According to our data ESWT does not appear to be significantly effective for decreasing penile curvature and plaque size or improving sexual function in the total population of patients with Peyronie's disease despite improvements in individuals. Penile pain seems to resolve earlier than during the natural course. Regarding the results of this study and previous reports with exact documentation of the clinical findings it can be concluded that ESWT cannot be recommended as a standard procedure for Peyronie's disease. To evaluate the exact efficacy of ESWT a controlled, single-blind, multicenter study with exact documentation of symptoms is urgently required.

The results of this study do not indicate any significant association between Peyronie's disease and antigens of the HLA system.

Experimental data from other investigators have shown that TGF-beta1 has an important role in the etiopathology of Peyronie's disease. Our results indicate that the homozygous wild type of the G915C single nucleotide polymorphism in the coding region of the TGF-beta1 gene, which was recently associated with elevated TGF-beta1 production and pulmonary fibrosis, may influence the predisposition to Peyronie's disease. However, it does not represent a major genetic risk factor.

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The results of this study do not indicate an association between Peyronie's disease and bacterial infection.

Hormone replacement therapy with testosterone has become well-established over the course of time. The initial substantial concerns with respect to complications and potential adverse events, particularly in older patients, were proven to be unfounded over time. Testosterone therapy has therefore gradually become a regular treatment modality in urological practice. It has also been shown to represent a valuable tool as supportive treatment for patients with erectile dysfunction and hypogonadism. A variety of testosterone preparations are available for treatment. Recent pharmaceutical developments have greatly improved the practicability and ease of administration for patients. Several guidelines have been developed that provide clearly formulated standards and instructions for indications, contraindications, application, risk factors and monitoring of testosterone therapy. Adverse events affecting the cardiovascular system and especially diseases of the prostate gland are of great importance, thus making the urologist the primary partner in the treatment of patients with testosterone deficiency.

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