title: Deep leg ulceration. Look to underlying systemic disease for the cause of this dermatologic condition.
authors.affiliation: University of Arizona Health Sciences Center, Tucson, USA.
authors.forename: Norman
authors.initials: N
authors.lastname: Levine
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000150:complications / Q000175:diagnosis; D003093:Colitis, Ulcerative / Q000150:complications / Q000175:diagnosis; D003452:Cryosurgery / Q000009:adverse effects; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007871:Leg Ulcer / Q000209:etiology*; D008875:Middle Aged; D009584:Nitrogen / Q000009:adverse effects; D017511:Pyoderma Gangrenosum / Q000150:complications* / Q000175:diagnosis*; D012878:Skin Neoplasms / Q000150:complications / Q000175:diagnosis; D001098:Spider Bites / Q000150:complications / Q000175:diagnosis
chemical_list: D009584:Nitrogen