Osseous metaplasia in a recurrent symptomatic rectal lesion: a rare occurrence

Osseous metaplasia in a rectal polyp

Rectal polyps are finger-like projections of the mucosal surface that generally present with complaints of bleeding or mass per rectum. Polyps are classified histopathologically as neoplastic and non-neoplastic. Here, we present one such rare case of a middle-childhood boy who presented with complaints of bleeding per-rectum and revealed a 1.5 cm long rectal polyp. Histopathological examination revealed an osseous change in the rectal polyp. A detailed literature review of reported cases of benign rectal polyps with osseous metaplasia was conducted and consolidated all postulated theories of pathogenesis. This case report shows an interesting incidental finding of osseous metaplasia of the rectal polyp.

Rectal Inflammatory Myoglandular Polyp with Osseous Metaplasia in a Child

Background: Inflammatory myoglandular polyp (IMGP) combines the histopathological features of juvenile polyp and Peutz-Jegher's polyp. Osseous metaplasia can be occasionally seen in various benign, adenomatous, and malignant polyps. Case report: A nine-year-old girl with hematochezia had a rectal polyp with histological features of IMGP with additional stromal osseous metaplasia. Conclusion: Benign osseous metaplasia can be found in IMGP.