ABSTRACT
Nodular and diffuse dermatitis represents a group of diverse inflammatory conditions, each of which presents with inflammatory cells present in nodules filling portions of the dermis or diffusely filling the entire dermis. As with all inflammatory patterns, there is significant overlap between nodular dermatitis and diffuse dermatitis-many of the same diseases may present with either pattern. Similarly, cutaneous inflammatory conditions which are most often superficial or superficial and deep perivascular infiltrates may at times present with a nodular or diffuse pattern.
