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Dermatology > Nevus > Flashcards

Nevus Flashcards

1
Q

Types of nevus

A

Melanocytic nevus
Neurocutaneous melanosis
Nevus spilus
Halo nevus
Dysplastic nevus
Spitz nevus
Pigmented spindle cell nevus
Congenital dermal melanosis
Blue nevus

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2
Q

Congenital melanocytic nevus

A

Large lesion
Bathing trunk nevus
Giant hairy nevus

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3
Q

Bathing trunk nevus

A

Involves entire body segment

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4
Q

Feature of congenital melanocytic nevi that is different from acquired is

A

Hair presence and
Pigmentation

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5
Q

Prognosis of congenital melanocytic nevi

A

Risk of malignant melanoma

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6
Q

Therapy goals

A

Avoid malignant melanoma
Cosmetic improvement

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7
Q

Therapy

A

Excision of small and medium nevi

Excision of large is not possible

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8
Q

Neurocutaneous melanosis

A

Leptomeningeal involvement

Leptomeningeal malignant melanoma

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9
Q

Diagnosis of neurocutaneous melanosis

A

Physical examination
With ophthalmology and
Neurology

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10
Q

Nevus spilus

A

Speckled lentiginous nevus

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11
Q

Is nevus spilus congenital

A

Yes

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12
Q

Clinical features of nevus spilus

A

Lentigens, macule, papule

Systemic findings maybe present like
Nevus spilus syndrome
Hyperhydrosis
Pharmacomatosis pigmentokeratosis

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13
Q

Nevus spilus differential diagnosis

A

Becker nevus

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14
Q

Therapy

A

Excision
Malignant melanoma risk is low

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15
Q

Acquired melanocytic nevus

A

Benign proliferation of melanocytes
Most common

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16
Q

Acquired nevus pathogenesis

A

Sun exposure
Hormones (puberty and pregnancy)
Immunosupression

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17
Q

Clinical features of acquired nevus

A

Patient has 20-40 nevi
Start tan macule that becomes dark
And becomes papule or nodule
Surface papillomatous or smooth

18
Q

Differential diagnosis

A

Non pigmented nevi may be mistaken for skin tags or neurofibromas

19
Q

Prognosis of acquired nevus

A

Greater than 50 nevus increased risk of melanoma

20
Q

Therapy

A

Excision

21
Q

Halo nevus

A

Sutton nevus

Melanocytic nevus surrounded by hypopigmentation

22
Q

Pathogenesis of halo nevus

A

Lymphocytic response attacks nevus and makes nevus disappear
Sunburn

23
Q

Halo nevus clinical features

A

Papular nevus surrounded by white halo
Later nevus disappears and pigmentation comes back

24
Q

Therapy

A

Excision

25
Q

Dysplastic nevus

A

Atypical nevus
Irregular border
Large size

26
Q

Epidemiology of dysplastic nevus

A

Maybe genetic

27
Q

Pathogenesis of dysplastic nevus

A

Hormones and sun exposure

28
Q

Clinical features of dysplastic nevus

A

ABCDE rule
Asymmetry
Border, irregular border
Colour, multiple colour
Diameter more than 6mm
Elevation or Enlarging: papule is harmless
Flat to nodular is suspicious

29
Q

Fried egg appearance is seen in which nevus

A

Dysplastic nevus
Flat nevus with raised centre

30
Q

Differential diagnosis

A

Malignant melanoma

31
Q

Therapy of dysplastic nevus

A

Excision

32
Q

Spitz nevus

A

Spindle and epithelioid cell nevus

33
Q

Spitz nevus clinical features

A

Red brown papule or nodule
On Face or trunk
Sudden growth of nevus

34
Q

Differential diagnosis of spitz nevus

A

Mast cell tumor
Juvenile xanthogranuloma

35
Q

Therapy

A

Excision

36
Q

Pigmented spindle cell nevus

A

Reed nevus

37
Q

Clinical features of reed nevus

A

Dark flat or slightly raised papule

38
Q

Diagnosis of reed nevus

A

Starburst pattern on dermatoscopy

39
Q

Blue nevus

A

Dermal proliferation of spindle shaped melanocytes

40
Q

Blue nevus clinical features

A

Blue grey to black papule

Dermatology (31 decks)

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