Cytological identification of Blastocystis hominis in the ascites of a patient with rectal carcinoma: a case report

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Udgivet i:Frontiers in Medicine vol. 12 (Mar 2025), p. 1539661-1539666
Hovedforfatter: Lin, Qian
Andre forfattere: Huang, Jun, Chen, Yuanyuan, Wu, Xiaoli, Ma, Yuhua, Yang, Qing, Long, Pan, Chen, Xin
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Frontiers Media SA
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024 7 |a 10.3389/fmed.2025.1539661  |2 doi 
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100 1 |a Lin, Qian  |u Department of Laboratory Medicine, Affiliated Hospital of Southwest Jiaotong University, The Third People’s Hospital of Chengdu, Chengdu, Sichuan, China 
245 1 |a Cytological identification of Blastocystis hominis in the ascites of a patient with rectal carcinoma: a case report 
260 |b Frontiers Media SA  |c Mar 2025 
513 |a Report 
520 3 |a IntroductionBlastocystis hominis ( B. hominis ), a protozoan parasite often found in the human intestinal tract, is typically identified through fecal examination. Its presence in ascitic fluid is quite uncommon, making such a detection significant in the context of medical diagnosis.Case presentationIn this case report, we describe a 53-year-old female patient who presented with a 6-month history of recurrent diarrhea and fecal incontinence subsequent to the diagnosis of rectal signet ring cell carcinoma. The patient was discovered to have a severe abdominal infection, with B. hominis identified in both the abdominal cavity and the intestinal tract. Marked improvement in diarrheal symptoms was achieved following peritoneal lavage with metronidazole.ConclusionThis case underscores the significance of detecting B. hominis infection in the ascitic fluid of a patient afflicted with rectal signet ring cell carcinoma. B. hominis , a prevalent opportunistic pathogen, often exploits the compromised immune states and nutritional deficiencies prevalent in cancer patients, rendering them more susceptible to such infections. It is imperative to enhance diagnostic accuracy and mitigate the risk of misdiagnosis to subsequently improve the clinical outcomes and overall quality of life for individuals battling cancer. 
653 |a Infections 
653 |a Patients 
653 |a Metastasis 
653 |a Ascites 
653 |a Diarrhea 
653 |a Cancer therapies 
653 |a Lymphatic system 
653 |a Biopsy 
653 |a Laboratories 
653 |a Abdomen 
653 |a E coli 
653 |a Case reports 
653 |a Colorectal cancer 
653 |a Tumors 
700 1 |a Huang, Jun  |u Department of Laboratory Medicine, Affiliated Hospital of Southwest Jiaotong University, The Third People’s Hospital of Chengdu, Chengdu, Sichuan, China 
700 1 |a Chen, Yuanyuan  |u Department of Laboratory Medicine, Affiliated Hospital of Southwest Jiaotong University, The Third People’s Hospital of Chengdu, Chengdu, Sichuan, China 
700 1 |a Wu, Xiaoli  |u Department of Laboratory Medicine, Affiliated Hospital of Southwest Jiaotong University, The Third People’s Hospital of Chengdu, Chengdu, Sichuan, China 
700 1 |a Ma, Yuhua  |u Department of Laboratory Medicine, Affiliated Hospital of Southwest Jiaotong University, The Third People’s Hospital of Chengdu, Chengdu, Sichuan, China 
700 1 |a Yang, Qing  |u Department of Laboratory Medicine, Affiliated Hospital of Southwest Jiaotong University, The Third People’s Hospital of Chengdu, Chengdu, Sichuan, China 
700 1 |a Long, Pan  |u Department of Laboratory Medicine, Affiliated Hospital of Southwest Jiaotong University, The Third People’s Hospital of Chengdu, Chengdu, Sichuan, China, Department of Ophthalmology, General Hospital of Western Theater Command, Chengdu, China 
700 1 |a Chen, Xin  |u Department of Laboratory Medicine, Affiliated Hospital of Southwest Jiaotong University, The Third People’s Hospital of Chengdu, Chengdu, Sichuan, China 
773 0 |t Frontiers in Medicine  |g vol. 12 (Mar 2025), p. 1539661-1539666 
786 0 |d ProQuest  |t Health & Medical Collection 
856 4 1 |3 Citation/Abstract  |u https://www.proquest.com/docview/3270739577/abstract/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch 
856 4 0 |3 Full Text  |u https://www.proquest.com/docview/3270739577/fulltext/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch 
856 4 0 |3 Full Text - PDF  |u https://www.proquest.com/docview/3270739577/fulltextPDF/embedded/7BTGNMKEMPT1V9Z2?source=fedsrch