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June 1957

Congenital Myoblastoma of the Newborn

Author Affiliations

New Haven, Conn.
From the Department of Pediatrics, Yale University School of Medicine. Dr. Silver is now Professor of Pediatrics at the University of Colorado School of Medicine.

AMA Am J Dis Child. 1957;93(6):687-689. doi:10.1001/archpedi.1957.02060040689011

Congenital myoblastoma is a rare tumor which is present at birth and usually arises from the anterior alveolar ridge in the region of the future incisor teeth. It appears as a small smooth nodule, 1 to 3 cm. in diameter, which may be sessile or polypoid and have one or more lobes. The overlying epithelium is usually intact, although in some cases ulceration of the surface has occurred. The tumor mass is nontender, firm but not hard, and increases in size very slowly. Occasionally1 more than one distinct tumor may be found arising from the alveolar process. In 1955 Pleasants and Hinds2 reported a myoblastoma involving the gingiva of the maxilla and pointed out that only 12 cases in the newborn infant had been reported to that time and only 3 of them had involved the mandible. Although this tumor is fully discussed in the writings of dentistry

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