A Case of Massive Hepatic Infarction in a Patient with HELLP Syndrome

Do Case Reports and Case Series Generate Clinical Discoveries About Preeclampsia? A Systematic Review

Background

Preeclampsia is a leading cause of maternal and perinatal mortality and morbidity. The management of preeclampsia has not changed much in more than two decades, and its aetiology is still not fully understood. Case reports and case series have traditionally been used to communicate new knowledge about existing conditions. Whether this is true for preeclampsia is not known.

Objective

To determine whether recent case reports or case series have generated new knowledge and clinical discoveries about preeclampsia.

Methods

A detailed search strategy was developed in consultation with a medical librarian. Two bibliographic databases were searched through Ovid: Embase and MEDLINE. We selected case reports or case series published between 2015 and 2020, comprising pregnant persons diagnosed with hypertensive disorders of pregnancy, including preeclampsia. Two reviewers independently screened all publications. One reviewer extracted data from included studies, while another conducted a quality check of extracted data. We developed a codebook to guide our data extraction and outcomes assessment. The quality of each report was determined based on Joanna Briggs Institute (JBI) critical appraisal checklist for case reports and case series.

Results

We included 104 case reports and three case series, together comprising 118 pregnancies. A severe presentation or complication of preeclampsia was reported in 81% of pregnancies, and 84% had a positive maternal outcome, free of death or persistent complications. Only 8% of the case reports were deemed to be of high quality, and 53.8% of moderate quality; none of the case series were of high quality. A total of 26 of the 107 publications (24.3%) included a novel clinical discovery as a central theme.

Conclusion

Over two-thirds of recent case reports and case series about preeclampsia do not appear to present new knowledge or discoveries about preeclampsia, and most are of low quality.

A Rare Case of HELLP Syndrome with Hematomas of Spleen and Liver, Eclampsia, Severe Hypertension and Prolonged Coagulopathy-A Case Report

The HELLP syndrome (hemolysis, liver damage and thrombocytopenia) is a rare (0.5−0.9%) but serious complication of pregnancy or puerperium associated with a higher risk of maternal and fetal mortality and morbidity. Liver and spleen hematomas rarely entangle (<2%) HELLP cases, but rupture of the hematomas presents an immediate threat to life. We present the history of a 35-year old pregnant woman (at the 31st week) admitted to our hospital due to the risk of premature delivery. On the first day, the patient did not report any complains, and the only abnormality was thrombocytopenia 106 G/L. However, within several hours, tests showed platelet levels of 40.0 G/L, LDH 2862.0 U/L and AST 2051.6 U/L, and the woman was diagnosed with severe HELLP syndrome, complicated by hematomas of the liver and spleen, seizures (eclampsia), severe arterial hypertension and coagulation disorders. The purpose of this article is to highlight the need for early investigation of the causes of thrombocytopenia and the differentiation of HELLP from other thrombotic microangiopathies (TMAs).

Hepatic Infarction in a Patient With Sickle Cell Trait Presenting With HELLP Syndrome

Hepatic infarction is uncommon due to the dual blood supply from the hepatic artery and portal vein. The majority of the cases are caused following liver transplant or hepatobiliary surgery, hepatic artery occlusion, or shock. Hepatic infarction is a rare complication of hemolysis, elevated liver enzymes, and low platelet (HELLP) syndrome. HELLP is an obstetrical emergency requiring prompt delivery. The presence of elevated liver enzymes, mainly alanine aminotransferase and aspartate aminotransferase in pre-eclampsia, should warrant diagnosis and treatment in the line of HELLP syndrome. Our patient with underlying sickle cell trait presented with features of HELLP syndrome in her third trimester of pregnancy. She underwent cesarean delivery on the same day of the presentation. The liver enzymes continued to rise following delivery and peaked on postoperative day two. Contrast computed tomography scan showed multifocal hepatic infarctions. Pre-eclampsia by itself is a state of impaired oxygenation and can lead to hepatic hypoperfusion, and appeared to be a clear contributor to the hepatic infarction in this case. However, this case also raises the question of whether the underlying sickle cell trait might have potentiated the hepatic infarction. Although sickle cell disease is well known to cause hepatic infarctions, it is unknown whether the sickle cell trait affects the liver to a similar extent as sickle cell disease. In addition, there have been case reports of sickle cell trait causing splenic infarcts and renal papillary necrosis, but it remains unclear if it can be directly associated with hepatic infarction.

Hepatic infarction, hematoma, and rupture in HELLP syndrome: support for a vasospastic hypothesis

Purpose: HELLP syndrome is a relatively uncommon pregnancy-related condition characterized by hemolysis, elevated liver function tests, and low platelets. It can be accompanied by life-threatening hepatic complications including hepatic infarction, hematoma formation, and hepatic rupture. HELLP syndrome occurs in approximately 0.2% of pregnancies. Major hepatic complications occur in less than 1% of HELLP patients suggesting an incidence of 1/50,000. The pathogenesis is incompletely understood and in particular, it is difficult to understand a disorder with both major thrombotic and bleeding manifestations.Methods: Literature review.Results: On the basis of reports in the published literature, and our own clinical experience, we suggest that vasospasm is one of the principal drivers with hepatic ischemia, infarction, and hemorrhage as secondary events. It is known that vasoactive substances are released by the failing placenta. We suggest these cause severe vasospasm, most likely affecting the small post-sinusoidal hepatic venules. This leads to patchy or confluent hepatic ischemia and/or necrosis with a resultant increase in circulating liver enzymes. Reperfusion is associated with a fall in platelet count and microvascular hemorrhage if the microvasculature is infarcted. Blood tracks to the subcapsular space causing hematoma formation. If the hematoma ruptures the patient presents with severe abdominal pain, intra-abdominal hemorrhage, and shock.Conclusions: We suggest that hepatic and other complications associated with HELLP syndrome including placental abruption, acute renal failure, and posterior reversible encephalopathy syndrome (PRES) may also be due to regional vasospasm.