Colonic Crohn Disease After Cardiac Transplantation: Case Report and Literature Review

Basiliximab therapy for immune-mediated bowel disease in a pediatric heart transplant patient

In pediatric patients who undergo heart transplantation, severe immune-mediated bowel disease has been reported. Management is complex, and there are little data discussing the use of basiliximab for immune-mediated bowel disease. This case report discusses a pediatric patient who developed immune-mediated bowel disease following heart transplantation and was successfully managed with basiliximab.

Gastrointestinal symptoms and endoscopy findings after pediatric solid organ transplantation: A case series

BACKGROUND

Gastrointestinal symptoms are common among solid organ transplant (SOT) recipients. Information about colonoscopy findings after pediatric SOT is limited. This retrospective study reports endoscopy findings in a nationwide pediatric transplant recipient cohort.

METHODS

All pediatric recipients (kidney, liver, or heart) transplanted between 2010 and 2020 at our institution (n = 193) who had undergone ileocolonoscopy and upper gastrointestinal endoscopy after SOT were enrolled. Sixteen patients were identified. A meticulous search on clinical data including transplantation, gastrointestinal symptoms, endoscopy findings, and follow-up data was performed.

RESULTS

Endoscopy was performed at a median of 2.6 years (0.4-13.3) after the first transplantation (median age at SOT 1.2 years). Gastrointestinal symptoms leading to endoscopy did not differ between the different transplant groups. The leading endoscopy indications were prolonged diarrhea and anemia. PTLD was found in 8 (50%) patients. Five were histologically early PTLD lesions and three were monomorphic large B-cell PTLDs (two EBV-positive and one EBV-negative), one having previously been diagnosed with autoimmune enteropathy. One patient had EBV enteritis. De novo inflammatory bowel disease was found in one patient, eosinophilic gastroenteritis in another, and in one patient with several episodes of watery diarrhea, the histological finding was mild non-specific colitis. In four patients, the endoscopy finding remained unclear and the symptoms were suspected to be caused by infectious agents or mycophenolate.

CONCLUSIONS

PTDL with various stages is a common finding after pediatric SOT in patients with gastrointestinal symptoms. Endoscopy should be considered in transplant recipients with prolonged diarrhea, anemia, and/or abdominal pain.

De Novo Inflammatory Bowel Disease Rarely Occurs During Posttransplant Immunosuppression

OBJECTIVES

De novo chronic idiopathic inflammatory bowel disease (CIIBD) is reported to occur at higher rates in posttransplant patients than that of the general population. The previous reports, however, included patients with primary sclerosing cholangitis (PSC), a known association with CIIBD. Hence, we investigated how often posttransplant de novo CIIBD occurs in the absence of PSC.

METHODS

We identified 185 posttransplant adults without a history of PSC or CIIBD, who had undergone colonoscopy between July 2013 and June 2020. Biopsies were reviewed and clinical data were gathered.

RESULTS

CIIBD-like colitis accounted for 1.1% (2/185) of our cohort. The 2 affected patients were already taking multiple immunosuppressive therapies. They were initially placed on standard CIIBD maintenance therapy, but then required escalation therapy. One patient had persistent active colitis despite escalation therapy, while the other subsequently had resolution of symptoms and developed quiescent disease.

CONCLUSIONS

The incidence of CIIBD-like colitis in our study population was lower than what has been previously described. Both patients had a poor response to standard CIIBD therapy, raising the question whether their diagnosis is truly de novo CIIBD or another immunologic process.

Rapid resolution of colitis related to immunosuppressive medication after infliximab administration

Immunosuppression is necessary after solid organ transplantation. The non-infectious side effects associated with many of these agents are not well understood. We report a case of colitis, most resembling inflammatory bowel disease, that persisted despite withdrawal of tacrolimus and mycophenolate mofetil and transition to alternative agents. The patient was treated for clostridium difficile without improvement. Endoscopic biopsies demonstrated non-specific inflammation without evidence of active infection. An extensive immunologic and oncologic workup was negative. Ultimately, we trialed the administration of infliximab, a monoclonal antibody that inhibits TNF-alpha receptors that is commonly used in the treatment of inflammatory bowel disease. With infliximab treatment, the patient experienced rapid resolution of his disease and has remained in remission.

Ulcerative Colitis Following Orthotopic Cardiac Transplantation

Inflammatory bowel disease following a solid organ transplantation while the patient is receiving immunosuppressive therapy is a rare phenomenon. Here we present a 48-year-old man who underwent cardiac transplantation 9 years earlier and was receiving cyclosporine as immunosuppressive therapy since then, presenting with complaints of rectorrhagia and diarrhea. In follow-up, he was diagnosed as having ulcerative colitis. We also reviewed the literature for similar cases, which yielded very few similar ones.