Cryo-assisted anterior approach for surgery of retroocular orbital tumours avoids the need for lateral or transcranial orbitotomy in most cases

Purpose: To describe and evaluate a cryo-assisted, minimally invasive, anterior approach for orbital tumour surgery. Methods: Retrospective, non-comparative, consecutive, interventional case series of 103 patients who were operated on by the same surgeon for retroocular orbital tumours over the last 16 years. Results: A cryo-assisted, minimally invasive, anterior approach was employed in 63 out of the 103 patients (61.2%). In 37 patients (35.9%), anterior orbitotomy without the use of cryoprobe was employed for biopsy or excision of small, anteriorly located lesions. Lateral orbitotomy was used in three patients (2.9%). In a subgroup of 61 patients with circumscribed lesions (mainly cavernous haemangiomas and schwannomas), cryoextraction was used in 51 (83.6%). None of the procedures required conversion to lateral orbitotomy and there were no intraoperative complications. Conclusion: In contrast to other reports on the treatment of orbital lesions, in the current case series surgery of most solid tumours and many other cystic or infiltrative lesions was achieved here via an anterior, cryo-assisted approach, and thus with minimal trauma to the orbit. This approach warrants more favourable consideration because the combination of the anterior approach with the use of cryoprobe and surgical microscope can yield successful results, even in patients with large or deeply located tumours - obviating in most of them the need for lateral or transcranial orbitotomies with bone flaps.