Intraosseous lipoma of mandible presenting as a swelling
A 15-year-old boy reported to our institution with a complaint of swelling in the right lower jaw of 2 years duration, associated with increasing difficulty in speech. Anamnesis failed to reveal any trauma to the site. General and extraoral examinations were within normal limits. Intraoral examination revealed a smooth, non tender, and bony hard, ovoid swelling of about 4 × 2.5 cm size, located towards the lingual aspect of mandible extending from 41 to 47 [].\nA mandibular occlusal radiograph revealed cortical expansion with hazy radiopacity on the lingual surface of mandible []. The associated teeth were found to be within normal limits. Excision of the lesion under local anesthesia was planned. The growth was bony hard, and it was easily malleted out.\nThe specimen was decalcified overnight in 8% nitric acid and routinely processed to obtain paraffin-embedded, 10 μ thick hematoxylin and eosin (H and E) stained slides. Microscopically, the tissue was composed of areas of mature adipocytes interspersed with few trabeculae of mature lamellated bone and prominent thin-walled, large caliber vascular spaces. The fat cells were without cellular atypia or mitotic figures []. The major part of the lesion was surrounded by a continuous layer of cortical bone, which appeared to be thinned out []. There was no evidence of a fibrous capsule around the lesion. Serial sections failed to reveal normal hematopoietic tissue.\nBased on these findings, a diagnosis of intraosseous lipoma was made. There was no evidence of recurrence at 1-year follow-up.