****Asboe-Hansen sign (Blister spread sign)
Enlargement of bulla by applying finger pressure to small, intact, and tense bulla in patients with pemphigus and
In the traditional bulla spread sign, pressure is applied to the blister from one side, whereas in eliciting Asboe-Hansen sign pressure is applied at the center of the blister and perpendicular to the surface due to smaller size of the lesion.
It is seen in keratosis pilaris in which individual follicles show a long strand of keratin glinting when examined in tangentially incident light.
where there is pinpoint bleeding on removal of scales from the lesions of psoriasis. The test by which Auspitz sign is elicited is called as Grattage test. Other dermatoses where Auspitz sign can be positive is Darier’s disease and actinic keratosis.
*****Branham’s sign (Nicoladoni sign)
It is to be elicited in cases of arterio-venous fistula where there is slowing of the heart rate in response to (manual) compression.
This is a sign to be elicited in case of secondary syphilis and cutaneous vasculitis,where there is deep dermal tenderness on pressing the lesion (e.g., papular lesions of syphilis) with a pinhead.
*****Carpet tack sign (Tin tack sign, Cat tongue sign)
When the adherent scale is removed from the lesions of discoid lupus erythematosus, the undersurface of the scale shows horny plugs that have occupied patulous hair follicles. This sign is also seen in seborrheic dermatitis.
Axillary freckling seen in type I neurofibromatosis is known as Crowe’s sign.
Periumbilical ecchymosis in cases of acute hemorrhagic pancreatitis and ruptured ectopic pregnancy is termed Cullen’s sign. Similar changes in the flank is called as Grey-Turner sign.
Rubbing a lesion of mastocytoma causes urtication, flare, swelling and sometimes blister formation due to release of histamine. In contrast, pseudo-Darer’s sign is seen in smooth muscle hamartoma where there is increase in induration and piloerection after firm stroking. Other conditions where one could find positive Darier’s sign are leukemia cutis, juvenile xanthogranuloma, and Langerhans cell histiocytosis.
*****Dimple sign (Fitzpatrick sign)
Squeezing the skin adjacent to a dermatofibroma causes a dimpled appearance on its surface, also termed a positive “pinch sign” or “dimple sign,”
The presence of sharply demarcated alternating bands of normally pigmented and hypopigmented zone of hair indicating episodes of normal nutrition and intermittent malnutrition respectively, seen in kwashiorkor- or marasmus-type malnutrition.
Seen in 20% of rubella patients, where there is an enanthem of dull-red macules or petechiae confined to the soft palate during the prodromal period or on the first day of the rash.
It is a characteristic finding in dermatomyositis typified by scaly erythematous eruption seen on the dorsa of hands, metacarpophalangeal joints, and proximal interphalangeal joints.
Characterized by sudden eruption of numerous seborrhoeic keratosis, usually associated with pruritus and is considered as a marker of internal malignancy.
More of these coming soon ………………………… 🙂