先天性粒细胞龈瘤是一良性肿瘤,由于它仅见于新生婴儿,故也称为新生儿先天性龈瘤。自1871年首次报导到1972年共有113例。此瘤发生于齿槽粘膜,有蒂,表面光滑,偶见分叶,其大小可从数毫米到9公分直径。上颌发病4倍于下颌,女性10倍于男性。作者报告1例新生女孩,因上颌前份有一带蒂的巨大肿瘤来就诊。检查:包块中等硬度,大小4×3.5×2公分,色微红,表面部份溃烂。初诊为先天性粒细胞龈瘤。在上颌唇沟部浸润麻醉后切除肿瘤。肉眼观察为4×3.5×2公分大小,呈粉红色软组织肿块,有0.3×0.3×0.2公分的蒂,切面呈褐白色,韧度如橡皮。镜检,肿瘤无包膜,覆盖之上 Congenital granulocytic neoplasia is a benign tumor. Because it is only found in newborn infants, it is also called neonatal congenital neoplasm. A total of 113 cases were reported from 1871 to 1972. This tumor occurs in the alveolar mucosa, pedicle, smooth surface, occasionally lobulated, its size can be from a few millimeters to 9 cm in diameter. The maxillary disease was 4 times higher than the lower jaw, and the female 10 times more likely than the male. The authors report a case of a newborn girl with a large pedunculated tumor in front of the maxilla. Inspection: The block is of medium hardness, 4×3.5×2 cm in size, reddish color, and surface ulceration. The first diagnosis was congenital granuloma. The tumor was removed after anesthetizing the maxillary labial sulcus. The naked eye was observed to be 4 × 3.5 × 2 cm in size, showing a pink soft tissue mass with 0.3 × 0.3 × 0.2 cm pedicles. The cut surface was brownish white and the toughness was rubbery. Microscopic examination, tumor without capsule, covering