Multi-disciplinary team meetings with specialist radiologists may improve pre-operative clinico-radiological diagnostic accuracy in patients requiring orbital biopsy and offer reciprocal educational opportunities.

BACKGROUND Accurate pre-operative diagnosis of orbital lesions supports appropriate prioritisation of patients into available theatre time. We examine the accuracy of pre-operative clinico-radiological diagnosis in a tertiary centre with weekly dedicated orbital clinics and associated multi-disciplinary team meetings. METHODS A retrospective case notes review was undertaken for all patients who had an orbital biopsy performed at Bristol Eye Hospital between 2007 and 2017. In this centre, pre-operative clinico-radiological differential diagnoses are discussed during multi-disciplinary team meetings including two orbital specialist ophthalmologists and a specialist neuro-radiologist. Clinico-radiological diagnoses were compared with histopathological outcomes. Subcategory analysis according to histopathological diagnosis was undertaken to look for trends. RESULTS 172 biopsies were taken from 156 patients, median age 59 years (range 3 months to 91 years). 60.9% of patient were females, with equal numbers of right and left-sided biopsies. 11 patients had inconclusive histopathology. 15 patients did not have a documented preoperative diagnosis or differential offered in available notes. 71 patients (49.0%) demonstrated an exact match between clinico-radiological and histopathological diagnosis, 93 (64.1%) demonstrated a category match (e.g. inflammatory, lymphoproliferative) and for 111 (76.6%), the histopathological diagnosis was considered within the list of proffered clinico-radiological differential diagnoses. CONCLUSIONS Accuracy of pre-operative diagnosis of orbital lesions undergoing biopsy was higher in our series than previously reported by Koukoulli et al. Specialist head and neck radiology input via regular orbital multi-disciplinary meetings might be reciprocally educational and explain this difference. The authors recommend all surgeons who perform orbital surgery should have access to such multi-disciplinary meetings.