{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,23]],"date-time":"2026-05-23T08:06:21Z","timestamp":1779523581522,"version":"3.53.1"},"reference-count":21,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,5,23]],"date-time":"2026-05-23T00:00:00Z","timestamp":1779494400000},"content-version":"vor","delay-in-days":142,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Case Reports in Medicine"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:p>\n                    Posttransplant lymphoproliferative disorder (PTLD) is a rare yet potentially fatal complication following liver transplantation. This condition is usually associated with Epstein\u2013Barr virus (EBV) infection and profound immunosuppression. In this report, a young woman is introduced who had undergone liver transplantation due to autoimmune hepatitis and developed persistent diarrhea 3\u2009months after the transplantation. Simultaneously,\n                    <jats:italic>Cryptosporidium<\/jats:italic>\n                    infection was diagnosed as the cause of the diarrhea. However, due to the persistence of symptoms and lack of full recovery with initial treatment, further diagnostic evaluations were conducted. Tissue biopsy confirmed the presence of diffuse large B\u2010cell lymphoma (DLBCL) as an early\u2010onset PTLD. Following the diagnosis of PTLD, a reduction in the intensity of immunosuppression and initiation of specific treatment, including the administration of rituximab, were undertaken. Nevertheless, despite the therapeutic interventions, the patient died due to disease progression. This case underscores the necessity of considering PTLD as a differential diagnosis in liver transplant patients presenting with unusual symptoms such as persistent diarrhea\u2014even in the presence of a concurrent opportunistic infection like\n                    <jats:italic>Cryptosporidium<\/jats:italic>\n                    . Timely diagnosis and treatment of PTLD are crucial to improving the prognosis of these patients.\n                  <\/jats:p>","DOI":"10.1155\/carm\/5215414","type":"journal-article","created":{"date-parts":[[2026,5,23]],"date-time":"2026-05-23T07:51:16Z","timestamp":1779522676000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Early Posttransplant Lymphoproliferative Disorder and Cryptosporidiosis After Liver 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