ICD-11 classes
14 Diseases of the skin
Skin disorders involving specific cutaneous structures
Disorders of cutaneous blood and lymphatic vessels
EF40 — Vasculitis or capillaritis involving the skin
EF40.0 — Capillaritis

ICD-11 EF40.0 — Capillaritis

Capillaritis results from extravasation of red blood cells from leaky capillaries into the dermis and manifests initially as a finely stippled pink to purple purpura, most commonly affecting the lower limbs. As iron is released and converted into haemosiderin, the skin stains gold or brown. Various patterns of capillaritis have been described and given separate names depending on the distribution, time course, extent and degree of pigmentation and presence or otherwise of epidermal thickening. The underlying processes involved in all these variants is very similar and of unknown cause. Histology may show mild inflammation around capillaries but no vasculitis.

It has no clarifying diagnoses.