[Erythema nodosum due to cat-scratch-disease: An association and important therapeutic implications]. / Érythème noueux compliquant une maladie des griffes du chat : une association et des implications thérapeutiques à connaître.

INTRODUCTION: Cat-scratch disease is a zoonosis caused by Bartonella henselae and transmitted mostly through a break in the skin. This infectious disease is commonly characterized by a benign lymphadenitis. However, more unusual presentations have been observed. CASE REPORT: We report the case of a 44-year-old woman with cat-scratch disease who developed subsequently an erythema nodosum. The non-steroidal anti-inflammatory treatment of the erythema nodosum may have led to worsening of cat-scratch disease with an abscess requiring surgical treatment. CONCLUSION: Cat-scratch disease is an uncommon and poorly known cause of erythema nodosum, and must be systematically ruled out. As non-steroidal anti-inflammatory drug are usually prescribed as a treatment of erythema nodosum, it should be used cautiously to reduce the risk of complications in the cat-scratch disease.

[A case of gonococcal arthritis: Diagnostic difficulties and usefulness of synovial fluid PCR]. / Monoarthrite septique à gonocoque : difficultés diagnostiques et intérêt de la PCR dans le liquide articulaire.

INTRODUCTION: The incidence of Neisseria gonorrhoeae septic arthritis remains low in the general population. Its clinical and microbiological diagnostic remains difficult. CASE REPORT: We report a 44-year-old man who presented with a monoarthritis of the right ankle. The diagnosis of gonoccocal septic arthritis was obtained by PCR from the joint fluid. Treatment with ceftriaxone was effective. CONCLUSION: In patients with high risk of N. gonorrhoeae infection, PCR for detection of gonorrhea in synovial fluid could potentially facilitate the diagnostic of gonococcal septic arthritis.