Clinical characteristics and prognosis of amyopathic dermatomyositis patients with interstitial lung disease: insights from a retrospective cohort

Background: It is difficult to distinguish clinically between leiomyoma and leiomyosarcoma. The prognosis of the latter is poor. In patients with uterine leiomyosarcomas, high serum lactate dehydrogenase (LDH) levels have been reported to be elevated. However, little is known about serum LDH levels in patients with benign leiomyomas, or about the relationship between serum LDH levels and ultrasonographic findings. We therefore explored serum LDH levels and degenerative patterns of the tumor in ultrasonography (USG) in patients with various smooth muscle tumors of the uterus.Methods: Clinical history, serum LDH and alkaline phosphatase (ALP) levels, images produced by USG, and pathological findings were reviewed in 232 patients with uterine leiomyoma, three with uterine leiomyosarcoma, one with lipoleiomyoma, and one with metastasis of the breast cancer into uterine leiomyoma treated, at Kochi Nokyo General Hospital from September 1988 to August 1996. Relationship between serum LDH levels and the presence of degenerative pattern in USG or uterine weight was also analyzed.Results: Serum LDH levels were abnormally elevated preoperatively in one of 232 patients with uterine leiomyoma, two of three with leiomyosarcoma, one with lipoleiomyoma and one with metastasis of the breast cancer into uterine leiomyoma. A degenerative pattern in USG was found in 15/232 of leiomyomas, 2/3 leiomyosarcomas, 1/1 lipoleiomyoma and 1/1 metastasis of the breast cancer into uterine leiomyoma. All cases with abnormally elevated serum LDH levels showed a degenerative pattern in USG. There was a significant difference in serum LDH levels between leiomyoma with degenerative pattern in USG and without it (p=0.0320). No significant relationship was found between the weight of the uterus and serum LDH levels in patients with leiomyoma.Conclusion: The uterine tumor associated with both degenerative pattern in USG and elevated LDH levels in the patients' serum is strongly suspected to be leiomyosarcoma. The patients with presumed uterine leiomyoma should be examined for not only degenerative patterns in USG, but also serum LDH levels.

Elevated BALF concentrations of α- and β-defensins in patients with pulmonary alveolar proteinosis

Objective To investigate lactate dehydrogenase (LDH) level in serum of patients with advanced non-small cell lung cancer (NSCLC) before and after chemotherapy and the relationship of it with efficacy of chemotherapy and disease progression. Methods 57 patients with advanced NSCLC received standard first-line chemotherapy and some patients received second-line chemotherapy. The lung CT imaging changes were observed before and after chemotherapy. The serum LDH level was monitored during chemotherapy. The changes of serum LDH level and its relationship with efficacy of chemotherapy and disease progression were analyzed. Results The serum LDH level in patients with NSCLC was significantly higher than that in the normal. After first-line chemotherapy, the remissive group showed decreased LDH level, and the progressive group showed increased LDH level. LDH level in tumor recurrence was significantly higher than that in remissive period. After second-line chemotherapy for the progressive patients, the remissive group also showed decreased LDH level, and the progressive group showed increased LDH level. Conclusions Serum LDH level may reflect chemotherapy efficacy of lung cancer,and can be used to monitor recurrence of lung cancer. Key words: Lung cancer; Chemotherapy; Lactate dehydrogenase

Background:Pathology involving the oral epithelium may alter the level of salivary concentration of LDH. Thus its estimation can be used as a non invasive screening tool for the early detection of OPMDs and also to predict its malignant transformation especially in high risk population.Aims and Objectives:To evaluate the salivary and serum levels of lactate dehydrogenase (LDH) in patients having of oral submucous fibrosis (OSMF) and leukoplakia and compare it with healthy individuals.Materials and Methods:A total of 120 subjects were selected and divided into three groups comprising clinically diagnosed cases of OSMF and leukoplakia and healthy subjects as controls. Unstimulated whole saliva and blood samples were collected under aseptic conditions for biochemical estimation of LDH by Semiautomatic Analyzer using LDH kit utilizing enzymatic UV-Kinetic method. The values obtained were statistically analyzed using the SPSS software version 20.0. P-value < 0.05 was considered significant.Results:The mean salivary LDH level in Group I (OSMF) was 631.67 + 7.67, Group II (Leukoplakia) was 492.28 + 16.17 and Group III (Healthy Control) was 140.62 + 8.87. There was a statistically significant difference between the Serum and salivary LDH levels among the various groups of study population. A positive correlation between salivary LDH and serum LDH level was seen and the regression equation for OSMF and leukoplakia was computed.Conclusion:A significant difference was found between mean salivary LDH Levels and serum LDH levels in patients with leukoplakia, OSMF and health controls. A positive correlation was also established between salivary and serum LDH levels in patients with OSMF and leukoplakia patients making saliva a potent non invasive tool for early prediction and detection of PMOD and its malignant transformation.

Clinical significance of serum lactate and lactate dehydrogenase levels for disease severity and clinical outcomes in patients with colorectal cancer admitted to the intensive care unit

Serum lactate dehydrogenase (LDH) concentration is an indicator of tissue injury. It may be locally secreted in some conditions. This study was performed in order to investigate the value of LDH levels in bronchoalveolar lavage fluid (BALF) in the differentiation of a bening, from a malignant solitary pulmonary nodules (SPN) and to assess its relationship with serum LDH levels. The study was a prospective clinical study. It included 59 patients with a SPN. They underwent bronchoscopy with bronchoalveolar lavage (BAL). Both total serum and BAL LDH levels were measured. BALF LDH level was increased in all patients with malignant SPN. The mean BALF LDH level was significantly higher in patients with malignant SPN (342.23 +/- 89.98) as compared to the benign ones (17.62 +/- 7.90) (P < 0.001). There was no correlation between BALF LDH and serum LDH level in patients with SPNs (P = 0.595). BALF LDH levels are increased in patients with malignant SPN, but had no significant rise in benign SPN. This factor is useful in differentiating the benign SPNs from malignant SPNs.

To determine whether the subtypes of nonspecific interstitial pneumonia (NSIP) could be differentiated from other idiopathic interstitial pneumonias (IIPs) on the basis of findings on high-resolution computed tomography (CT). Two observers evaluated the high-resolution CT findings in 90 patients with IIPs. The patients included 36 with NSIP, 11 with usual interstitial pneumonia (UIP), 8 with cryptogenic organizing pneumonia (COP), 10 with acute interstitial pneumonia (AIP), 14 with desquamative interstitial pneumonia (DIP) or respiratory bronchiolitis-associated interstitial lung disease (RB-ILD), and 11 with lymphoid interstitial pneumonia (LIP). The NSIP cases were subdivided into group 1 NSIP (n = 6), group 2 NSIP (n = 15), and group 3 NSIP (n = 15). Observers made a correct diagnosis with a high level of confidence in 65% of NSIP cases, 91% of UIP cases, 44% of COP cases, 40% of AIP cases, 32% of DIP or RB-ILD cases, and 82% of LIP cases. Group 1 NSIP was misdiagnosed as AIP, DIP or RB-ILD, and LIP in 8.3% of patients, respectively. Group 2 NSIP was misdiagnosed as COP in 10% of patients, LIP in 6.7%, AIP in 3.3%, and DIP or RB-ILD in 3.3%. Group 3 NSIP was misdiagnosed as UIP in 6.7% of patients, COP in 6.7%, and DIP or RB-ILD in 3.3%. In most patients, NSIP can be distinguished from other IIPs based on the findings on high-resolution CT. Only a small percentage of patients with predominantly fibrotic NSIP (group 3 NSIP) show overlap with the high-resolution CT findings of UIP.

BackgroundIncreased levels of lactate dehydrogenase (LDH) as a tumor marker have been reported in malignant and some premalignant oral lesions such as oral lichen planus (OLP) and oral lichenoid reactions (OLRs). This study aimed to assess the level of total LDH in the saliva and serum of patients with oral squamous cell carcinoma (OSCC), OLP and OLRs.MethodsIn this case–control study, the participants were divided into four groups (n = 25) of healthy controls, OLP, OLRs, and OSCC. The serum and stimulated/unstimulated salivary levels of LDH were spectrophotometrically measured using standard LDH kits (Pars Azmoun). One-way ANOVA, Chi-square test, Pearson’s correlation test, and receiver operating characteristic (ROC) analysis were applied to analyze the data.ResultsThe serum and salivary levels of LDH in OSCC patients were significantly higher than that the corresponding values in other groups (P = 0.0001). The serum level of LDH in OLR group was significantly higher than that in the control and OLP groups (P = 0.0001), but the difference in salivary level of LDH was not significant. The ROC analysis showed that both the serum and salivary levels of LDH had significant diagnostic ability for detection of OSCC and OLRs. Significant associations were noted between the serum and salivary levels of LDH.ConclusionsPatients with OSCC and OLRs had higher serum levels of LDH than OLP and control groups. Further prospective longitudinal studies are required to assess the tissue level of LDH and monitor the transformation of OLRs because they have low rate of malignant transformation compared with other oral premalignant lesions.

BackgroundRecently, several studies investigated the association between lactate dehydrogenase (LDH) level and the prognosis of urothelial carcinoma. However, no studies explored the role of serum LDH level in the survival of overall bladder cancer (BC). In this study, we intended to address the association of LDH level with the prognosis of BC.Methods206 patients with BC were included in this study. The clinical data and blood samples of patients were collected. The overall survival and progression-free survival were used. Kaplan–Meier method and Log rank test were used to evaluate the effects of LDH level on the survival of BC. Univariate and multivariate Cox regression analyses were utilized to identify prognosis predictors of BC.ResultsData indicated that serum LDH level in the BC patients was significantly higher than those in controls. In addition, this study suggested that serum LDH level was associated with T stage, N stage, tumor size, M stage, pathological type, and lymphovascular invasion. The Kaplan–Meier analysis found significant differences in the OS and PFS rate between lower and higher serum LDH level groups (LDH ≥ 225 U/L and < 225 U/L). Multivariate Cox regression indicated that pathological type, T2–3, and higher level of LDH were independently associated with adverse prognosis in BC patients.ConclusionThe higher serum LDH level (≥ 225 U/L) is associated with poor prognosis in patients with BC. Serum LDH level could be used as a novel predictive biomarker for BC patients.

Idiopathic interstitial pneumonia (IIP) is a heterogeneous group of diseases comprising acute interstitial pneumonia, bronchiolitis obliterans organizing pneumonia (BOOP), nonspecific interstitial pneumonia, desquamative interstitial pneumonia, and idiopathic pulmonary fibrosis and usual interstitial pneumonia (IPF/UIP). We review the clinicopathological spectrum of IIP and introduce recent advances in classification, treatment, and prognosis. BOOP can be clinically categorized as an interstitial pneumonia, though prominent granulation tufts are seen in the airspaces. Though differences between the nonspecific interstitial pneumonia and other lips can be histopathologically clarified, the focus of clinical research on NSIP is differentiation from BOOP, or from IPF and UIP. IIP can be categorized into two groups: groups with acute or subacute lung injuries or fibrosis, such as in acute interstitial pneumonia, BOOP and nonspecific interstitial pneumonia, and groups with chronic injuries or fibrosis, such as IPF/UIP. This classification accords well with the maturity of fibrosis, CT findings, bronchoalveolar lavage fluid cell findings, and prognosis. The most critical problem is the treatment of IPF/UIP, because of its high mortality.

ORGANIZING PNEUMONIA: A RARE MANIFESTATION OF EARLY-ONSET SYSTEMIC LUPUS ERYTHEMATOSUS

The association of serum lactate dehydrogenase level with selected opportunistic infections and HIV progression

To analyze the high-resolution computed tomographic (HRCT) findings of IPF (interstitial pulmonary fibrosis), NSIP (nonspecific interstitial pneumonia) and COP (cryptogenic organizing pneumonia) retrospectively through quantification methods and to explore their distinguishing features. Observers with no prior knowledge of the diagnosis evaluated the frequency, extent and distribution of various thin-section CT findings in 29 males and 17 females. The mean age was 50 ± 10 years old (range: 25 - 76). They had a histological diagnosis of IPF (n = 19), nonspecific interstitial pneumonia (NSIP) (n = 14) and cryptogenic organizing pneumonia (COP) (n = 13). Ground-glass opacity, thickening of bronchovascular bundles and interlobular septal thickening were frequent features of IPF and NSIP. The frequency and extent of honeycombing and bronchiolectasis were more found in IPF than in NSIP and COP (P < 0.05). The frequency and extent of air space consolidation were more found in COP than IPF (P < 0.05). There were more number of segments with traction bronchiectasis and less extent of air space consolidation in IPF than NSIP and COP. The number of segments with traction bronchiectasis was less in NSIP than that of IPF and COP. The various subtypes of idiopathic interstitial pneumonias often have the distinguishing characteristics easily identified on HRCT. Bronchiolectasis and honeycombing are valuable features for IPF; air space consolidation is a valuable feature for COP. The features of NSIP are also found in both IPF and COP so that additional features are required for both.

BackgroundTo evaluate the value of serum Lactate Dehydrogenase (LDH) level in predicting recurrence and the overall survival (OS) of glioma patients. Materials and methodsA total number of 216 patients with glioma in our institution were retrospectively recruited to analyze the relationship between preoperative serum LDH level and prognosis. ResultsOverall, the median age of patients was 46.0 (31.0–57.0) years old; 53.7% (116 of 216) of the enrolled patients were male. Multivariate analysis revealed that serum LDH level (odds ratio [OR] = 0.97, 95% confidence interval [CI] = 0.96–0.98, P < 0.001) and World Health Organization (WHO) grade (grade II: OR = 19.64, 95%CI = 5.56–69.35, P < 0.001; grade III: OR =1 9.50, 95%CI = 7.08–53.73, P < 0.001; grade IV: OR = 15.23, 95%CI = 4.94–46.97, P < 0.001) were significant and independent of 1-year Progression-free survival (PFS) after adjusting for confounders. The predictive performance of serum LDH level was represented with area under curve (AUC) = 0.741, 95%CI = 0.677–0.798. Multivariate Cox analysis revealed that LDH level (hazard ratio [HR] = 2.56, 95%CI = 1.59–4.15, P < 0.001) and WHO grade (grade II: HR = 4.58, 95%CI = 0.56–37.23, P = 0.155; grade III: HR = 16.35, 95%CI = 2.16–123.80, P = 0.007; grade IV: HR = 42.13, 95%CI = 5.83–304.47, P < 0.001) remained associated with survival at 2-year follow-up. At 3-year follow-up, lymphocyte count (HR = 0.68, 95%CI = 0.51–0.91, P = 0.008), LDH level (HR = 2.21, 95%CI = 1.40–3.49, P = 0.001), and WHO grade (grade II: HR = 1.44, 95%CI = 0.44–4.68, P = 0.543; grade III: HR = 4.99, 95%CI = 1.68–14.87, P = 0.004; grade IV: HR = 16.96, 95%CI = 6.13–46.93, P < 0.001) remained associated with survival in multivariate Cox analysis. ConclusionOur study demonstrated that preoperative serum LDH level could serve as a reliable indicator for predicting prognosis of glioma patients. Further multicenter studies are still required to verify our findings.

Oxidant stress is thought to be involved in the establishment of idiopathic interstitial pneumonia (IIP). Thioredoxin 1 (TRX1) plays a role as a strong antioxidant in vivo, suggesting that TRX1 may be involved in the pathogenesis of IIPs. However, there is no report on TRX1 levels in the sera of IIPs. In addition, TRX1 expression in the lungs of non-specific interstitial pneumonia (NSIP) and cryptogenic organizing pneumonia (COP) patients also has not been reported. Here, we investigated whether or not TRX1 levels are altered in the lungs and sera of patients with idiopathic pulmonary fibrosis (IPF), NSIP, and COP. Immunohistochemical analysis was performed to examine the expression of TRX1. TRX1 levels in sera were measured using an ELISA kit. TRX1 was expressed in the bronchiole-alveolar epithelium, especially with regenerative or metaplastic feature, and in alveolar macrophages in usual interstitial pneumonia (UIP) and fibrotic NSIP. TRX1 was weakly expressed in the lungs of cellular NSIP and COP. TRX1 producing cells in UIP (n=16), fibrotic NSIP (n=15), cellular NSIP (n=4), and COP (n=5) were significantly increased when compared to nonsmokers (n=7). TRX1 producing cells in UIP and fibrotic NSIP were significantly increased when compared to cellular NSIP and COP. TRX1 levels in the sera of the patients with IPF (n=32; 74.2 ± 7.5 ng/mL), fibrotic NSIP (n=7; 82.5 ± 18.4 ng/mL), cellular NSIP (n=3; 62.2 ± 3.2 ng/mL) and COP (n=17; 88.8 ± 19.7 ng/mL) were significantly higher than those of control subjects (n=74; 35.3 ± 2.7 ng/mL). Furthermore, TRX1 levels in the sera of IPF patients who later showed acute exacerbation (n=7; 106.6 ± 16.3 ng/mL) were significantly higher than those of IPF patients without acute exacerbation (n=25; 65.1 ± 7.6 ng/mL). Overproduction of TRX1 in the lungs and sera may play an important role in the pathogenesis of IIPs.