Pressure ulcer cases are complex in that the entire patient must be taken into account including preexisting conditions, nutrition, clinical status, compliance with prescribed medical treatment and overall physical condition. When pressure ulcers develop some facilities take photos as part of the documentation of the wounds. Pictures of these wounds can be powerful demonstrative evidence. For those cases where no wound pictures exist, the National Pressure Ulcer Advisory Panel, an authoritative source on pressure ulcers in the U.S., offers a large selection of pressure ulcer photos. Cost is $25.00 for professional use. These pictures can be particularly compelling demonstrative evidence.