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Mesenteric inflammatory myofibroblastic tumors.

Poras Chaudhary1

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Summary
This summary is machine-generated.

Inflammatory myofibroblastic tumors (IMTs) are rare neoplastic lesions. Complete surgical resection is the primary treatment, with re-excision for recurrences, and ALK inhibitors showing promise for ALK-positive cases.

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ALK rearrangementsKeywords Inflammatory myofibroblastic tumorsdifficult diagnosissurgery

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Area of Science:

  • Oncology
  • Pathology

Background:

  • Inflammatory myofibroblastic tumors (IMTs), previously considered reactive, are now recognized as neoplastic mesenchymal proliferations.
  • IMTs are characterized by myofibroblastic spindle cells and significant inflammatory infiltration, including lymphocytes, plasma cells, and eosinophils.
  • These uncommon tumors can arise anywhere, frequently occurring in the lung, mesentery, and omentum, often presenting as abdominal masses or causing intestinal obstruction.

Approach:

  • This review synthesizes current knowledge on IMTs by examining available literature.
  • Histopathological features, including cellularity and inflammatory patterns, are discussed.
  • Diagnostic markers such as anaplastic lymphoma kinase (ALK) rearrangements and specific immunoreactivity (ALK1, p80) are highlighted.

Key Points:

  • IMTs exhibit diverse histologic features and can be multicentric, with a high propensity for local recurrence and rare metastasis.
  • No specific imaging findings definitively distinguish IMTs from other mesenteric masses due to their rarity.
  • Anaplastic lymphoma kinase (ALK) rearrangements are present in 33-67% of IMTs, correlating with treatment response.

Conclusions:

  • Complete surgical resection remains the gold standard treatment for IMTs.
  • Management of local recurrences typically involves re-excision.
  • ALK-positive IMTs demonstrate a favorable response to ALK inhibitors, offering a targeted therapeutic option.