Skeletal recovery from hepatitis C-associated osteosclerosis (HCAO) following antiviral treatment.

Hepatitis C-associated osteosclerosis (HCAO) is characterized by increased bone mass following hepatitis C infection. We report here a case of HCAO that lasted 8 years before the patient received antiviral hepatitis treatment. Seven years after the antiviral treatment, the evolution of radiographs and densitometry showed skeletal recovery of osteosclerosis. This case strengthens the relationship between viral infection and osteosclerosis.

Severe atherosclerosis in rheumatoid arthritis and hyperhomocysteinemia: is there a link?

Rheumatoid arthritis (RA) is a chronic inflammatory joint disease whose main complication is accelerated atheroma responsible for high rates of cardiovascular morbidity and mortality. Hyperhomocysteinemia is among the factors incriminated in RA-associated atheroma. We managed a 46-year-old patient with RA who required admission to evaluate severe arterial and venous disease with involvement of the coronary, renal, and peripheral arteries. She had no laboratory evidence of rheumatoid vasculitis or conventional cardiovascular risk factors (diabetes and hypercholesterolemia) and had never smoked. Her serum homocysteine level was elevated to 20.9 micromol/L as a result of a homozygous C667T mutation in the methylenetetrahydrofolate (MTHFR) gene. Folate and vitamin B12 levels were normal. A circulating anticoagulant was identified. Hyperhomocysteinemia, which is defined as a homocysteine level greater than 15 micromol/L, is a risk factor for arterial and venous disease. Hyperhomocysteinemia is found in 20%-42% of patients with RA. Methotrexate therapy is the most common causative factor. Other causes include MTHFR deficiency, vitamin B12 deficiency, renal failure, old age, and smoking. Whatever the underlying cause, folic acid supplementation returns the homocysteine level to normal.

Multiple vertebral osteonecrosis.

Vertebral osteonecrosis classically presents with an intravertebral vacuum cleft phenomenon or a fluid-filled cleft on MR images. These clefts are usually found in older patients presenting with more severe fractures, more significant collapse and instability. Therefore, although considered for a long time as pathognomonic for vertebral osteonecrosis, vertebral clefts are now considered to represent fracture non-union. The double-line sign is classically described for osteonecrosis of long bones, but has been reported in one case of concurrent spinal cord and vertebral bone marrow radionecrosis. We present a case of a histologically confirmed multilevel vertebral osteonecrosis manifesting as a double-line sign in the absence of an associated vertebral collapse and unrelated to radiotherapy.

Safety of infliximab used in combination with leflunomide or azathioprine in daily clinical practice.

OBJECTIVE: To investigate the safety of infliximab (INF) combination therapy with leflunomide (LEF) or azathioprine (AZA) in patients with rheumatoid arthritis (RA). METHOD: A standardized questionnaire on the use of INF in combination with LEF or AZA was mailed to hospital physicians and collected over a 2 month period. Adverse events (AE) and the reasons for withdrawal of combination therapy were analyzed. RESULTS: Data on 225 patients with RA were collected retrospectively. INF was used in combination with LEF in 171 patients and with AZA in 54. The duration of INF exposure was similar in both groups (mean 8.8 mo). AE were reported in 75 patients (33.3%), 60 LEF/INF (35%) and 15 AZA/INF combinations (27.8%) (p=nonsignificant). No unexpected AE were observed. The main AE were infections (6.2%), cytopenia (5.8%), hepatotoxicity (5.8%), reactions to infusion (5.3%), and skin reactions (4%). At the time the questionnaires were sent out, 161 patients were continuing combination therapies. The main reasons for drug withdrawal were AE (53 patients, 23.5%), inefficacy (10 patients, 4%), and one temporary discontinuation for surgery. CONCLUSION: Our study suggests that INF used in combination with LEF or AZA could be an alternative to methotrexate/INF combinations.

Bone and joint infection due to Streptococcus pneumoniae in two immunocompetent adults.

Bone and joint infections due to Streptococcus pneumoniae are uncommon in adults in the absence of risk factors (e.g. alcohol abuse, immunodepression, or preexisting joint disease). We report two cases in previously healthy adults. The clinical picture was septic arthritis of the knee in one patient and discitis with an extensive epidural abscess in the other. The characteristics of S. pneumoniae bone and joint infections are reviewed, with emphasis on risk factors. The therapeutic strategy is discussed in the light of the recent upsurge in S. pneumoniae strains with reduced susceptibility to penicillin.

Sciatica, disk herniation, and neuroborreliosis. A report of four cases.

We report four cases of sciatica in patients with same-level disk herniation confirmed by computed tomography and a final diagnosis of acute radiculitis caused by Borrelia burgdorferi, with a favorable response to ceftriaxone therapy. The neurological manifestations of Lyme disease are protean, and a potential contribution of concomitant disk disease to sciatica can lead to diagnostic wanderings. Disk lesions and infectious conditions that can cause sciatica are discussed. Whether a favorable response to antibiotic therapy should be taken as proof of B. burgdorferi radiculitis deserves discussion. In practice, in a patient with clinical manifestations suggesting disk-related nerve root pain and residing or having traveled to an endemic area, B. burgdorferi infection should be looked for, as both etiologies can coexist.

Occupational bone diseases.

Occupational bone diseases are uncommon, with fewer than 400 cases recognized in France since 1990, although many cases have escaped diagnosis. The symptoms lack specificity, raising diagnostic challenges. Greater awareness of these conditions and of their pathophysiological mechanisms would provide much needed improvement in diagnosis and prevention.

Bed rest or normal activity for patients with acute low back pain: a randomized controlled trial.

BACKGROUND: The management of common low back pain has two principal objectives: to relieve acute pain and to attempt prevention of transition to chronicity. Several studies have shown the ineffectiveness of prolonged periods of bed rest. OBJECTIVE: To compare 4 days of bed rest with continued normal daily activity in acute low back pain, taking into account the type of work (physical or sedentary labor). METHODS: This open, comparative multicenter study enrolled 281 ambulatory patients, ages 18 to 65 years, with low back pain (onset < 72 hours). The subjects did not have pain radiating below the buttocks and did not have work-related injuries. They were randomized into two treatment groups: one instructed to continue normal activity (insofar as the pain allowed), and the other prescribed 4 days of bed rest. After inclusion, patients were seen at three visits: on day 6 or 7, after 1 month, and after 3 months. RESULTS: On day 6 or 7, pain intensity was similar for both groups, as was the overall judgment of the treatment by patients and physicians. At 1 and 3 months, the groups again had equivalent intensity of back pain, functional disability, and vertebral stiffness. A higher proportion of patients in the bed rest group than in the normal activity group had an initial sick leave (86% vs 52%; P < 0.0001). This difference was greater for the patients whose work was sedentary. CONCLUSIONS: For patients with acute low back pain, normal activity is at least equivalent to bed rest. The findings of this study indicate that prescriptions for bed rest, and thus for sick leaves, should be limited when the physical demands of the job are similar to those for daily life activities.