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Neuromuscular choristoma

A Mitchell¹, B W Scheithauer, H Ostertag

¹Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota 55905, USA.

American Journal of Clinical Pathology

|April 1, 1995

Summary

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Neuromuscular choristomas are rare tumors typically found in children. This case highlights an unusual presentation with post-resection growth, revealing a distinct fibromatosis requiring aggressive treatment.

Area of Science:

Pathology
Oncology

Background:

Neuromuscular choristomas are rare benign tumors, with only 13 cases previously reported.
These lesions typically occur in the first decade of life, often associated with large nerves.

Observation:

The authors present a rare case of neuromuscular choristoma with atypical growth post-incomplete resection.
Subsequent re-excision revealed a fibromatosis, distinct from the original choristoma.

Findings:

The fibromatosis recurred despite wide excision, necessitating a forequarter amputation.
This case underscores the importance of accurate histopathological diagnosis and complete tumor removal.

Implications:

The study reviews histogenesis theories and clinicopathologic features of neuromuscular choristomas.

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It clarifies the distinction between neuromuscular choristoma and other nerve sheath tumors, like the benign Triton tumor.