A case of infliximab-induced psoriasis.

Anti-tumor necrosis factor (anti-TNF-alpha) are a group of new drugs able to inhibit the action of this cytokine. Although systemic side effects have been well described, cutaneous adverse reactions have not yet been clearly elucidated. The authors report a case of a 29-year-old man affected by Crohn disease and ankylosing spondylitis who developed psoriatic lesions after IV infusion of infliximab 5 mg/Kg. The patient underwent cyclosporine treatment after interruption of biological therapy, and had complete resolution of cutaneous lesions. The reason for this phenomenon is not clear, Obviously more studies are necessary to define more clearly this paradoxical reaction. In addition, dermatologists must be informed about this potential cutaneous adverse event.

[Pyoderma gangrenosum: case series]. / Pioderma gangrenoso: presentazione di alcuni casi clinici.

Pyoderma Gangrenosum (PG) is a rare ulcerative cutaneous condition with distinctive characteristics, and the aetiology is not clear yet. PG is commonly associated with inflammatory bowel disease (Ulcerative Colitis and Crohn's disease). The features of PG are not specific histopathologically and for this reason diagnosis is based on clinical feature. There is no single successful treatment for PG. In fact certain type of lesions respond more readily to some therapies than others. Local treatments (advanced wound care, local corticosteroids, local immunomodulator agents) may be sufficient for some clinical features, while others may be required systemic therapy (corticosteroids, immunosuppressive therapy, intravenous immune globulins, TNF-alpha blocking agents). We present four cases of PG associated with inflammatory bowel diseases treated with different therapeutic approaches.

PEL, Kaposi's sarcoma HHV8+ and idiopathic T-lymphocitopenia CD4+.

We described a case report of a 36-year-old woman with a 10-year-history of idiopathic CD4+ T-lymphocitopenia and Kaposi's sarcoma HHV8+ who developed recurrent pleural effusion. Laboratory and instrumental tests with morphologic, immunophenotypic and molecular analysis of pleural sediment suggest us the diagnosis of primary effusion lymphoma (PEL). The term primary effusion lymphoma defines an extranodal non-Hodgkin's lymphoma HHV8-related, usually classified as a B-cell lymphoma, that grows in liquid-phase within body cavities. The case reported by the Authors appears to be of great interest for its epidemiological and clinical features.

Inositol and acne.

Acne, once considered as a mere esthetic problem, is now recognized as a disease that can cause major disturbances of the psychological and emotional sphere. Currently, the treatment of acne is focused on one or more pathogenic factors: hormonal stimulation and sebaceous hypersecretion, disorder of keratinization, colonization of Propionibacterium acnes and inflammation. The aim of the paper was to evaluate the use of inositol in patients with moderate acne.

Lisch nodules of the iris in neurofibromatosis type 1.

Neurofibromatosis type 1 (NF1) is a common autosomal dominant disease. The Lisch nodule represents one of the most common NF1 ocular manifestations. Several studies have reported that the Lisch nodule is a melanocytic hamartoma but its pathogenesis is still debated. We have studied the histopathological and ultrastructural features of a Lisch nodule of a 50-year-old woman biopsied during an intracapsular cataract extraction. Our researches revealed that it was composed of three main cytotypes: pigmented cells, fibroblast-like cells and mast cells, showing a pattern similar to a neurofibroma. Furthermore, we hypothesize that Lisch nodules are compatible with neurofibromas.