Abstract
A 73-year-old woman was admitted to our hospital with a left axillary mass. A painless mass was located on the left lateral chest, but was recently enlarged. Chest computed tomography (CT) and magnetic resonance imaging (MRI) showed the hourglass shaped mass penetrating her left fourth intercostal muscle, and growing into the intra-and extra-thoracic areas, with a size of 65×50×40 mm. Her laboratory findings were almost within normal ranges. We performed a resection of the tumor and partial resection of the 4th and 5th ribs with the help of thoracoscopy. Pathological diagnosis was “intramuscular lipoma-infiltrating type, with no malignancy”. Assistance of the thoracoscopic approach was found to be useful for complete resection of the hourglass tumor found in the intra-and extra-thoracic areas.
