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Having, or arranged in, three zones or layers.
References in periodicals archive ?
(3,17) The trizonal histologic pattern of RN has been confirmed in many studies (2-4,6,17) (Figures 1 and 2).
(31) Irrespective of nomenclature, these lesions are histopathologically characterized by a trizonal pattern consisting of (1) atypical junctional proliferation of melanocytes with pagetoid spread above the basal layer; (2) prominent dermal fibrous scarlike tissue containing large, irregular, and confluent melanocytic nests; and (3) residual nevus cells adjacent to or below the scar.
La gran vision del modelo trizonal de Venezuela ofrece las pistas para una segunda lectura del territorio, la del territorio posible.