抄録
A 22-year-old male with mental defficiency underwent ear surgery (tympanoplasty) four times, but postoperative infection with severe otorrhea occurred every time. After the fourth surgery we found out perineal Eczema marginatum. It is highly suspected that the patient scratched his perineum because of itch and contaminated the surgical wound unconsciously with his dirty hand. The fifth operation was carried out with severe postoperative control of sterility and the infection was no more observed. The difficulty of management of mentally defficient patient and the irresponsible dependence on antibiotics were discussed.
We found five crystals in the granulations at middle ear cavity. Investigating them by IR absorption spectroscopy, etc, we could know that chief element of them was CaCO3.
