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Acute Abdomen with Ileus: A Heralding Presentation of Neuroleptic Malignant Syndrome.

ABSTRACT: The pathophysiology of neuroleptic malignant syndrome (NMS) with use of psychotropic drugs is still unclear. Although a rare event with an incidence of 0.02-3.2%, when not promptly recognized and managed, it carries a high mortality (10-20%) and morbidity rate. Presentation can be either typical, with muscle rigidity and hyperpyrexia, or atypical, the latter posing diagnostic and early management challenges in clinical practice. Our patient presented with delayed fever and ileus, making early diagnosis difficult. We propose that NMS be considered an alternate diagnosis in patients using psychotropic medications and manifest ileus and delayed fever, especially after other differentials have been excluded.

SUBMITTER: Chime C

PROVIDER: S-EPMC6180277 | biostudies-other | 2018 Sep-Dec

REPOSITORIES: biostudies-other

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Project description:BackgroundNeuroleptic malignant syndrome (NMS) is a rare, severe, idiosyncratic adverse reaction to antipsychotics. Second-generation antipsychotics (SGAs) were originally assumed to be free from the risk of causing NMS, however several cases of NMS induced by SGAs (SGA-NMS) have been reported.ObjectivesThe aim of this study was to systematically review available studies and case reports on SGA-NMS and compare the presentation of NMS induced by different SGAs.Data sourcesCitations were retrieved from PubMed up to November 2013, and from reference lists of relevant citations.Study eligibility criteriaEligibility criteria included (a) primary studies reporting data on NMS, with at least 50 % of the sample receiving SGAs; or (b) case reports and case reviews reporting on NMS induced by SGA monotherapy, excluding those due to antipsychotic withdrawal.Study appraisal and synthesis methodsA standardized method for data extraction and coding was developed for the analysis of eligible case reports.ResultsSix primary studies and 186 individual cases of NMS induced by SGAs were included. Primary studies suggest that SGA-NMS is characterized by lower incidence, lower clinical severity, and less frequent lethal outcome than NMS induced by first-generation antipsychotics. Systematic analysis of case reports suggests that even the most recently marketed antipsychotics are not free from the risk of inducing NMS. Furthermore, clozapine-, aripiprazole- and amisulpride-induced NMS can present with atypical features more frequently than other SGA-NMS, i.e. displaying less intense extrapyramidal symptoms or high fever.LimitationsCase reports report non-systematic data, therefore analyses may be subject to bias.Conclusions and implications of key findingsClinicians should be aware that NMS is virtually associated with all antipsychotics, including those most recently marketed. Although apparently less severe than NMS induced by older antipsychotics, SGA-NMS still represent a relevant clinical issue.

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Acute Abdomen with Ileus: A Heralding Presentation of Neuroleptic Malignant Syndrome.

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