<unk> s are a cutaneous condition characterized by aggregations of ill-defined, abnormal, microscopic<unk>  channels.
Microcystic lymphatic malformation
Congenital dermal sinus
Vascular ring
Acquired progressive lymphangioma
Persistent tunica vasculosa lentis
Hyperkeratotic cutaneous capillary-venous malformation
Developmental venous anomaly
Keratin implantation cyst