Acute Renal Infarction Research Articles

Acute Renal Infarcts from Spontaneous Intra-Renal Dissection: Case Series with a Review of Literature

Introduction: To explore the causes and management of renal infarction from pathologies such as renal artery fibromuscular dysplasia and spontaneous dissection. It is a rare occurrence and often misdiagnosed in clinical practice. Methods: We present four patients, between 30-50 years of age, who have no underlying cardiac conditions, hypertension or diabetes mellitus. They presented with abdominal/loin/flank pain due to spontaneous renal artery dissection and were treated with endovascular stents. Two patients had renal artery fibromuscular dysplasia, confirmed by CT angiogram. Results: All four patients recovered fully from the operation, with no post-operative complications noted. These patients were post-operatively managed medically with anti- platelet therapy for two years and have not experience any post-procedural complications at their 24-month follow up

Isolated acute renal infarction in an obese patient

Background: Uncontrolled cardiovascular (CV) risk factors is been related to a higher incidence of atherosclerosis. Obesity itself could predispose to significant cardiac disease including arterial atheromatous leading to acute events. Case: A 46 years old obese patient who presented with left abdominal pain radiating to the left quadrant and left testicle. No significant abnormality was observed in the laboratories, but imaging showed left renal lower pole may be due to renal infarct (Figure 1), and CT-Angiography (CTA) of the abdomen showed infarction of the anterior two-thirds of the lower pole of the left kidney (Figure 2) secondary to occlusion of the supplying small inferior segmental artery and minimal atherosclerosis. Transthoracic Echocardiogram (TTE) showed a density in the LVOT may be artifact vs. calcification (Figure 3). A transesophageal echocardiogram (TEE) showed Grade III atherosclerotic changes of descending aorta (Figure 4), aortic arch, and a mobile plaque seen in the thoracic aorta. Conclusion: Cardiovascular risk factors have been associated with multiple vascular complications. Obesity as a single cardiovascular risk factor is associated with advanced arterial disease; our case is an example of an unstable atheromatous lesion causing thrombosis and ischemia in the kidney in a patient without another risk factor for thrombosis.

Usefulness of serum d-dimer level in acute renal infarction

Acute renal infarction (ARI) is a rarely encountered disease in emergency services, but is of particular importance owing to higher mortality and morbidity rates in the absence of early diagnosis and intervention. On the other hand, urolithiasis cases are admitted to emergency departments very frequently with the complaint of pain. ARI with non-specific symptoms or urolithiasis-like pain would increase the likelihood of being omitted in crowded emergency rooms. Previous studies reported supportive diagnostic role in ARI of increased serum lactate dehydrogenase and C-reactive protein levels and white blood cell count in the presence of hematuria; however, none mentioned D-dimer as a likely diagnostic or prognostic marker. We hereby present 2 case reports where a contrast-enhanced tomographic scan performed on the basis of suspicions raised by high serum D-dimer levels which established the definitive diagnosis ARI. Our aim was to emphasize that serum D-dimer may be used as a criterion for supporting or excluding the thromboembolic events, such as renal and mesenteric infarction.

Clinical differentiation between acute renal infarction and acute ureteral stone in the emergency department: A single-center retrospective case-control study.

Few studies have compared renal infarction (RI) and ureteral stone (US), so there is insufficient evidence for emergency clinicians (ECs) to quickly suspect RI during the first assessment. Therefore, we compared the initial clinical presentation and laboratory findings of these diseases in the emergency department (ED) to determine a factor that may indicate RI. This single-center retrospective case-control study included 42 patients with acute RI and 210 with US who visited the ED from 2014 to 2020. Medical record data from first ED arrival were investigated, and clinical presentations, blood and urine test results obtained in the ED were compared and analyzed using logistic regression analysis. ECs never suspected the initial diagnosis of RI as RI. The most common initial diagnosis was US (40.5%). Among patients with US, 150 patients (71.4%) were suspected of having US (p < 0.001). Abdominal pain (61.9%) was the most common chief complaint in the RI group, and flank pain (73.8%) was the most common in the US group (p < 0.001). 27 factors showed significant differences between the groups. Among those, age ≥ 70 years (odds ratio [OR]: 311.2, 95% confidence interval [CI]: 2.0-47,833.1), history of A-fib (OR: 149872.8, 95% CI: 289.4-7.8E+07), fever ≥37.5 °C (OR: 297.3, 95% CI: 3.3-27,117.8), Cl- ≤ 103 mEq/L (OR: 9.0, 95% CI: 1.0-80.1), albumin ≤4.3 g/dL (OR: 26.6, 95% CI: 2.1-330.3), LDH ≥500 IU/L (OR: 17.9, 95% CI: 1.8-182.5), and CRP ≥0.23 mg/dL (OR: 7.5, 95% CI: 1.1-52.3) showed significantly high ORs, whereas urine RBCs (OR: 0, 95% CI: 0-0.02) showed a low OR (p < 0.05). The regression model showed good calibration (chi-square: 6.531, p = 0.588) and good discrimination (area under the curve = 0.9913). When differentiating acute RI from US in the ED, age ≥ 70 years, history of A-fib, fever ≥37.5 °C, LDH ≥500 IU/L, Cl- ≤ 103 mEq/L, albumin ≤4.3 g/dL, CRP ≥0.23 mg/dL and negative urine RBC result suggest the possibility of RI.

148 Acute Renal Infarcts from Spontaneous Intra-Renal Dissection

Abstract Spontaneous renal artery dissection and acute renal infarcts are rare occurrences and often misdiagnosed in clinical practice. We present four male patients, between 30-50 years of age, who have no underlying cardiac conditions, hypertension, or diabetes mellitus. They presented with abdominal/loin/flank pain due to spontaneous renal artery dissection and were all treated with endovascular stenting. Two patients had renal artery fibromuscular dysplasia, confirmed by CT angiogram, a rare pathology which is reported in literature to mostly affect women. All four patients recovered fully from the operation, with no post-operative complications noted. These patients were post-operatively managed medically with anti-platelet therapy for two years and did not experience any post-procedural complications at their 24-month follow up. Classically visceral artery dissection can be managed by anti-platelet therapy alone, however fibromuscular dysplasia can cause spontaneous dissection with renal infarcts and this requires urgent treatment with endovascular stents. Further research is needed on the post-procedural medical management guidelines.

POS-197 AN UNUSUAL CAUSE OF RENAL ARTERY THROMBOSIS LEADING TO ACUTE RENAL INFARCTION

Renal artery thrombosis is a rare and often misdiagnosed condition that can lead to acute kidney injury and/or infarct.[1] Nephrologists and other physicians must consider this condition in cases of unexplained abdominal pain and acute kidney injury. We believe the distribution of mural thrombus in the following case led to a novel presentation of acute renal infarction.

Acute renal infarction: long-term renal outcome and prognostic factors.

Acute renal infarction is a rare occurence, whose prognosis and long-term outcomes remain poorly studied. This study evaluated whether clinical and radiological features at diagnosis can be associated with the long-term outcomes (blood pressure, kidney function and mortality). We retrospectively analyzed the demographic, clinical, biological and radiological data of patients with acute renal infarction hospitalized at Rennes University Hospital between 1997 and 2017 (n = 94). Patients were followed-up for a median of 60months. At time of diagnosis ofacute renal infarction median age was 53years, 45% of thepatientshad acute hypertension, and 31% had Acute Kidney Injury (AKI) requiring dialysis in seven patients. The median Lactate DeHydrogenase (LDH) level was 977IU/mL. The median extent of kidney damage was 14%, with left renal involvement in 51% of patients. At 60months of follow-up, 66% of patients had developedChronic Kidney Disease (CKD) stage 3 or higher, and 55% had hypertension since diagnosis. Age, acute development ofhypertension and AKI at diagnosis were associated with long-term CKD(stage 3 or higher) in multivariate analyses, but the extent of kidney damage was not. During the follow-up, 21% of patients died, andonly age resulted as apredisposing factor. No testedfactor was correlated with long-term hypertension. Age, acute development ofhypertension, and AKI were correlated with long term CKD, whereas no factor was correlated withlong-term hypertension after acute renal infarction.

Incidence and Risk of Various Types of Arterial Thromboembolism in Patients With Cancer

ObjectiveTo describe the temporal association and identify risk factors between cancer diagnosis and various types of arterial thromboembolism (ATE). Patients and MethodsWe inquired an aggregated electronic health record database (Explorys, IBM Corp., Armonk, New York) and identified patients with cancer from January 1999 to October 2019, with various types of ATE, including myocardial infarction, acute ischemic stroke, acute limb ischemia, acute mesenteric ischemia, acute renal infarction, and retinal artery occlusion. We investigated the temporal relationship between cancer diagnosis and ATE events by examining the incidence ratio (IR) of ATE before and after diagnosis of cancer. ResultsWe identified 305,384 patients with cancer and ATE. The 30-day interval IR of total ATE was elevated shortly before and after cancer diagnosis, which was consistent among different ATE and cancer types. The incidence was highest within a 330-day window (90 days before and 240 days after cancer diagnosis), and IR peaked at 13.9 (95% confidence interval [CI], 13.6 to 14.2) in the first 30 days following diagnosis of cancer. Compared with patients with cancer who never developed ATE, patients with ATE had more cardiovascular risk factors at baseline. Patients with brain cancer, lung cancer, colorectal cancer, and pancreatic cancer had the highest risk of developing ATE, whereas ATE type was anatomically associated with cancer type. ConclusionIn this observational study of an aggregated US patient population, those with newly diagnosed cancer had increased risk of ATE events. This risk was most elevated in a 330-day window around cancer diagnosis and was consistent across different types of ATE and cancer.

Application of Etiology List in Differential Diagnosis of Acute Abdominal Pain&amp;lt;sup&amp;gt;#&amp;lt;/sup&amp;gt;

Objective: To use the etiology list of abdominal pain to help identify acute abdominal pain. Methods: to design a list of causes of acute abdominal pain as per the concept of system thinking, determine the five differential diagnosis directions of “local organ disease, adjacent organ disease, systemic disease, psychogenic disease, and female reproductive system disease”, and elaborate the application effect of the checklist in the diagnosis of acute abdominal pain by virtue of the analysis of one case of acute abdominal pain. Results: according to the list of causes of abdominal pain, the causes of acute abdominal pain were screened, and patients suffering from acute renal infarction (ARI) who presented with simple abdominal pain were diagnosed and treated timely. Conclusion: the etiology list is helpful to guide the diagnosis direction of acute abdominal pain, and make a rapid clinical diagnosis, so as to form a systematic thinking mode.

Bilateral acute renal infarction treated by endovascular therapy: A case report and literature review

Renal infarction is a rare emergency and the estimated incidence is extremely low according to the literature. In addition, simultaneous bilateral renal infarction was only about 20% in these rare cases. Herein we reported a case of acute renal failure related to bilateral renal infarction and successfully treated by endovascular therapy including angioplasty and catheter-directed thrombolysis. His renal function also significantly improved after the intervention. This rare case reminds physician that early endovascular therapy might improve renal function and result in better renal outcome for patients with simultaneous bilateral renal infarction.

"Renal emergencies: a comprehensive pictorial review with MR imaging".

Superior soft-tissue contrast and high sensitivity of magnetic resonance imaging (MRI) for detecting and characterizing disease may provide an expanded role in acute abdominal and pelvic imaging. Although MRI has traditionally not been exploited in acute care settings, commonly used in biliary obstruction and during pregnancy, there are several conditions in which MRI can go above and beyond other modalities in diagnosis, characterization, and providing functional and prognostic information. In this manuscript, we highlight how MRI can help in further assessment and characterization of acute renal emergencies. Currently, renal emergencies are predominantly evaluated with ultrasound (US) or computed tomography (CT) scanning. US may be limited by various patient factors and technologist experience while CT imaging with intravenous contrast administration can further compromise renal function. With the advent of rapid, robust non-contrast MRI, and magnetic resonance angiography (MRA) imaging studies with short scan times, free-breathing techniques, and lack of ionization radiation, the utility of MRI for renal evaluation might be superior to CT not only in diagnosing an emergent renal process but also by providing functional and prognostic information. This review outlines the clinical manifestations and the key imaging findings for acute renal processes including acute renal infarction, hemorrhage, and renal obstruction, among other entities, to highlight the added value of MRI in evaluating the finer nuances in acute renal emergencies.

Clinical Approach to Renal Artery Thromboembolism

Objective: We aimed to reveal the clinical, laboratory, radiological findings of infarction in the renal artery and its branches due to thrombosis, its effects on renal functions and the measures to be taken. Materials and Methods: The study sample included 8 patients who were admitted to the emergency department of Kutahya University of Health Sciences Evliya Celebi Training and Research Hospital between 2018-2020, and who were hospitalized with the diagnosis of acute renal infarction. Patients were retrospectively analyzed with clinical findings, CT angiography-abdomen, clinical observations, prognosis and complications. Results: Of the patients, 5 were male and 3 were female. The mean age was 55.13 (29-69) years. One patient presented with bilateral renal infarction, while 7 had unilateral renal infarction. The etiology of the patients was idiopathic in 2, atrial fibrilation (AF) in 3 patients, and atherosclerosis in 3 patient. The mean serum creatinine of 1.24 (0.7-3.2) mg/dl and the mean blood leukocyte level of 16925 (11000-26000) mcL were determined. The mean length of hospital stay was 4.6 (3-7) days. Anticoagulant therapy was initiated in all patients for risk of recurrent renal infarction and thromboembolism. Conclusion: We revealed that renal infarction, rarely seen in urology practice, has nonspecific clinical findings; therefore, it should be kept in mind in differential diagnosis for patients presenting with sudden-onset oblique or abdominal pain, and that diagnosis can be made using contrast-enhanced CT. We determined that AF and valvular heart diseases which cause atherosclerosis and cardiac thrombosis play an important role in the etiology.

Renal artery thrombosis following synthetic cannabinoid ingestion

Cannabis and synthetic cannabinoids have been associated with cardiovascular events including myocardial infarction, arrhythmias, and stroke. The psychoactive cannabinoid delta-9-tetrahydrocannabinol (THC) is a partial agonist for cannabinoid receptors found in the brain, vascular endothelium, liver, and adipose tissue. THC has been implicated in cases of cannabis arteritis and vasculopathy. We describe a case of acute renal artery infarction following synthetic cannabinoid ingestion, with successful thrombolysis and revascularization.

Clinical diagnosis and treatment of acute renal infarction

目的 探讨急性肾梗死的临床特点、鉴别诊断及治疗要点。 方法 对本院收治的2例急性肾梗死的临床资料进行回顾性分析。 结果 1例表现为无痛性全程肉眼血尿，腹部CT平扫及强化提示左肾实性占位，考虑肾癌，经手术治疗确诊；另1例表现为左腰部胀痛不适，在外院按输尿管结石予抗感染、解痉治疗无效，后于本院行腹部B超、强化CT检查诊断为急性右肾后下部梗死，予尿激酶、静脉滴注溶栓治疗，同时予抗凝、抗感染、扩血管、止痛等对症治疗，症状逐渐治愈出院。 结论 急性肾梗死临床少见，且表现也各不相同，对临床表现可疑者，及时行相关检查以尽早诊治。

Infarto Renal Agudo: ¿Cómo llegar a su diagnosticada?

Infarto Renal Agudo: ¿Cómo llegar a su diagnosticada?

Catheter-directed thrombolysis for acute renal infarction

Acute renal infarction is an uncommon disease, which is frequently misdiagnosed or diagnosed late because of its nonspecific clinical presentation, and may result in irreversible damage to the renal parenchyma. Here, we present a case of acute renal infarction in a 51-year-old male, presenting with left flank pain and being diagnosed through computed tomography. We successfully performed catheter-directed thrombolysis to rescue the ischemic renal tissue and preserve the renal function.

Clinical characteristics of patients with acute renal infarction: an analysis of 52 patients in a single center

OBJECTIVE To investigate the clinical characteristics of patients with acute renal infarction (ARI) and explore the possible clinical and/or laboratory parameters relative to hematuria. METHODS Medical records of 52 patients hospitalized with radiologic proven ARI were retrospectively reviewed. Clinical characteristics, including demographic data, risk factors for thromboembolism, initial clinical presentations, laboratory data, diagnosis, treatment programs and outcomes were evaluated and compared between hematuria(+) and hematuria(-) patients. RESULTS The mean age of the patients (34 men and 18 women) was (56.3±14.8) years. The left, right, and bilateral kidneys were involved in 44.2%, 34.6% and 21.2% of the patients, respectively. Focal, multiple and massive infarctions were involved in 36.5%, 50.0% and 13.5% of the patients. The prevalence of concurrent thromboembolic events was 38.5%. Atrial fibrillation was complicated in 44.2% of the patients. ARI often presented with nonspecific symptoms, including abdominal/flank pain (71.2%), nausea (55.8%), lumbar pain (53.9%), vomiting (48.1%), fever (48.1%), and diarrhea (21.2%). Percussion tenderness over kidney region was the most common sign (40.4%). The levels of serum lactate dehydrogenase, white blood cell count and C-reactive protein were elevated in 86.5%, 67.3%, and 54.5% of cases, respectively. Hematuria was detected in only 38.5% of the cases on admission. Elevation of serum D-dimer was only noted in 56.5% of the patients. The median duration from hospital presentation to diagnosis was 41.5 h (range: 2-552 h). Contrast-enhanced computed tomography was diagnostic in 47 (90.4%) cases. Angiography was positive in the other 5 (9.6%) cases. Anticoagulation was the most common therapy. During a mean follow-up of (39.4±35.8) months, renal functions of most patients were stable. Four patients needed permanent dialysis and one patient died of heart failure. There was no statistical significance between hematuria (+) group and hematuria (-) group for all the parameters except the level of serum lactate dehydrogenase, which was higher in hematuria(+) group [773.5 IU/L (range: 153.0-3 159.0 IU/L) vs. 488.0 IU/L (range: 137.0-3 370.0 IU/L), P=0.041]. CONCLUSION Thromboembolism due to heart disease is the main etiology of ARI. Early contrastenhanced computed tomography scan should be considered for high-risk patients with persisting abdominal or lumbar pain and elevated serum level of lactate dehydrogenase. Hematuria is not a sensitive clue for diagnosis and is not relative to prognosis. Whether it is present may be determined by the severity of infarction.

Akut nyreinfarkt: En sjælden årsag til akut abdomen

Acute Renal infarction is a rare cause of acute abdomen that may cause irreversible kidney damage.&#x0D; The presenting symptomatology is nonspecific and mimics other more common conditions, which leads to delay in diagnosis.&#x0D; If diagnosis is made early by contrast-enhanced computed tomography proper treatment can be planned to preserve kidney function.&#x0D; We report a case of renal infarction in a 45 year old man with acute abdominal pain were diagnosis was missed at initial assessment with non-contrast CT.

Spectrum of acute kidney injury associated with cocaine use: report of three cases

BackgroundThe consequences of cocaine use are multisystemic, such as, for instance, renal failure, hepatotoxicity and pulmonary toxicity, with renal alterations being the focus of the present study. The use of substances that modify the base composition of cocaine (or adulterants) aiming to potentiate its effects also has an impact on these manifestations. The present study aims to report three cases with different diagnosis of acute kidney injury related to cocaine use.Case presentationCase 01 - A 30-year-old female patient, who regularly used cocaine, started to have lower-limb edema, which showed a progressive and ascending evolution, affecting the face a few days later, associated with an isolated febrile episode and oligoanuria. The presence of cytoplasmic antineutrophil cytoplasmic antibodies (C-ANCA) was verified: reactive 1:80, with renal biopsy compatible with rapidly progressive glomerulonephritis (RPGN). Case 02 - A 34-year-old female patient, with difficult-to-control hypertension and a frequent user of cocaine, showed generalized sudden edema together with diffuse and progressive pruritus associated with oliguria, fever, nausea, and vomiting. Schistocyte screening was positive, with negative direct Coombs test, and negative serologies for hepatitis B, C and HIV, as well as negative anti-double-stranded DNA, Anti-SSA and Anti-SSB. The renal biopsy was compatible with thrombotic microangiopathy, associated with moderate interstitial fibrosis and acute tubular necrosis Case 03 - A 25-year-old male patient who had been a cocaine user for 5 years had a sudden onset of generalized disabling myalgia (especially in the lower limbs) associated with recent frontotemporal headache, palpitation, dizziness, and a non-measured febrile episode; the patient had used cocaine at the night before symptom onset. CPK was 1731 U/L.The final probable diagnosis was AKI secondary to cocaine-induced rhabdomyolysis.ConclusionsIn conclusion basically, 05 etiologies of acute kidney injury should always be remembered: rhabdomyolysis, thrombotic microangiopathy, vasculitis, acute interstitial nephritis and renal infarction. Emphasis should be given to rhabdomyolysis due to its higher prevalence. Considering the increasing rates of cocaine use, especially with the use of adulterating substances, these pathologies will likely be increasingly prevalent.

Idiopathic versus Provoked Renal Infarction: Characteristics and Long-Term Follow-Up of a Cohort of Patients in a Tertiary Hospital

Background: There is limited evidence on the etiology and outcomes of renal infarction. A provoking factor is identified only in one- to two-thirds of patients. Methods: This is a retrospective observational study. The clinical characteristics and outcomes of patients with acute renal infarction were studied; the sample was divided into two groups according to the presence of at least one provoking factor at the time of diagnosis (atrial fibrillation, flutter, major thrombophilia, or renal artery malformations). Results: The study comprised 59 patients with a mean age of 63 (±16.7) years and a follow-up period of 3.1 (±2.8) years. An identifiable provoking factor was found for 59.3% of the renal infarctions at the time of diagnosis, and atrial fibrillation was the most frequent one (in 49.2% of all patients). Renal impairment was found in 49.2% of the patients at diagnosis and in 50.8% of the patients 6 months after the event (p = 0.525). When compared with the idiopathic group, the patients with provoked infarction were older (69.8 vs. 57.9 years, p = 0.014) and had a higher rate of recurrence of arterial thrombosis during follow-up (18.8 vs. 0%, p = 0.028), but there were no differences in the rest of the baseline characteristics or in mortality rates. Six patients (10.2%) in the idiopathic group were diagnosed with atrial fibrillation during follow-up. Conclusions: Atrial fibrillation, both at diagnosis and at follow-up, is the most common identifiable cause of renal infarction; however, a significant number of patients are idiopathic, and these are younger, but they have a similar burden of cardiovascular disease and a lower risk of arterial recurrence.