Segmental neurofibromatosis (NF5) is a rare variant of neurofibromatosis. To our knowledge, there have been few reports of cases presenting later in life. The recognition of NF5 is important, as there have been reports of paraneoplastic manifestations and transmission to offspring. Here we present the case of a patient who presented with NF5 first appearing in her mid-50s. This case illustrates...

After launching of sildenafil citrate, the last invention of 20 century, in 1998, oral phosphodiesterase type 5 (PDE5) inhibitor has been established as first line treatment of erectile dysfunction and shift new paradigm of diagnosis and treatment of erectile dysfunction. The big success of sildenafil in pharmaceutical R&D induced the consecutive development of the so-called ‘The second Viagra’...

The cyclic nucleotide signalling pathway mediates the smooth-muscle relaxing effects of nitric oxide necessary for normal erectile function. Down-regulation of this pathway is central to the pathophysiology of many forms of erectile dysfunction (ED), which is often associated with other chronic diseases (e.g. hypertension, type 2 diabetes mellitus) and treatments (e.g. certain drugs, radical pr...