A Giant Mediastinal Lipoma: Case Report

Lipomas are well-circumscribed mesenchymal tumors that originate from adipose tissue. Mediastinal lipomas are so rare and usually discovered incidentaly and are reported to represent 1.6%-2.3% of all primary mediastinal tumors. Surgical excision is indicated for mediastinal lipoma only when causes pain or when the tumor compromises the adjuvant structures functions. We reported a 59 year old man presented with worsening of pneumonia episodes for last six months. Imaging techniques revealed pulmonary sequestration at lower lobe of the left lung and a giant lipoma at mediastinum which was found incidentaly. The patient underwent operation of pulmonary sequestration resection and frozen section biopsy were performed during the operation which were resulted as a benign tumor lipoma. As lipoma was so adherent to adjacent structures and was not indicated for resection, surgical attempt was not made and retrieved medical follow-up.