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Rectal Inflammatory Myoglandular Polyp with Osseous Metaplasia in a Child

Suvradeep Mitra1, Mukund Sable1, Subrat Kumar Sahoo2

  • 1Pathology and Lab Medicine, All India Institute of Medical Sciences, Bhubaneswar, India.

Fetal and Pediatric Pathology
|August 11, 2020
PubMed

Insights

Inflammatory myoglandular polyp (IMGP) in a child showed rare osseous metaplasia. This finding suggests benign bone formation can occur within IMGP, expanding its known histopathological spectrum.

Area of Science:

  • Gastroenterology
  • Pediatric Pathology
  • Surgical Pathology

Background:

  • Inflammatory myoglandular polyp (IMGP) is a type of colorectal polyp.
  • IMGP shares features with juvenile polyps and Peutz-Jeghers polyps.
  • Osseous metaplasia is the formation of bone in soft tissue and can occur in various polyps.

Observation:

  • A 9-year-old female presented with hematochezia.
  • A rectal polyp was identified and surgically removed.
  • Histopathological examination revealed features of IMGP with coexisting stromal osseous metaplasia.

Findings:

  • The rectal polyp demonstrated the characteristic histological features of an inflammatory myoglandular polyp.
  • The polyp also exhibited benign osseous metaplasia within its stroma.
  • This represents a rare occurrence of osseous metaplasia in an IMGP.

Implications:

  • This case expands the known histopathological spectrum of IMGP.
  • It highlights that benign osseous metaplasia can be a feature of IMGP.
  • Awareness of this finding is important for accurate diagnosis and classification of colorectal polyps in pediatric patients.

Keywords:
Inflammatory myoglandular polypOsseous metaplasiachildhamartomatous polyprectal polyp

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