This term baby was born with a left intranasal soft tissue mass affecting part of the left nostril and left alar region (Fig.1). The antenatal history was unremarkable. There was no respiratory compromise. There were no other congenital anomalies. Magnetic resonance imaging (MRI) scan showed an intranasal mass with associated partial agenesis of the corpus callosum and a callosal lipoma (Fig. 2). The lesion was found to be sessile, arising from the nasal septum at operation at four months of age. Histology confirmed it was a lipoma. At 18 months of age, he is developing normally with residual notching of his nostril.