http://cal.vet.upenn.edu/projects/dermpath/index.htm

he aim of this website is:To review the gross pathology of skin lesions, either primary lesions (those directly caused by the disease process) or secondary lesions (those that occur due to underlying diseases, trauma or medications).To predict the likely histopathology from the gross appearance of the lesions and to correlate the gross and histopathology using case material.