ArticleJournal of the anus, rectum and colon2022
Peritoneal Recurrence of Cecal Cancer with Specific Imaging Findings and Shrinkage after Treatment with Pembrolizumab.
Article in Journal of the anus, rectum and colon, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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9 authors at 1 institution in 1 country.
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Abstract
Pembrolizumab is one of the treatment options for treatment-refractory unresectable advanced or metastatic colorectal cancer with microsatellite instability-high (MSI-H) or deficiencies in DNA mismatch repair (dMMR). Herein, we report a case in which a recurrent cecal cancer lesion showed specific imaging findings and local inflammatory findings during treatment with pembrolizumab, followed by marked shrinkage. The patient was an 80-year-old woman. Postoperative peritoneal recurrence of cecal cancer of approximately 7 cm in size was observed. The patient had MSI-H and was treated with pembrolizumab. After five courses of treatment, the patient presented to our hospital with a chief complaint of abdominal pain. A blood test showed a strong inflammatory reaction, and computed tomography (CT) showed diffuse low-density area in the tumor. Under the suspicion of an abscess, conservative treatment was initiated and the patient quickly recovered. A CT at 1 month showed a marked reduction in size at the same site, and a CT at 3 months showed that the recurrent foci had almost disappeared. The inflammatory reaction before shrinkage in this case may have been caused by tumor immune response to pembrolizumab.
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