title: Perineal lipoma in a neonate.
abstract: Although lipoma is a subcutaneous tumor most commonly found on the trunk in adults, it is very rare in neonates. The histopathological findings show an encapsulated tumor containing normal fat cells. We report a 3-month-old female newborn with lipoma in the perineal region. The tumor was 4 cm in diameter, which histopathologically showed non-encapsulated lobules composed of fat cells without cellular atypia. There were no genital abnormalities. The tumor was easily removed while the patient was under general anesthesia.
authors.affiliation: Department of Dermatology and Biomolecular Sensing, Yamaguchi University School of Medicine, 1-1-1 Minami-Kogushi, Ube 755-8505, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Ogasawara
authors.forename: M
authors.initials: M
authors.lastname: Ichimiya
authors.forename: S
authors.initials: S
authors.lastname: Nomura
authors.forename: M
authors.initials: M
authors.lastname: Muto
mesh_terms: D001005:Anus Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008067:Lipoma / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery