Specia Clinical And Lab Aids

Question 1

Done in a darkened room
Often required to detect slight degrees of elevation or depression

Visualization of surface configuration of lesions and extent of eruptions

Answer 1

Oblique lighting

Question 2

This special technique enhances the contrast between circumscribed hypopigmented or hyperpigmented lesions and normal skin

Answer 2

Subdued lighting

Question 3

Valuable for diagnosis of certain skin and hair diseases and porphyria

Fluorescent pigments and subtle color differences of melanin pigmentation can be seen

Dermatophytoses, Erythrasma

Answer 3

Wood lamp

Question 4

Firmly pressing a microscopic slide over a skin lesion whether it blanches to due capillary dilatation or not due to extravasation of blood

Answer 4

Diascopy

Question 5

A hand lens permits the noninvasive inspection of deeper layers of epidermis and beyond

Useful in distinction between benign and malignant growth patterns

Answer 5

Dermoscopy

Question 6

[Clinical Signs]

Positive when a brown macular or slightly papular lesion of urticarial pigmentosa becomes palpable after vigorous rubbing with a blunt instrument

Answer 6

Darier sign

Question 7

[Clinical Signs]

Positive when slight scratching of a scaly lesion reveals punctate bleeding points

Answer 7

Auspitz sign

Question 8

[Clinical Signs]

Positive when epidermis is dislodged from dermis by lateral, shearing pressure with a finger that results to an erosion

Answer 8

Nikolsky phenomenon

Question 9

Nikolsky phenomenon is a diagnostic sign of:

Answer 9

Acantholytic disorders

• pemphigus
• SSSS

Other blistering disorders such as TEN

Question 10

Tzanck smear is used for which diseases

Answer 10

Herpes simplex
Herpes zoster
Varicella
-presence of giant cells

Pemphigus or SSS- presence of acantholytic cells

Question 11

When doing biopsy in herpes simplex or pemphigus, lesions should be no more than ___ old

Answer 11

1 day