[Skin necrosis: report of eleven cases].

Skin necrosis must be considered as a syndrome, because it is a clinical manifestation of different diseases. An early diagnosis is very important to choose the appropriate treatment. Therefore, its causes should be suspected and confirmed quickly.

Scleromyxedema without paraproteinemia.

Background: Scleromyxedema is a rare generalized form of lichen myxedematosus, a chronic cutaneous mucinosis of unknown etiology usually associated with a monoclonal gammopathy and underlying systemic disorders. It is characterized by the presence of lichenoid papules and diffuse indurations of the skin. Histologically, mucin deposits are observed in the dermis as variable degrees of fibrosis.

[Necrotizing herpes folliculitis. Report of one case].

Herpes folliculitis is a rare manifestation of herpes virus infection. It usually represents a diagnostic challenge, due to the absence of characteristic skin manifestations such as vesicles or pustules. The reported cases are mainly associated with varicella zoster virus (VZV) and less commonly with herpes simplex viruses (HSV-1 y HSV-2).

[Nephrogenic fibrosing dermopathy. Report of two cases].

Nephrogenic fibrosing dermopathy is a recent designation to describe cutaneous findings in patients with renal disease who developed scleromyxedema-like skin lesions with thickening and hardening of the skin. These skin lesions appear mainly after hemodialysis or renal transplantation but their origin is still unknown. We report a 63 years old male on hemodialysis and 56 years old male on peritoneal dialysis, who developed a nephrogenic fibrosing dermopathy that was confirmed by pathology and immunohistochemistry with monoclonal antibodies against CD34).