Malformation involving primarily lymphatic vessels. Clinically, it appears as numerous small vesicle-like lesions grouped in a plaque.
Lacunar pattern composed of :
- Clear to tan lacunae surrounded by pale septa if there is no inclusion of blood in the lacunae
- Yellow to pink lacunae alternating with dark red or bluish lacunae, if there is inclusion of blood in the lacunae
- Hypopyon-like feature (half and half blIster): a sign observed when the blood inside the lacunae accumulates in the lowest part of the lacunae due to sedimentation, resembling the appearance of the hypopion in the eye