棘下筋に発症した化膿性筋炎と思われた1例

抄録

Although cellulitis is a well known disease concerned well, it may suffer from the misdiagnosis with infection or necrotizing fasciitis. We reported on a case of considered to be pyomyosis whose symptoms were shown only in infraspinatus. A 58-years old man who complained of right shoulder pain and limited of ROM. His clinical history showed that he had hit his right shoulder on a kitchen shelf at his house, and recieved an abrasion on the outside of his right shoulder. The next day, he had right shoulder pain and limited ROM. However, NSAIDs was not effective. One week later, the right shoulder was not swollen and a feeling of heat found at the time of the first medical examination was not present. Blood biochemistry and picture inspection were carried out. MRI showed the presence of edema of only infraspinatus. We diagnosed this case as pyomyosis. The treatment carried out using an antibiotic and NSAIDs medication. A feature of this case was that MRI showed the state of edema of only the infraspinatus and the other muscles were considered of the usual intensity, and the shoulder was not swollen and did not feel hot.