Hepatitis B surface antigen levels: association with 5-year response to peginterferon alfa-2a in hepatitis B e-antigen-negative patients

Purpose

To investigate the durability of response to peginterferon alfa-2a up to 5 years post-treatment and factors associated with response in hepatitis B e-antigen (HBeAg)-negative patients.

Methods

HBeAg-negative patients received peginterferon alfa-2a (180 μg/week) ± lamivudine (100 mg/day) for 48 weeks as part of a multicenter, randomized study. The planned 5-year efficacy analysis included patients (n = 230) enrolled in the long-term follow-up study. On-treatment hepatitis B surface antigen (HBsAg) decline kinetics were analyzed retrospectively in a subgroup of patients with HBsAg data available at baseline, weeks 12, 24, and 48 on-treatment, and 6 months post-treatment (n = 120). Receiver operating characteristic analyses identified the on-treatment HBsAg levels associated with response at 1 and 5 years post-treatment.

Results

HBV DNA ≤2,000 IU/mL and HBsAg clearance at 5 years post-treatment were achieved by 23 and 12% of patients, respectively. High rates of HBsAg clearance at 5 years post-treatment were achieved by patients with HBV DNA ≤2,000 IU/mL at 1 year post-treatment (28%). Rates of HBV DNA ≤2,000 IU/mL at 1 year post-treatment were 47.2 and 43.4% in patients with ≥10% decline from baseline at weeks 12 and 24, respectively, compared with 16.4% (p = 0.0003) and 13.2% (p < 0.0004) in patients with a <10% decline. Rates of HBsAg clearance at 5 years post-treatment were 22.6 and 22.4% in patients with ≥10% decline at weeks 12 and 24, respectively, compared with 7.5% (p = 0.0161) and 3.8% (p < 0.0001) in patients with <10% decline.

Conclusions

Peginterferon alfa-2a results in increasing rates of HBsAg clearance during post-treatment follow-up in HBeAg-negative patients. On-treatment decline in HBsAg is significantly associated with long-term post-treatment response.     

Recurrence after incisional hernia repair: Results and risk factors

A relatively low success rate in recurrent incisional hernia repair has prompted us to review the effects of certain risk factors on the long-term outcome of our cases. In this study, 109 recurrent incisional hernias were repaired and reviewed between 7 and 92 months after the operation. The recurrence rate was 45.0%. Many conditions that have been implicated as causal factors in the occurrence of incisional hernias were not found to be associated with recurrence after repair. However, chronic constipation was determined to be the most prominent risk factor associated with late recurrence.     

The mutations in ISDR of NS5A gene are not associated with response to interferon treatment in Turkish patients with chronic hepatitis C virus genotype 1b infection.

BACKGROUND/AIMS: A significant association between variations in amino acid sequences resides between 2209-2248 nucleotides of HCV non-structural 5A (NS5A) gene, and response to interferon treatment has been proposed. The aim of this study was to determine whether the amino acid sequence changes in ISDR could be correlated to response to alpha interferon treatment in Turkish patients infected with HCV genotypes 1b and 1a. METHODS: Thirty-nine patients with chronic C virus infection (35 and 4 patients with genotype 1b and 1a, respectively), receiving 3x3-5 MU of interferon a-2b for six months were included in the study. Following PCR amplification of the region from pre-treatment serum samples, the products were directly sequenced. The amino acid sequence of NS5A was compared with the published sequence for HCV-J (AA 2209-2248). Mutant type was defined as three or more amino acid mutations, and intermediate type as 1-3 amino acids in this region. Otherwise, they were defined as the wild type (no amino acid mutations). HCV RNA serum viremia levels were analyzed by branched DNA assay. RESULTS: Eighteen patients were responders (R; 46%), whereas 21 patients were non-responders (NR; 54%). Amino acid changes in both R and NR groups did not show significant difference. Intermediate or wild type strains were detected in both groups. CONCLUSIONS: In this study, we could not determine a significant association between number of amino acid changes in NS5A2209-2248 and response to interferon treatment. In the majority of the patients, it seems that amino acid sequences in this region are well conserved.     

Rapid susceptibility test for Mycobacterium tuberculosis to isoniazid and rifampin with resazurin method in screw-cap tubes

Multi-drug resistant (MDR) Mycobacterium tuberculosis is still a serious public health problem all over the world. MDR tuberculosis (MDR-TB) caused by these strains has emerged within the last decade and rapid detection is critical for the effective treatment of patients. Recently, a resazurin microtiter assay plate for detecting MDR strains was developed. In this study, it was adapted to screw-cap tubes and the activity of isoniazid (INH) and rifampin (RIF) to 50 M. tuberculosis clinical isolates was tested by this method for the first time. Results were compared with the radiometric reference method for the susceptibility testing of M. tuberculosis complex. The results of both methods were in 100% and 96% agreement for RIF and INH, respectively. Specificity, sensitivity, positive predictive value and negative predictive value were 91.7%, 100%, 92.8% and 100% for INH, respectively. All of these values were 100% for RIF. Susceptibility testing results were obtained on the 8th day of incubation for 42 isolates and on the 9th day for the other eight strains. Our results indicate that this method is suitable for the early determination of INH and RIF resistance in developing countries because it is inexpensive, rapid and easy to perform.     

Congenital Seminal Vesicle Cyst Accompanying Ipsilateral Renal Agenesis and Rudimentary Ureter

Congenital seminal vesicle cysts are usually diagnosed as incidental sonographic findings in patients with voiding complaints. Rarely they could also be detected in asymptomatic cases. In our study, a seminal vesicle cyst associated with ipsilateral renal agenesis and ureteral bud remnant in an asymptomatic patient is presented.     

Is saphenofemoral junction reconstruction necessary during stripping of the saphenous vein?

BACKGROUND: Patients who had undergone complete ankle-to-groin stripping of the greater saphenous vein were evaluated retrospectively to assess the necessity of saphenofemoral junction reconstruction during the stripping procedure. Since 1996, in addition to the conventional complete stripping operation, we routinely perform a saphenofemoral junction reconstruction in patients presenting with greater saphenous vein reflux associated with low-grade (grades I-II) saphenofemoral junctional reflux. In this method, the size of the common femoral vein was adjusted to the desired diameter by a running linear suture technique after division of the greater saphenous vein. METHODS: Retrospective evaluation revealed that 73 limbs in 56 patients treated with this technique (group I). This group of patients was matched to another group of 65 patients (78 limbs) with similar characteristics and symptoms (group II) in whom the conventional complete ankle-to-groin stripping of greater saphenous vein was the treatment. The 2 groups were compared with respect to the incidence of complications, including recurrence of varicosities, ecchymosis, lymphocele, lymphorrhagia, wound infection, and paresthesia in the operated extremity. All patients also were evaluated by Doppler ultrasonography at 6 months, 12 months, and annually thereafter to determine the saphenofemoral junction reflux time (valve reflux time). The mean duration +/- SD of follow-up was 6.7 +/- 1.6 years (range, 2.1-10.8 years). RESULTS: Recurrence of varicosity was noted in 14 patients, 3 in group I and 11 in group II (P = .02). There were no statistically significant differences between the 2 groups in terms of ecchymosis, hematoma, lymphocele, lymphorrhagia, wound infection, and paresthesia. At 6 months, a rapid decrease in valve reflux time was noted in group I (P = .0001). In addition, there was a significant improvement in valve reflux time at each subsequent Doppler examination in group I. Group II showed a decrease in valve reflux time, compared with the preoperative value (P = .068). During subsequent Doppler examinations, a decrease in valve reflux time also was noted in group II; this difference reached statistical significance only at 24 months (P = .04). CONCLUSIONS: We believe that saphenofemoral junction reconstruction is a simple technique to perform and that addition of this method to the conventional stripping provides more durable results with a lesser incidence of recurrence. This method should be considered as a treatment modality in patients with greater saphenous vein reflux associated with low-grade (grades I-II) saphenofemoral junctional reflux.