Solitary Intestinal Fibromatosis with Perinatal Bowel Obstruction

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Abstract
Three newborn male infants presented with bowel obstruction in the first day of life and at surgery were found to have solitary tumors involving the small or large intestine. Histologic examination in each case showed a transmural infiltrative spindle cell lesion having the morphologic features of fibromatosis. Ultrastructural studies in one case revealed the tumor to be composed of myofibroblasts. The patients are all alive and well without recurrences 26 months to 10 years after surgery. Only 3 previous cases of solitary congenital fibromatosis of the intestinal tract have been reported. Some of the other congenital spindle cell tumors cited in the literature under various names have morphologic and biologic similarities to our cases and may in fact be examples of congenital fibromatosis. The appropriate treatment of this unusual lesion is local excision, and the prognosis is excellent.

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