KEYWORDS ABSTRACTClinical pathology, Education, Laboratory medicine, Medical studentScan to discover online Background & Objective: Appropriate use of laboratory testing is essential for achieving safe and effective care to patient. Insufficient knowledge could lead to poor case management and increase the health care costs. It is believed that education on laboratory testing for undergraduate medical student is inadequate. This study was designed to evaluate the level of knowledge of 5 and 6 year undergraduate medical students in field of laboratory medicine.Methods: Totally, 59 questions including 8 basic questions concerning individual assessment of their knowledge and 51 objective questions focusing on various stages of test ordering and interpretation were asked.Results: Thirty seven undergraduate medical students at the level of internship participated. On average, 47.9% of students evaluated themselves as "weak" in 8 selfassessment questions. There was no significant difference between responders assessment on their own knowledge in various aspects of laboratory testing (P=0.184).In the objective questions regarding various stages of test ordering including preanalytic, analytic and post analytic phases,45.6%,51.9% and 50% correct answers were reported ,respectively. Comparison of the level of the knowledge of the students regarding various stages of pathology testing did not show significant difference (P=0.638). Conclusion:Prioritizing an effective teaching method of laboratory medicine to medical students on appropriate time should be considered in medical school curriculum for better clinical decision making and optimal modern medical care. Main Subjects: Clinical Pathology

Purpose To report a case of a grown Soemmering ring that manifested as an iris tumour 24 years after cataract surgery. Methods A case report. Results A 27-year-old white man was presented with a suspected iris tumour in his left eye. He had undergone lensectomy in both eyes without intraocular lens implantation 24 years ago. Last year, he was treated by topical anti-glaucoma medication for left eye intraocular pressure (IOP) rising. Six months later, his ophthalmologist found two separate iris bumps. The patient was referred to an ocular oncologist and was to be treated with plaque brachytherapy as iris melanoma, but he denied. Ultrasound biomicroscopy (UBM) of the left eye showed significant angle narrowing due to separate ovoid hyper echoic masses behind the iris, which was clearly separated from the ciliary body. Retained and growth lens material caused a Soemmering ring to enlarge, which was the reason for glaucoma and iris bumping. The patient has been followed for more than one year without any changes being observed. Conclusion An enlarged and grown Soemmering ring should be considered in the differential diagnosis of any iris and ciliary body tumour, especially in patients who have had cataract surgery.