Kobners Phenomenon

Question 1

True kobners
Pseudo kobners
Rare causes

Answer 1

True- psoriasis, Lichen planus , vitiligo
Pseudo - Viral warts and molluscum
Rare- darrier disease and lichen nichetidus

Question 2

Chediak hegashi syndrome

Answer 2

Oculocutaneous albinism + Recurrent infection + giant granuels with neutrophils on ps

Question 3

Whickhams striae, thinning of nail plate, pterygium of nails

Answer 3

Lichen planus

Question 4

Herthoges sign

Answer 4

Seen in atopic dermatitis
(Meaning -Lateral madarosis )

Question 5

Wiskott aldrich syndrome

Answer 5

Recurrent infections + atopic eczema + thrombocytopenia

Question 6

Annular eczema seen in

Answer 6

Pitryaisis rosacea
Leprosy bb
Tinea corporis

Question 7

Cicatrical alopecia (5)

Answer 7

Lichen planus , sarcoidosis, dle ,discoid of sle ,tinea capitis

Question 8

Apple jelly nodules on diascopy

Answer 8

{lupus vulgaris} cutaneous tb /sarcoidosis/ cutaneous leishmaniasis

Question 9

Welsch regimen for actinomyecetoma

Answer 9

Amikacin +cotrimoxazole

Question 10

Anogenital warts hpe

Answer 10

Koilocyte ( central hyperchromatic nucleus with perinuclear halo )

Question 11

Diday kassowitz law

Answer 11

In untreated syphlitic mother series of pregnqncies improves likelihood of infection of fetus
ABORTION>STLL BIRTH>NEONATAL DEATH >LIVING CHILD (UNHEALTHY) >LIVING CHILD ( HEALTHY )

Question 12

Groove sign of greenblatt

Answer 12

Seen in lymphogranuloma venereum

Question 13

En coup de sabre

Answer 13

Seen in scleroderma involving only skin ie morphea

It is sword like alopecia

Question 14

Papillary tip microabscess seen in

Answer 14

Dermatitis herpetiform

Question 15

Eosinophilic microabscess

Answer 15

Pemphigus vegetans

Question 16

Pseudo nikolsky sign

Answer 16

Seen in Toxic epidermal necrolysis

Question 17

Acneiform eruption

Answer 17

Acne Seen due to drugs like systemic steroids and att (isoniazid)

Question 18

Molluscusm contagiosum tt

Answer 18

Imiquimod and trichloroacetic acid

Question 19

Downeys lymphocyte on ps seen in

Answer 19

Epstein barr virus

Question 20

Higoumenakis sign

Answer 20

Unilateral sternal end of clavicle shows periostitis

Seen in late congenital syphilis

Question 21

Buschke ollendorf sign

Answer 21

When syphilitic patients skin lesions are pressed With blunt end of pin deep dermal tenderness is seen

Reason- pin causes blood vessels narowing resulting in ischemia

Question 22

Donovan bodies seen in donovanosis hpe

Answer 22

Closed safety pin appearance due to bipolar condensation of chromatin

Question 23

Darrier sign is seen in

Answer 23

Cutaneous mastocytosis aka urticaria pigmentosa

Question 24

Pseudo darier sign seen in

Answer 24

Congenital Smooth muscle hamartoma

Question 25

Buttonhole sign seen in

Answer 25

Neurofibromas

Question 26

Lesser trelat sign seen in

Answer 26

Gi adenocarcinoma (Development of rapid ,multiple,sudden eruption of seborrhoeic keratosis )

Question 27

Migratory thrombophlebitis is seen in which ca

Answer 27

Ca pancreas

Question 28

Necrolytic migratory erythema is seen in

Answer 28

Alpha cells of pancreas tumor

Question 29

Erythema gyratum repens seen in

Answer 29

Ca lung Wood grain pattern

Question 30

Cat tongue sign /carpet tack sign

Answer 30

Seen in discoid LE

Question 31

Claw clutching on hpe

Answer 31

Lichen nitidus

Question 32

Pathway activated in basal cell carcinoma

Answer 32

Sonic hedgehog pathway

Question 33

Surgery for basal cell ca

Answer 33

Moh’s micrographic surgery

Question 34

Targeted therapy for bcc

Answer 34

Vismodegib and sonidegib which are inhibitors of hedgehog pathway

Question 35

Pautrier microabscess seen in

Answer 35

Fungal mycoidesis