Salivary Gland Choristoma (Heterotopic Salivary Gland Tissue) on the Anterior Chest Wall of a Newborn

The document reports a rare case of salivary gland choristoma (heterotopic salivary gland tissue) located on the anterior chest wall of a newborn girl, which is only the second known case of its kind. The infant, born at 39 + 2 weeks gestation, presented with a 2- to 3-mm exophytic papule at the suprasternal notch. An ultrasound did not reveal any internal abnormalities, and the mass was removed at 10 months of age. Histopathology confirmed the diagnosis of salivary gland choristoma. The discussion highlights that heterotopic salivary gland tissue can be found in various locations outside the major and minor salivary glands and that it is generally nonprogressive with little risk of malignant transformation. The case suggests an association with the precervical sinus that develops in the lower neck and migrates to the upper thoracic region during embryonic development. The authors emphasize the importance of distinguishing this condition from other anomalies and recommend biopsy and excision as first-line treatment, while also aiming to prevent unnecessary examinations or surgical explorations in newborns.