Systemic considerations in bilateral central retinal vein occlusion

Bilateral Central Retinal Vein Occlusion as a First Presentation of Multiple Myeloma: A Case Report

Introduction: Acute presentation of multiple myeloma in the emergency department (ED) is an uncommon yet life-threatening clinical entity. Case Report: A 42-year-old male presented to the ED with severe generalized fatigue and vision changes most notable in his left eye. Bilateral central retinal vein occlusion (CRVO) was diagnosed on dilated fundus exam in the ED. Conclusion: The most common cause of CRVO in adults over age 50 is vascular disease, but in younger adults, conditions of systemic inflammation or hyperviscosity must be considered. Diagnosis of CRVO requires emergent ophthalmology consultation and further treatment with phototherapy, steroids, and potentially anti-vascular endothelial growth factor. Ultimately, patients require hematology/oncology and ongoing management of acute hyperviscosity syndrome. We present this case to increase awareness surrounding this diagnosis among emergency physicians. Multiple myeloma should be considered in young patients who present to the ED with bilateral CRVO, acute renal failure, and symptomatic anemia.

Bilateral Central Retinal Vein Occlusion and Stevens-Johnson Syndrome Associated with Coronavirus-19: A Case Report

Purpose

To report a case of bilateral central retinal vein occlusion (CRVO) associated with coronavirus-19 (COVID-19) infection.

Methods

A 43-year-old man presented to the emergency department with flu-like symptoms, severe erythema, a rash on his face, and respiratory distress. He was admitted to the intensive care unit, and the reverse transcriptase-polymerase chain reaction test was positive for the severe acute respiratory syndrome coronavirus-2 virus. The routine blood work was unremarkable. The dermatologist noted positive Nikolsky's sign, and the patient was diagnosed with Stevens-Johnson syndrome (SJS), which affected 18% of his body and was later confirmed by skin biopsy. Later, he reported worsening vision.

Results

Ophthalmic examination and fundus fluorescein angiography showed bilateral CRVO. Despite best medical efforts, including treatment with systemic dexamethasone and remdesivir, the patient died on the 6 days of his hospitalization.

Conclusion

This was a rare bilateral CRVO and SJS case in a young patient, probably caused by the COVID-19 infection.

Hyperviscosity retinopathy as the initial presentation of aggressive multiple myeloma

Multiple myeloma (MM) is a hematologic malignancy resulting from the uncontrolled proliferation of neoplastic plasma cells and the excessive production of monoclonal immunoglobulins, both of which may lead to hyperviscosity retinopathy. Here, we present a 56-year-old male who had progressive painless loss of vision for 1 month. Ophthalmic examination revealed hyperviscosity retinopathy with bilateral central retinal vein occlusion-like appearance. Hematologic assessment revealed immunoglobulin A MM. Although the patient was treated with chemotherapy and autologous stem cell transplantation soon after referral, he did not survive due to the aggressive course of the disease. We highlight the importance of the ophthalmic presentation of MM. Early recognition and referral to an oncologist can lead to timely diagnosis and appropriate management.

Incidence of retinal vein occlusion with long-term exposure to ambient air pollution

This study aimed to investigate whether long-term exposure to airborne hydrocarbons, including volatile organic compounds, increases the risk of developing retinal vein occlusion (RVO) among the population of Taiwan. A retrospective cohort study involving 855,297 people was conducted. Cox proportional hazards regression analysis fitted the multiple pollutant models for two targeted pollutants, including total hydrocarbons (THC), nonmethane hydrocarbons (NMHC) were used, and the risk of RVO was estimated. The chi-squared test and one-way analysis of variance were used to test differences in demographics and comorbidity distribution among tertiles of the targeted pollutants. Before controlling for multiple pollutants, hazard ratios for the overall population were 19.88 (95% CI: 17.56-22.50) at 0.51-ppm increases in THC and 4.33 (95% CI: 3.97-4.73) at 0.27-ppm increases in NMHC. The highest adjusted hazard ratios for different multiple pollutant models of each targeted pollutant were statistically significant (all p values were ≤0.05) for all patients at 29.67 (95% CI: 25.57-34.42) for THC and 16.24 (95% CI: 14.14-18.65) for NMHC. Our findings suggest that long-term exposure to THC and NMHC contribute to RVO development.

[Acute, bilateral visual loss in a patient with IgA glomerulonephritis]

We report on a 30-year-old male patient presenting with acute bilateral loss of vision. Fundus examination showed bilateral retinal hemorrhages, cotton-wool spots, macular edema and optic disk hyperemia. The blood pressure was elevated. The patient was referred to the emergency department with the diagnosis of severe stage IV hypertensive retinopathy. Further examination revealed a previously unknown IgA glomerulonephritis with terminal renal failure and secondary blood pressure derailment. Hypertensive retinopathy can be a first sign of acute renal failure. In cases of hypertensive retinopathy the differential diagnosis including systematic screening is of utmost importance.

Bilateral BRVO in a patient with recurrent prostate cancer

Bilateral cases of branch retinal vein occlusions (BRVO) are infrequent and often related to systemic disease. A 72-year-old man with biochemical recurrence of prostate cancer was referred for decreased vision in his left eye. Fundus examination and fluorescein angiography disclosed bilateral BRVO with patches of peripheral non-perfusion and macular oedema in the left eye. A systemic work up revealed elevated fibrinogen and reduced free protein S antigen, consistent with an underlying hypercoagulable state. Cancer is a well-known cause of hypercoagulability. We report the first case of bilateral BRVO related to biochemical recurrence of prostate cancer and a proven coagulation derangement.

Thrombophilic risk factors in different types of retinal vein occlusion in Tunisian patients

BACKGROUND

Retinal vein occlusion (RVO) is the second most common cause of vision loss because of retinal vascular disease. There are 2 types of RVO: branch retinal vein occlusion (BRVO) and central retinal vein occlusion (CRVO). The pathogenesis of RVO is multifactorial. The role of factor V Leiden (FVL) and prothrombin mutations was examined in patients with CRVO and BRVO.

METHODS

FVL and prothrombin were investigated by extracting DNA of 88 patients with RVO. Sixteen of the patients were diagnosed with CRVO, 4 with hemispheric retinal vein occlusion, and 68 with BRVO. The genotyping was performed by polymerase chain reaction-restriction fragment length polymorphism.

RESULTS

Significant differences were found in the frequencies of the genotypes for both the FVL (G1691A) (P<10(-3), odds ratio [OR]=17.4, confidence interval [CI]=6.20-59) and prothrombin (G20210A) (P=.007, OR=5.11, CI=1.30-29) polymorphisms between RVO patients and healthy controls. Additionally, the frequency of the GA genotype for the G1691A polymorphism was significantly higher among the patients in a subset of BRVO compared with controls (P<10(-3), OR=21.4, CI=7.34-74.2). However, no statistically significant differences were found in the frequencies of the prothrombin G20210A polymorphism between the BRVO group and healthy controls (P=.09, OR=3.13, CI=64-19.9). The frequency of both G1691A and G20210A genotypes among the patients of a CRVO subgroup was significantly higher compared with controls (P<10(-3), OR=11.4, CI=2.94-44.2; P=.007, OR=10.8, CI=2.15-54.1, respectively), suggesting an association between these polymorphisms and CRVO.

CONCLUSIONS

Large study would be required to understand completely the contribution of these markers in the risk of all types of RVO.

Homocysteine induces energy imbalance in rat skeletal muscle: is creatine a protector?

Homocystinuria is a neurometabolic disease caused by a severe deficiency of cystathionine beta-synthase activity, resulting in severe hyperhomocysteinemia. Affected patients present several symptoms including a variable degree of motor dysfunction. In this study, we investigated the effect of chronic hyperhomocysteinemia on the cell viability of the mitochondrion, as well as on some parameters of energy metabolism, such as glucose oxidation and activities of pyruvate kinase, citrate synthase, isocitrate dehydrogenase, malate dehydrogenase, respiratory chain complexes and creatine kinase in gastrocnemius rat skeletal muscle. We also evaluated the effect of creatine on biochemical alterations elicited by hyperhomocysteinemia. Wistar rats received daily subcutaneous injections of homocysteine (0.3-0.6 µmol/g body weight) and/or creatine (50 mg/kg body weight) from the 6th to the 28th days of age. The animals were decapitated 12 h after the last injection. Homocysteine decreased the cell viability of the mitochondrion and the activities of pyruvate kinase and creatine kinase. Succinate dehydrogenase was increased other evaluated parameters were not changed by this amino acid. Creatine, when combined with homocysteine, prevented or caused a synergistic effect on some changes provoked by this amino acid. Creatine per se or creatine plus homocysteine altered glucose oxidation. These findings provide insights into the mechanisms by which homocysteine exerts its effects on skeletal muscle function, more studies are needed to elucidate them. Although creatine prevents some alterations caused by homocysteine, it should be used with caution, mainly in healthy individuals because it could change the homeostasis of normal physiological functions.

Catastrophic antiphospholipid antibody syndrome and cocaine abuse associated with bilateral retinal vascular occlusions

PURPOSE

To describe a case of bilateral central retinal vein occlusion and central retinal artery occlusion associated with antiphospholipid antibody syndrome and cocaine abuse.

METHODS

A single case report of a 44-year-old woman with a history of cocaine abuse, vasculitis, and 3 spontaneous abortions who developed painless complete loss of vision in both eyes concurrently with progressive motor and sensory polyneuropathy. The patient underwent an extensive laboratory, radiographic, ophthalmologic, and pathologic workup.

RESULTS

Diagnosis of catastrophic antiphospholipid antibody syndrome was made based on established clinical and laboratory criteria, including a positive Russell's viper venom test, history of three spontaneous abortions and evidence of microvascular and macrovascular venous occlusions, and multiorgan failure. Urine toxicology screen was positive for cocaine metabolites. Her clinical course was remarkable for progressive mononeuritis multiplex and quadriplegia. She had no light perception on presentation, and fundus examination revealed extensive preretinal, intraretinal, and subretinal hemorrhages. Fluorescein angiography revealed complete occlusion of central retinal arteriolar and venular flow and retinal hemorrhages in both eyes.

CONCLUSION

Bilateral central retinal vein occlusion and central retinal artery occlusion have been rarely reported in the literature and are often associated with underlying thrombotic risk factors, such as antiphospholipid antibody syndrome. Workup for underlying hypercoagulability and/or cocaine use should be considered in atypical and bilateral cases of central vein or artery occlusion. In this case, bilateral central retinal artery and vein occlusions developed as manifestations of catastrophic antiphospholipid antibody syndrome, which has not been previously reported.