Inflammatory myofibroblastic tumour of the colon: 2 case reports and a comprehensive review of the literature.

Purpose: Inflammatory myofibroblastic tumour (IMT), which is also named as plasma cell granuloma (PCG) or inflammatory pseudotumour (IPT), is a rare tumour which rarely develops in the colorectal region. We aimed to review all reported cases to draw attention about this rare tumour.

Methods: We present two new cases of colonic IMT with no recurrence during the follow-up period. We also reviewed previously reported colorectal IMT/IPT/PCG patients to investigate demographics, diagnosis and treatment modalities.

Results: A total of 60 patients which including our 2 patients and 58 patients from 42 published articles were analysed. Male/female ratio was 34/26. Mean age was found to be 31.84 ± 22.26 years (9 months-82 years). Abdominal pain (56.7%) and fever (23.3%) were the most common complaints in the first admission. Fifty-nine (98.3%) out of 60 patients underwent surgery. During follow-up, 7 (14.3%) patients developed a local recurrence.

Conclusion: IMT may occur at any age. IMT is considered to be a borderline tumour with the potential for recurrence or distant metastasis. Complete resection of the tumour is recommended for treatment. Long-time follow-up is necessary due to recurrence potential of the tumour even many years after complete surgical resection.

Trial Registration: The study follows the regulation of the Institutional Review Board for human research at Izmir Katip Celebi University Ataturk Training and Research Hospital. Written informed consents were obtained from the patients who participated in this study.