatofibroma

20
Q

What is this?

A

Keloid

21
Q

What is the appearance of keloids?

A

Firm, hyperpigmented, pink or red plaque or nodule, often shiny or smooth surface

22
Q

What usually triggers a keloid?

A

They usually occur at the site of previous known tissue trauma (cut, piercing, burn, acne, etc)

23
Q

What is this?

A

Keloid

thick collagen nodules containing high density unidirectional collagen fibrils and fibroblasts

24
Q

What causes keloid formation?

A

Imbalance of too much collagen production, too little degradation

25
Q

What is this?

A

Cherry angioma

26
Q

What are these?

A

Cherry angiomas

27
Q

What is the appearance of cherry angiomas?

A

Shiny bright red papules

28
Q

What is this?

A

Cherry angioma - raised bump with dilated capillaries

29
Q

What is the appearance of cherry angioma on histology?

A

Raised bump with dilated capillaries

30
Q

What is this lesion that bleeds with minimal trauma?

A

Pyogenic granuloma

31
Q

What is the appearance of pyogenic granulomas?

A

Eruptive, small solitary, sessile or pedunculated vascular (red), raised papules

bleeds easily with trauma, relative quick onset

32
Q

What are these?

A

Pyogenic granuloma

33
Q

What is this?

A

Pyogenic granuloma

skin protrusion with dermis and dilated capillaries

34
Q

What is this nodule that bursts with white foul-smelling materials?

A

Epidermal inclusion cyst (EIC)

35
Q

What is the presentation of an epidermal inclusion cyst?

A

A mobile subcutaneous nodule, often with overlying punctum

36
Q

What is the cause of epidermal inclusion cysts?

A

They arise from dilated hair follicles that fill with debris and collects a sac of foul-smelling cheesy white material

37
Q

What is this?

A

Epidermal inclusion cyst

38
Q

What is this?

A

Lipoma

39
Q

What is the appearance of a lipoma?

A

Soft, ill-defined, rubbery, painless, subcutaneous nodule

40
Q

What are these bumps that do not resolve with acne cream?

A

Sebaceous hyperplasia

41
Q

What is the appearance of sebaceous hyperplasia?

A

Cream colored or yellowish papule with central depression, usually located on face and multiple in number

42
Q

What is this?

A

Sebaceous hyperplasia

43
Q

What is this?

A

Sebaceous hyperplasia

44
Q

What is this?

A

Hemangioma

45
Q

What is the most common benign tumor of childhood?

A

Hemangioma

46
Q
A

msk-derm (41 decks)

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