Nevus

Question 1

Types of nevus

Answer 1

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

Question 2

Congenital melanocytic nevus

Answer 2

Large lesion
Bathing trunk nevus
Giant hairy nevus

Question 3

Bathing trunk nevus

Answer 3

Involves entire body segment

Question 4

Feature of congenital melanocytic nevi that is different from acquired is

Answer 4

Hair presence and
Pigmentation

Question 5

Prognosis of congenital melanocytic nevi

Answer 5

Risk of malignant melanoma

Question 6

Therapy goals

Answer 6

Avoid malignant melanoma
Cosmetic improvement

Question 7

Therapy

Answer 7

Excision of small and medium nevi

Excision of large is not possible

Question 8

Neurocutaneous melanosis

Answer 8

Leptomeningeal involvement

Leptomeningeal malignant melanoma

Question 9

Diagnosis of neurocutaneous melanosis

Answer 9

Physical examination
With ophthalmology and
Neurology

Question 10

Nevus spilus

Answer 10

Speckled lentiginous nevus

Question 11

Is nevus spilus congenital

Answer 11

Yes

Question 12

Clinical features of nevus spilus

Answer 12

Lentigens, macule, papule

Systemic findings maybe present like
Nevus spilus syndrome
Hyperhydrosis
Pharmacomatosis pigmentokeratosis

Question 13

Nevus spilus differential diagnosis

Answer 13

Becker nevus

Question 14

Therapy

Answer 14

Excision
Malignant melanoma risk is low

Question 15

Acquired melanocytic nevus

Answer 15

Benign proliferation of melanocytes
Most common

Question 16

Acquired nevus pathogenesis

Answer 16

Sun exposure
Hormones (puberty and pregnancy)
Immunosupression

Question 17

Clinical features of acquired nevus

Answer 17

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

Question 18

Differential diagnosis

Answer 18

Non pigmented nevi may be mistaken for skin tags or neurofibromas

Question 19

Prognosis of acquired nevus

Answer 19

Greater than 50 nevus increased risk of melanoma

Question 20

Therapy

Answer 20

Excision

Question 21

Halo nevus

Answer 21

Sutton nevus

Melanocytic nevus surrounded by hypopigmentation

Question 22

Pathogenesis of halo nevus

Answer 22

Lymphocytic response attacks nevus and makes nevus disappear
Sunburn

Question 23

Halo nevus clinical features

Answer 23

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

Question 24

Therapy

Answer 24

Excision

Question 25

Dysplastic nevus

Answer 25

Atypical nevus Irregular border Large size

Question 26

Epidemiology of dysplastic nevus

Answer 26

Maybe genetic

Question 27

Pathogenesis of dysplastic nevus

Answer 27

Hormones and sun exposure

Question 28

Clinical features of dysplastic nevus

Answer 28

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

Question 29

Fried egg appearance is seen in which nevus

Answer 29

Dysplastic nevus Flat nevus with raised centre

Question 30

Differential diagnosis

Answer 30

Malignant melanoma

Question 31

Therapy of dysplastic nevus

Answer 31

Excision

Question 32

Spitz nevus

Answer 32

Spindle and epithelioid cell nevus

Question 33

Spitz nevus clinical features

Answer 33

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

Question 34

Differential diagnosis of spitz nevus

Answer 34

Mast cell tumor Juvenile xanthogranuloma

Question 35

Therapy

Answer 35

Excision

Question 36

Pigmented spindle cell nevus

Answer 36

Reed nevus

Question 37

Clinical features of reed nevus

Answer 37

Dark flat or slightly raised papule

Question 38

Diagnosis of reed nevus

Answer 38

Starburst pattern on dermatoscopy

Question 39

Blue nevus

Answer 39

Dermal proliferation of spindle shaped melanocytes

Question 40

Blue nevus clinical features

Answer 40

Blue grey to black papule