[Muscle infarction. An unknown complication of diabetes mellitus]. / L'infarctus musculaire. Une complication méconnue du diabète.

INTRODUCTION: Diabetic muscle infarction (MI) is a rare and little-known complication of diabetes mellitus. CASE REPORT: We report a case of relapsing MI in which magnetic resonance imaging (MRI) suggested the diagnosis. A 53-year-old man with multi-complicated type II diabetes mellitus was admitted to our unit for illness and deep tumefaction of the right thigh. Because of unconclusive MRI, a muscular biopsy of the lesion was performed and MI confirmed. Three months after, a left relapse of MI occurred. Immediate treatment with immobilization and heparinotherapy permitted a rapid recovery. CONCLUSION: About 70 previously reported cases are reviewed. The mean age at presentation was about 40 years. MI was usually seen in patients with long-standing diabetes with multiple end organ microvascular complications. Homo- or heterolateral recurrences are reported in almost half of the patients. MRI is the best imaging technique for suggesting the diagnosis.

[Specific renal lesions revealing the presence of sarcoidosis (author's transl)]. / L'atteinte rénale spécifique révélatrice de la sarcoïdose.

Three cases of granulomatous nephropathy are reported. In two patients this was definitely related to a true renal sarcoidosis, while the third case raised the problem of the significance of an "isolated sarcoidosis nodule". The authors discuss the frequency, clinical symptoms, and pathological appearances of these renal lesions which reveal the presence of sarcoidosis, as well as the relationship between renal insufficiency and the parenchymatous lesions observed, and therapy.