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The hypoactive corpora cavernosa with degenerative erectile dysfunction: a new syndrome
Ahmed Shafik1, Ismail Ahmed, Olfat El Sibai
1Department of Surgery and Experimental Research, Faculty of Medicine, Cairo University, Cairo, Egypt. shafik@ahmedshafik.com
BMC Urology
|May 26, 2006
Summary
Erectile dysfunction may stem from diminished corpus cavernosum electromyography activity, a condition termed "hypoactive corpus cavernosum." This dysfunction involves degenerative changes and does not respond to standard treatments, necessitating further research into its causes.
Area of Science:
- Urology
- Physiology
- Pathology
Background:
- Investigated 22 patients with unexplained erectile dysfunction (ED) exhibiting diminished corpus cavernosum electromyography activity.
- Previous investigations (vasculogenic, neurogenic, endocrinologic, psychogenic) failed to identify the cause of ED in these patients.
Purpose of the Study:
- To test the hypothesis that reduced corpus cavernosum electromyography activity causes ED.
- To characterize the physiological and pathological changes associated with this condition.
Main Methods:
- Recorded electro-cavernosograms in 22 ED patients and 15 controls during flaccid, erectile, and detumescent phases.
- Administered sildenafil and intracavernosal papaverine; performed penile implants and biopsy examinations.
Main Results:
- ED patients showed significantly decreased and irregular slow wave activity in the corpus cavernosum compared to controls.
- No erection response to sildenafil or papaverine; biopsies revealed muscle fiber degeneration, fragmented collagen/elastic fibers, and fibrosis.
- Penile implants were the sole effective treatment.
Conclusions:
- Introduced 'hypoactive corpus cavernosum' as a novel cause of ED.
- Corpora cavernosa exhibit degenerative changes and diminished electromyography activity.
- The etiology of these degenerative changes requires further investigation.
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