Anemia for the Primary Care Physician

[Comparison of a portable hemoglobinometer (Verio Q Red) with clinical laboratory results in routine clinical practice]

OBJECTIVE

To analyze the concordance between a hemoglobinometer with capillary blood sample and the clinical laboratory with a venous blood sample.

DESIGN

Cross-sectional concordance study.

LOCATION

Care Centre Primary Bufalà-Canyet Primary and Care Centre Primary Dalt la Vila Primary Care Center, Badalona, Barcelona.

PARTICIPANTS

Random selection of participants who attended routine blood tests. Over 18years old. No abandonment or loss was obtained.

MAIN INTERVENTIONS AND MEASUREMENTS

Sex, age, and reason for the blood test were collected from the medical history. Venous blood is drawn, and simultaneously, capillary blood is collected.

RESULTS

120 individuals are included, with an average age of 58.9years. The Bland-Almant graph showed differences within the confidence intervals for hemoglobin and hematocrit. The mean differences between the values of the Verio Q Red hemoglobinometer and those of the clinical laboratory were -0.42mg/dl for hemoglobin and -1.25% for hematocrit. The intraclass correlation coefficient showed excellent correlation for hemoglobin and hematocrit between the Verio Q Red hemoglobinometer and the clinical laboratory. Pearson's correlation for hemoglobin was 0.737 and for hematocrit 0.787.

CONCLUSIONS

The Verio Q hemoglobinometer is a valid tool for the early diagnosis of anemias and can be very useful in primary care consultations.

Anemia after pancreaticoduodenectomy in patients followed-up for 5 years

BACKGROUND

Anemia is a common long-term metabolic sequela caused by anatomical changes after major gastrointestinal surgery, such as bariatric surgery and gastrectomy. Pancreaticoduodenectomy (PD) involves resection of the duodenum and enteral bypass, which may contribute to malabsorption and nutrient deficiency. Hence, PD may cause anemia.

METHODS

This study included 322 patients who presented with PD during the 5-year follow-up from 2006 to 2017. The Kaplan-Meier method and the Cox regression model were used to investigate the association between risk factors and anemia.

RESULTS

Approximately 44.4% of patients developed post-PD anemia during the 5-year post-PD follow-up. Further, 30 (9.3%) patients were treated with oral iron supplementation for anemia with associated symptoms. In the Cox multivariate model, a higher Charlson Comorbidity Index (CCI) score and pancreatic ductal adenocarcinoma were significantly associated with the development of post-PD anemia.

CONCLUSION

Post-PD anemia is a common sequela among long-term survivors. A higher CCI and pancreatic ductal adenocarcinoma diagnosis were considered as independent risk factors for post-PD anemia. Therefore, regular monitoring of hematological profiles and appropriate management of post-PD anemia are required during follow-up.

An Introduction to the Complete Blood Count for Clinical Chemists: Red Blood Cells

BACKGROUND

The most frequently ordered laboratory test worldwide is the complete blood count (CBC).

CONTENT

In this primer, the red blood cell test components of the CBC are introduced, followed by a discussion of the laboratory evaluation of anemia and polycythemia.

SUMMARY

As clinical chemists are increasingly tasked to direct laboratories outside of the traditional clinical chemistry sections such as hematology, expertise must be developed. This review article is a dedication to that effort.

Status and treatment of patients with uterine fibroids in hospitals in central China: a retrospective study from 2018 to 2021

OBJECTIVE

To evaluate the hospitalised patients with uterine fibroids (UFs) and describe treatment patterns in hospital-treated patients in central China from 2018 to 2021.

DESIGN

A retrospective analysis.

SETTING

The gynaecology departments of class A and class B secondary and tertiary hospitals in Hubei Province, China.

PARTICIPANTS

101 008 patients diagnosed with UFs from 1 January 2018 to 31 December 2021.

RESULTS

The hospitalised patients with UFs increased with age, reaching a peak at ages 45-49 years and then gradually decreasing. Among these patients, 19.05% had anaemia symptoms. Women aged 25-29 years were more likely to be treated with laparoscopic myomectomy (62.22%), while women aged 20-24 years tend to choose open myomectomy (34.58%). Women over age 45 years who had entered perimenopause tended to be treated with laparoscopic hysterectomy (64.85% for those aged 65-69 years). Patients with fibroid with moderate-to-severe anaemia mostly chose hysterectomy. As a whole, the proportion of patients who chose laparoscopic hysterectomy was similar to that of patients who chose laparoscopic myomectomy (31.38% vs 31.14%). Only 2.08% of UFs were treated with high-frequency MRI-guided focused ultrasound surgery (MRgFUS). The number of patients who choose laparoscopic surgery or MRgFUS treatment was increasing year by year. After stratifying by hospital grade, we found that women treated at class A tertiary hospitals were more likely to have laparoscopic than open surgery (66.12% vs 31.26%). At class B secondary hospitals, 61.9% of the patients underwent myomectomy. By contrast, hysterectomy was used to treat the majority of patients at class A secondary hospitals and class B tertiary hospitals (57.79% and 57.57%, respectively). Use of MRgFUS was mainly concentrated within class A tertiary hospitals.

CONCLUSION

UFs affect mainly women in childbearing period. Most patients chose to receive treatment at class A tertiary hospitals, among which laparoscopic myomectomy was the mainstream surgical method for patients in Hubei Province.

TRIAL REGISTRATION NUMBER

NCT05840042.

Association of Preoperative Blood Transfusion on Postoperative Outcomes in Emergency General Surgery

INTRODUCTION

Emergency general surgery (EGS) patients often present with anemia, in which preoperative transfusions are performed to mitigate anemia-associated risks. However, transfusions have also been noted to cause worse postoperative outcomes. This study examined how transfusion-associated outcomes vary at different levels of anemia.

MATERIALS AND METHODS

The American College of Surgeons National Surgical Quality Improvement Program database from 2005 to 2019 was used to identify patients who had undergone any of 12 major EGS procedures using Current Procedural Terminology codes. Patients were divided into two cohorts based on receipt of preoperative transfusion. Cohorts were subdivided into anemia severity levels and propensity score-matched within each using patient demographic and comorbidity variables. We analyzed 30-day postoperative outcomes, including morbidity, mortality, and return to odds ratio (OR), using univariate Chi-squared tests, Wilcoxon signed-rank tests, and multivariate logistic regression analyses.

RESULTS

595,407 EGS cases were identified. Receiving preoperative transfusion were 44.45% (n = 3058) of severely anemic, 10.94% (n = 9076) of moderately anemic, 1.34% (n = 1370) of mildly anemic, and 0.174% (n = 704) of no anemia patients. Transfusion resulted in an increased overall morbidity in the severe (OR 1.54), moderate (OR 1.50), mild (OR 1.71), and no anemia (OR 1.85) groups. Mortality increased in the moderate (OR 1.27), mild (OR 1.61), and no anemia (OR 1.76) subgroups. In severe anemia, transfusion status and mortality were not significantly associated.

CONCLUSIONS

Transfusion is associated with higher morbidity and mortality rates in those with higher hematocrit levels, even after controlling for pre-existing comorbidities. A restrictive transfusion strategy should be considered to avoid risks for those with a hematocrit level more than 24%.

Evaluation of pro-atherogenic lipid profile and high atherohenic indexes in patients with Behçet's disease: A case-control study

BACKGROUND

Behçet's disease is a systemic auto-immune and auto-inflammatory chronic disease in which genetic and environmental factors play a role. Patients with Behçet's are at significant risk for developing many comorbidities, including cardiovascular diseases.

AIMS

It was aimed to investigate the relationship between serum lipid parameters and atherogenic indexes to evaluate the cardiovascular risk status in patients with Behçet's disease.

PATIENTS/METHODS

This study was designed as a single-center, retrospective case-control study. The study was conducted with 212 patients over 18 years of age, 106 in the case group and 106 in the control group.

RESULTS

There was a significant difference in lipid values between the patients with Behçet's disease and the control group. While the serum triglyceride, total cholesterol, low-density lipoprotein cholesterol (LDL-C), and non-high-density lipoprotein cholesterol (NHC) levels were significantly higher, the high-density lipoprotein cholesterol (HDL-C) level was low in patients with Behçet's disease. From atherogenic indexes, Atherogenic Index of Plasma (AIP) (0.03 ± 0.27 vs. -0.07 ± 0.23, p = 0.003), Castelli Risk Index I (CRI-I) (4.24 ± 1.07 vs. 3.02 ± 0.96, p < 0.001), Castelli Risk Index II (CRI-II) (2.65 ± 0.81 vs. 1.84 ± 0.59, p < 0.001) and Atherogenic Coefficient (AC) (3.24 ± 1.07 vs. 2.02 ± 0.96, p < 0.001) levels were significantly higher in patients with Behçet's disease.

CONCLUSION

Our study shows that patients with Behçet's have a higher pro-atherogenic lipid profile and atherogenic indexes at high risk. Patients with Behçet's have an increased risk of cardiovascular diseases associated with atherosclerosis.

Changes in the proportion of anemia among young women after the Great East Japan Earthquake: the Fukushima health management survey

This study aimed to evaluate the sequential changes in the proportion of anemia among young women over eight years after the Great East Japan Earthquake in 2011 using a prospective study of the Fukushima Health Management Survey. This study focused on the women aged between 20 and 44 who lived in the evacuation area of the nuclear power plant accident. The yearly age-adjusted proportion of anemia was accessed with data between July 2011 and March 2019. A total of 9,198 women participated in the health checkup in 2011, albeit the participation was decreased to 1,241 in 2018. The age-adjusted proportion of anemia was 16.7% in 2012 and then declined after 2013 (p with Cochran-Armitage trend test = 0.03). The multivariate regression analysis identified < 23 kg/m² of body mass index (BMI), no history of smoking, and no habitual alcohol use as independent baseline characteristics predictive of temporality anemic condition after the disaster (Adjusted odds ratios [95% confidence interval]; 1.98 [1.43-2.74], 1.85 [1.21-2.83], and 1.42 [1.07-1.90], respectively). Thus, women with low BMI and healthier habits might risk temporarily anemic status after the disaster. Our findings signal the importance of preventing anemia in young women after the disaster.

Diagnostic workup of cancer in patients with new-onset anaemia: a Danish cohort study in general practice

BACKGROUND

Anaemia is associated with adverse outcomes, including increased morbidity and all-cause mortality. Diagnostic workup of patients with anaemia is essential to detect underlying disease, especially undiagnosed malignancy.

OBJECTIVE

To describe the cancer-relevant diagnostic workup in patients with new-onset anaemia detected in general practice. An additional aim was to analyse associations between patient characteristics and the diagnostic workup.

DESIGN

Observational population-based cohort study using electronic laboratory and register data.

SETTING

Danish general practice.

SUBJECTS

Patients aged 40-90 years with new-onset anaemia (no anaemia in the preceding 15 months) detected in general practice. Patients were identified in Danish laboratory information systems and nationwide registries in 2014-2018.

MAIN OUTCOME MEASURES

We measured the proportion of patients receiving predefined diagnostic investigations, that is, cancer patient pathway, colonoscopy, gastroscopy, computerised tomography (CT) scan, faecal test for haemoglobin, and bone marrow examination within three months of the anaemia index date.

RESULTS

We included 59,993 patients, and around half of the patients with 'iron deficiency anaemia', 'anaemia of inflammation', or 'combined inflammatory iron deficiency anaemia' had no cancer-relevant diagnostic investigations performed. Patients aged 60-79 years and patients with severe anaemia were more likely to have investigations performed, while patients with comorbidity were less likely to have investigations performed.

CONCLUSION

Around half of the patients with anaemia subtypes that may indicate underlying cancer had no cancer-relevant diagnostic investigations performed. This may represent missed diagnostic opportunities. Future interventions are needed to improve the diagnostic workup of cancer in patients with anaemia, for example, laboratory alert systems and clinical decision support.KEY POINTSThe general practitioners are often the first to detect anaemia and its underlying disease (e.g. undiagnosed malignancy).Large-scale studies are needed on the diagnostic workup of patients with anaemia in general practice in relation to an underlying malignancy.This study shows that the majority of patients with anaemia had no cancer-relevant diagnostic investigations performed, which may cause diagnostic delay.Interventions seems needed to improve the diagnostic workup of cancer in these patients to ensure timely diagnosis.

Insufficient classification of anaemia in general practice: a Danish register-based observational study

BACKGROUND

Anaemia can be a pointer of underlying severe disease, including undiagnosed malignancy. Subsequent blood tests are essential to classify the anaemia into subtypes and to facilitate targeted diagnostic investigation to ensure timely diagnosis of underlying disease.

OBJECTIVE

We aimed to describe and classify anaemia based on laboratory tests from patients with new-onset anaemia detected in general practice. An additional aim was to analyse associations between patient characteristics and unclassified anaemia (not classifiable according to an algorithm).

DESIGN

Population-based cross-sectional study.

SETTING

Danish general practice.

SUBJECTS

A total of 62,731 patients (age: 40-90 years) with new-onset anaemia were identified in Danish laboratory information systems and nationwide registries, and data were obtained for 2014-2018.

MAIN OUTCOME MEASURES

We measured the proportion of patients classified into subtypes of anaemia based on blood tests requested by general practitioners within 31 days of the anaemia index date.

RESULTS

Of the 62,731 patients with new-onset anaemia, we identified unclassified anaemia in 78.9% (95% confidence interval (CI): 77.3-80.5) of men and 65.1% (CI: 63.4-66.9) of women. The likelihood of unclassified anaemia increased with age, increasing comorbidity and decreasing severity of anaemia.

CONCLUSION

The majority of patients with new-onset anaemia could not be classified through a simple algorithm due to missing blood tests, which highlights a potential missed opportunity for diagnosis. Standardised laboratory testing of patients with anaemia is warranted to ensure adequate follow-up and early detection of underlying severe disease.KEY POINTSAnaemia can be a sign of malignancy, and anaemia classification is an important step in the diagnosis of underlying disorders.The majority of patients with anaemia could not be classified according to a simple algorithm due to missing blood tests.Some patient characteristics were associated with a high risk of unclassified anaemia: high age, high comorbidity, and severe anaemia.Standardised laboratory testing in patients with anaemia is needed to inform targeted diagnostic investigation to ensure timely diagnosis.

Anemia as a Problem: GP Approach

BACKGROUND

Anemia is a presentation of an underlying disease or deficiency. As stated by the WHO, anemia is defined as hemoglobin (Hb) levels <12.0 g/dL in women and <13.0 g/dL in men. This review of clinical practice aimed to determine the diagnostic approach to anemia in primary care patients.

SUMMARY

Nutritional deficiencies, medications, chronic inflammatory conditions, malignancy, renal dysfunction, and bone marrow and inherent disorders contribute to anemia development. Anemia is classified and diagnosed by the values of hematological parameters, underlying pathological mechanism, and patient history. The diagnostic approach of anemia in primary care settings is focused on history, physical examination, laboratory findings including complete blood cell count, reticulocyte count, and peripheral smear examination, fecal occult blood test, and ultrasound findings.

KEY MESSAGES

Anemia is the most common hematological disorder that represents a major health burden worldwide. Hb levels alter with gender, ethnicity, and physiological status. Anemia is often multifactorial. The evaluation of a patient with anemia in primary care includes clinical history, physical examination, and laboratory findings with fecal occult blood test and abdominal ultrasound. The wide variations in general practice in European countries are based on different health care systems but also knowledge of GPs that reflect educational and research policy.

Decision support system through automatic algorithms and electronic request in diagnosis of anaemia for primary care patients

Introduction

An appropriate management of anaemia laboratory tests is crucial for a correct diagnosis and treatment. A non-sequential “shotgun” approach (where every anaemia related test is ordered) causes workload and cost increases and could be potentially harmful. We have implemented a Decision Support System through our laboratory information system (LIMS) based on reflexive algorithms and automatic generation of interpretative reports specifically in diagnosis of anaemia for primary care patients.

Materials and methods

When a request contained an “Anaemia Suspicion Study” profile, more than twenty automatic reflexive rules were activated in our LIMS based upon laboratory results. These rules normally involved the addition of reflexive tests. A final report was automatically generated for each interpretation which was always reviewed for their validity by two staff pathologists. We measured the impact of this system in the ordering of most common anaemia related tests and if a proper treatment was established based on the interpretive report.

Results

From all the studies performed, only 12% were positive being “iron deficiency” and “anaemia of chronic disease” the most frequent causes, 62% and 17%, respectively. Proper treatment was established in 88% of these anaemic patients. Total iron, transferrin, ferritin, folate and vitamin B12 demand decreased substantially after implementation representing a cost reduction of 40% only for these five tests.

Conclusions

Our system has easily improved patient outcomes, advising on individual clinical cases. We have also noticeably reduced the number of over-requested tests and laboratory costs.

Case Report: Recurring Peritonitis and Dialysis Failure in a Toddler on Peritoneal Dialysis

We report a case of a 2-year-old-boy with end stage renal disease (ESRD) secondary to posterior urethral valves (PUV) on peritoneal dialysis (PD). Our patient developed multiple episodes of peritonitis, refractory anemia and feeding intolerance over a 12-month-period. He was treated with multiple courses of intraperitoneal antibiotics. Despite being on high-calorie formula, he was slowly thriving. The feeding intolerance was attributed to past history of prematurity, gastro-esophageal reflux disease and ESRD co-morbidities. He had anemia resistant to erythrocyte stimulating agents and iron supplementation. His family received re-training and mastered the PD techniques. They reported no breach of the aseptic techniques. His workup which included multiple AP abdominal XR-plain films were read as unremarkable and showed the gastrostomy tube (GT) and the PD catheter in good position. He completed his antibiotic courses as prescribed after each peritonitis episode, peritoneal fluid cultures repeated after each treatment completion showed no growth. During the last peritonitis episode, our patient developed ultrafiltration failure. A cross-table abdominal XR was obtained to evaluate the peritoneal catheter position and showed an intra-abdominal foreign body. During surgery, a needle was laparoscopically removed from the ileum and the PD catheter was replaced. Subsequently, our patient's feeding intolerance and resistant anemia resolved. Finally PD was successfully resumed.

A cross-sectional study on prevalence and determinants of anemia among women of reproductive age in a rural community of West Bengal

Context:

Anemia is a serious public health concern especially in women of reproductive age (WRA) as it causes a high burden of morbidity and mortality and persists through intergenerational cycle. As most of the risk factors are preventable, a thorough understanding of its risk factors is necessary to design better interventions.

Aims:

Current study aimed to estimate the burden of anemia as well as explore determinants of various grades of anemia among WRA in a rural area.

Settings and Design:

A community-based cross-sectional study was conducted among non-pregnant, non-lactating women of reproductive age in rural field practice area of All India Institute of Hygiene and Public Health.

Methods and Materials:

House to house visit was conducted for interviewing with pre-designed pre-tested questionnaire along with blood hemoglobin and anthropometric measurement.

Statistical Analysis Used:

Descriptive statistics and test of significance like multinomial logistic regression and Kruskal-Wallis test (with post-hoc) were used.

Results:

Majority (70.8%) of participants were anemic. Proportion of mild, moderate, and severe anemia were 24.16%, 37.5%, and 9.16%, respectively. Different levels of anemia were significantly associated with higher age, lower education, poor iron-rich food intake, lack of dietary diversity, and adiposity. Significantly low hemoglobin level in both underweight and obesity was noticed suggesting U shaped relationship between BMI and anemia.

Conclusion:

Periodic screening for anemia among WRA especially in both extremes of malnutrition, i.e., undernutrition and obesity should be considered at the policy level. Year-round behaviour change communication campaigns must be carried out for the promotion of necessary food groups in diet.

Unrecognized anemia after whipple - should we learn from gastric bypass?

INTRODUCTION

Several pathophysiologic changes after the Whipple procedure have been well described, but anemia has not. Post-surgical changes can impede micronutrient absorption. We hypothesize that patients post-pancreatoduodenectomy suffer from iron deficiency anemia.

METHODS

Patients who underwent a pancreatoduodenectomy from 2016 to 2018 were retrospectively evaluated. Preoperative, intraoperative, and postoperative data, including hemoglobin (Hb) levels and mean corpuscular volume (MCV) as well as therapies with chemoradiation, iron, and/or B12 were collected at 1-, 3-, 6-, and 12-months after surgery.

RESULTS

The dataset included 74 patients (median age: 64 years). Mean preoperative Hb and MCV were 11.7 ± 1.9 g/dl and 90.1 ± 7.3 fl, respectively. Significant changes in Hb were noted at 1 and 6 months (11.7 vs 10.9, p = 0.01 and 11.7 vs 11.3, p = 0.003, respectively), and in MCV were noted at 6 and 12 months (90.1 vs 94.6, p = 0.008 and 90.1 vs. 93.7, p = 0.02, respectively).

CONCLUSIONS

All patients remained anemic after pancreatoduodenectomy. This was not linked to chemotherapy. Iron and vitamin B12 supplementation, given in a minority, did not ameliorate the anemia. Future studies should investigate this lack of aid, as nutrient supplementation may be an important change in the standard of care of these patients.

Does aging have an impact on hemoglobin? Study in elderly population at rural teaching hospital

BACKGROUND

The prevalence of anemia increases with age. Some serious underlying conditions may lead to anemia in the old age. The present study was undertaken to detect and do morphological typing of anemia and further delineate etiological factors in elderly patients.

METHODS

In this hospital-based prevalence study carried out a tertiary care center over one and half years, a total of 90 patients were fully evaluated for etiology and typing of anemia in elderly (>60 years age) patients. Details of other significant medical and surgical history were noted. Laboratory investigations were conducted, which included complete hemogram, peripheral blood smear, reticulocyte count, erythrocyte sedimentation rate estimation, serum urea, serum creatinine and serum lactate dehydrogenase, bone marrow examination (with Prussian blue marrow iron staining), serum iron and serum total iron-binding capacity, serum ferritin, and stool and urine examination.

RESULTS

The mean hemoglobin as per age was 60-64 years- 5.95 gm%, 65-69 years - 6.7 gm%, 70-74 years - 6.58 gm%, and 75-79 years - 6.87 gm%. The difference not being significant (p = 0.33). Morphologically, 53 patients (24 males and 29 females) had microcytic anemia, 27 (17 males and 10 females) had normocytic anemia, and 10 (8 males and 2 females) had macrocytic anemia. Anemia of chronic disease (ACD) was the most common occurrence (50, 55.56%), followed by iron deficiency anemia (IDA) (27, 30%), macrocytic anemia (9, 10%), and others 4 (4.44%). The cause of anemia was found in 10 out of 27 (37.03%) patients in the IDA group, 28 out of 50 (56%) in the ACD group, whereas the etiology was discernible in only one out of nine cases (11.1%) of macrocytic anemias.

CONCLUSION

There was no significant difference observed in the mean hemoglobin levels as the age increased. Morphologically, the majority of the patients had microcytic anemia, followed by normocytic anemia. A population-based study is recommended for further assessment of the prevalence and causes of anemias in asymptomatic elderly subjects.

Hemoglobin Levels and Serum C-Reactive Protein in Patients With Moderate to Severe Hidradenitis Suppurativa

INTRODUCTION

Anemia of chronic inflammation is associated with many inflammatory diseases. Little is known about anemia in hidradenitis suppurativa (HS). This study aimed to review the levels of hemoglobin (Hb) and investigate its relationship with serum C-reactive protein (CRP) and disease severity in HS patients.

METHODS

This was a retrospective chart review of all HS patients from 2015 to 2017 with Hb and CRP blood work. Patient demographics, disease severity, and laboratory results were extracted. Data were analyzed descriptively. A linear regression model was used for the association between Hb and CRP. Two-tailed t-tests and one-way ANOVA were used to compare differences between sexes and disease severities.

RESULTS

Of the 25 patients included, 14 (56%) were female. The median age and disease duration of all patients were 41 years (range, 19-56 years) and 10 years (range, 1-40 years), respectively. The overall median CRP level was 11.5 mg/dL (range, 1-86.7 mg/dL). The median Hb levels for women and men were and 123.5 g/L (range, 90-142 g/L) and 152.0 g/L (range, 109-166 g/L), respectively. Anemia was found in 42.9% (6/14) of women and 27.3% (3/11) of men. There was an inverse relationship between Hb and CRP levels in both sexes (men: r = ‒0.88; P = .0006; women r = ‒0.65; P = .012).

CONCLUSIONS

Anemia was prevalent in the HS population, and Hb levels inversely correlated with CRP. Physicians should be aware that anemia is common in inflammatory states, and that CRP could be a biomarker in patients with HS.

Induction of deubiquitinating enzyme USP50 during erythropoiesis and its potential role in the regulation of Ku70 stability

Anemia is a very common blood disorder that affects the lives of billions of people worldwide. Anemia is caused by the loss of blood, increased destruction of red blood cells (RBCs), or reduced production of RBCs. Erythropoiesis is the complex process of RBC differentiation and maturation, in which protein degradation plays a crucial role. Protein ubiquitination regulates programmed protein degradation, which can be reversed by deubiquitinating enzymes (DUBs); however, the role of DUBs in erythropoiesis has not been well studied. We examined the expression of DUBs during erythropoiesis using an ex vivo human CD34+ hematopoietic progenitor cell culture system. Here we show that ubiquitin-specific protease 50 (USP50) levels are increased during erythropoiesis. USP50 mRNA levels are significantly increased on day 3 and protein levels are elevated on day 9 of erythroid differentiation. Coimmunoprecipitation and proteomics analyses reveal that Ku70, a DNA-binding protein, is associated with USP50. Overexpression of USP50 has no effect on Ku70 mRNA levels, while it reduces Ku70 protein levels by promoting Ku70 degradation, suggesting that USP50 may indirectly regulate Ku70 protein stability. USP50 protein is also not stable. USP50 protein degradation is independent of the proteasomal and the lysosomal degradation systems. This study suggests that DUBs like USP50 may regulate protein stability during erythropoiesis; however, more investigation is warranted.