[Exogenous zinc deficiency syndrome].

The document reported two cases of acquired zinc deficiency following excessive bowel resection and total pancreatectomy, as well as total parenteral nutrition. Patients exhibited skin lesions, including diffuse hair loss and psoriasis-like dermatitis, primarily in acral areas and around body orifices. These symptoms resolved quickly with oral zinc sulfate supplementation. The document also discussed clinical symptoms, etiological factors, differential diagnosis, and therapy related to zinc deficiency.