Rash Exam

Question 1

List the factors states when describing a rash

Answer 1

• Location
• Distribution
• Size
• Configuration- discrete or confluent (merges)
• Border
• colour
• morphology

Question 2

Describe different types of Distribution

Answer 2

Discrete lesions: individual lesions, clearly separated from one another (e.g. normal mole).

Confluent lesions: lesions that appear to be merging together (e.g. urticaria).

Linear lesions: lesions in the shape of a line (e.g. excoriations).

Discoid lesions: coin-shaped lesions (e.g. discoid eczema, discoid lupus).

Target lesions: concentric rings of varying colour, resembling a bullseye (e.g. erythema multiforme).

Question 3

List the different morphology of lesions

Answer 3

Primary skin lesions are those which develop as a direct result of a disease process.

Macule: a flat area of altered colour less than 1.5cm in diameter.

Patch: a flat area of altered colour greater than 1.5cm in diameter.

Papule: a solid raised palpable lesion less than 0.5cm in diameter.

Nodule: a solid raised palpable lesion greater than 0.5cm in diameter.

Plaque: a palpable flat lesion usually greater than 1cm in diameter. Most plaques are raised, however, some may be thickened without being visibly raised.

Vesicle: a raised, clear fluid-filled lesion less than 0.5cm in diameter.

Bulla: a raised, clear fluid-filled lesion greater than 0.5cm in diameter.

Pustule: a pus-containing lesion less than 0.5cm in diameter.

Abscess: a localised accumulation of pus.

Wheal: an oedematous papule or plaque caused by dermal oedema.

Boil/furuncle: staphylococcal infection around or within a hair follicle.

Carbuncle: staphylococcal infection of adjacent hair follicles (i.e. multiple boils/furuncles).

Question 4

Morpholgies

Answer 4

Look at the different images of morphologies!

https://geekymedics.com/examining-a-skin-lesion-osce-guide/