2021 Volume 37 Issue 2 Pages 160-165
Pyomyositis occurs mostly in the trunk and lower extremities, and there are few reports of it occurring in the upper extremity in the absence of predisposing factors such as trauma or immunocompromised conditions. We report a case of a previously healthy three-year-old girl who developed left triceps muscle pyomyositis. She presented with left upper limb immobility due to pain and fever. Laboratory data showed an elevated white blood cell count and C-reactive protein level. MRI revealed no abnormal findings in the bone marrow; however, there were inflammatory findings in the triceps muscle and the surrounding fatty tissue. Although the blood cultures were negative, she improved after treatment with intravenous antibiotics and was discharged without any sequelae. If the diagnosis is delayed and the disease progresses to abscess formation, it may require surgical treatment and even leave sequelae. We believe that this condition should also be considered as a differential diagnosis in patients with fever accompanied by local limb pain. Early diagnosis using MRI at an appropriate time is essential for preventing invasive procedures.
