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Identifying, Diagnosing, and Grading Malignant Peripheral Nerve Sheath Tumors in Genetically Engineered Mouse Models
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[Intranodal myofibroblastoma: a case report].

M I Santos1, C Salgado

  • 1Serviço de Pediatria, Hospital de São Teotónio, E.P.E. Viseu, Portugal. mines.santos82@gmail.com

Cirugia Pediatrica : Organo Oficial De La Sociedad Espanola De Cirugia Pediatrica
|November 2, 2012
PubMed
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Intranodal myofibroblastoma, a rare benign mesenchymal neoplasm, was diagnosed in a pediatric patient. This case highlights the importance of immunohistochemical studies for accurate diagnosis and management of soft tissue tumors.

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Area of Science:

  • Oncology
  • Pathology
  • Pediatric Oncology

Background:

  • Myofibroblastomas are a diverse group of myofibroblastic tumors.
  • These tumors can exhibit malignant or benign behavior.
  • Clinically, they manifest as painless, growing soft tissue masses.

Observation:

  • A 12-year-old female presented with a year-long history of a painless inguinal mass.
  • Histological examination revealed spindle cell proliferation within lymph nodes.
  • Immunohistochemistry showed positivity for vimentin, CD34, and smooth muscle actin.

Findings:

  • The patient was diagnosed with intranodal myofibroblastoma.
  • A local recurrence occurred two years post-excision, necessitating a second surgery.
  • No further recurrences were observed three years after the second intervention.

Implications:

  • Intranodal myofibroblastoma is a rare benign mesenchymal neoplasm.
  • This is the first reported pediatric case, expanding the known demographic.
  • Accurate diagnosis relies heavily on immunohistochemical analysis to differentiate from other soft tissue tumors.