Original MICA image-reading exercise, unscored. No clinical narrative absent from the source is added.
- Describe visible findings before proposing an interpretation.
- Suggest an interpretation and at least one image limitation.
- Which clinical findings or investigations would complement this observation?
Reveal the explained reading
Purpura
- Mechanism
- Blood extravasation
- Blanching test
- No blanching
- Elevation
- Flat or palpable
- Direction
- Platelets, coagulation, vessels
Morphological description
Describe size, dependent or widespread distribution, elevation, blistering and necrosis; distinguish petechiae from bruises.
Causes and diagnostic direction
Possible causes include thrombocytopenia, platelet dysfunction, coagulation disorders or vascular fragility; palpable lesions suggest vasculitis.
Differential diagnoses
Erythema usually blanches; cutaneous vasculitis must be distinguished from bleeding caused by haemostatic abnormalities.
Pitfalls and limitations
Purpuric appearance does not establish vasculitis; biopsy of a suitable lesion may be needed.
Take-home message
Describe the bleeding, check platelets and investigate vascular or systemic involvement according to context.
Sources
Documentary review: 2026-10-12
Media source & rights
- Author
- Abdullah Al-Hargan; Yasser A. Ghobara; Ahmad Al-Issa
- Original source
- Abdullah Al-Hargan; Yasser A. Ghobara; Ahmad Al-Issa · Purpura après épilation laser documenté · https://link.springer.com/article/10.1186/s13256-018-1604-4 · CC BY 4.0
- Licence
- CC BY 4.0
- Changes
- Proportional resize and WebP conversion only; metadata removed; full source figure preserved.
- Dimensions
- 358 × 476 px
- Check
- 2026-10-11