Malignant peripheral nerve sheath tumors (malignant schwannomas) in children

J. M. Meis, F. M. Enzinger, K. L. Martz, J. A. Neal

Research output: Contribution to journalArticle

126 Citations (Scopus)

Abstract

We studied the clinical and pathologic features of 78 malignant peripheral nerve sheath tumors in children ≤15 years of age. There were 42 boys and 36 girls, with a median age of 10 years. The majority of the tumors (42, or 54%) were central or axial in location; the rest were peripheral. Sixteen patients (21%) had a history of von Recklinghausen's disease. Fourteen (18%) had a malignant peripheral nerve sheath tumor arising in a nerve trunk or a neurofibroma and were unassociated with von Recklinghausen's disease. Patients typically presented with a painful mass of variable duration. Tumors ranged from 2 to 33 cm (median, 7.5 cm) and demonstrated a wide histologic spectrum that included spindled, epithelioid, and primitive neuroepithelial- like cells as well as heterologous elements (11). Immunohistochemical staining revealed S-100 protein in 28 of 50 cases (56%) as well as vimentin (13 of 21 cases, or 62%), Leu 7 (22 of 49 cases, or 45%), actin (eight of 20 cases, or 40%), and keratin (seven of 27 cases, or 26%). Survival status was known for 57 patients (73%). Kaplan-Meier estimates revealed a median survival of 45 months. Half of the patients had local recurrences at 12 months, and half had metastases at 24 months, most commonly to lungs, followed by lymph nodes, liver, bone, soft tissue, and brain. Age ≥7 years, male sex, presence of von Recklinghausen's disease, central location, larger tumor size, and tumors with ≥25% necrosis were found to be potentially significant adverse prognostic indicators by univariate analysis. Multivariate analysis revealed that larger tumor size, age ≥7 years, tumor necrosis ≥25%, and von Recklinghausen's disease to be independent adverse prognostic factors.

Original languageEnglish (US)
Pages (from-to)694-707
Number of pages14
JournalAmerican Journal of Surgical Pathology
Volume16
Issue number7
DOIs
StatePublished - Jan 1 1992

Fingerprint

Neurilemmoma
Neurofibromatosis 1
Neoplasms
Necrosis
Neuroepithelial Cells
Neurofibroma
Survival
S100 Proteins
Kaplan-Meier Estimate
Vimentin
Keratins
Actins
Multivariate Analysis
Lymph Nodes
Staining and Labeling
Neoplasm Metastasis
Bone and Bones
Recurrence
Lung
Liver

Keywords

  • Children
  • Malignant peripheral nerve sheath tumor
  • Malignant schwannoma
  • Nerve
  • Neurofibrosarcoma

ASJC Scopus subject areas

  • Anatomy
  • Surgery
  • Pathology and Forensic Medicine

Cite this

Malignant peripheral nerve sheath tumors (malignant schwannomas) in children. / Meis, J. M.; Enzinger, F. M.; Martz, K. L.; Neal, J. A.

In: American Journal of Surgical Pathology, Vol. 16, No. 7, 01.01.1992, p. 694-707.

Research output: Contribution to journalArticle

Meis, J. M. ; Enzinger, F. M. ; Martz, K. L. ; Neal, J. A. / Malignant peripheral nerve sheath tumors (malignant schwannomas) in children. In: American Journal of Surgical Pathology. 1992 ; Vol. 16, No. 7. pp. 694-707.
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