INTRODUCTION: Lungs are divided by fissures into lobes, these fissures in lung enhance uniform expansion, facilitates movements of lobes in relation to one another. Variations in lobes and fissures of lungs are clinically significant. Awareness of these variations is essential during radiological interpretation and guide to cardiothoracic performing segmental resections of lung.

AIMS & OBJECTIVE: To assess of variations in the fissures and lobar pattern of the lungs this is essential for proper identification of normal lung anatomy. To understand the variable appearance of fissures of lung on radiological examination and to identify the bronchopulmonary segments prior to lobectomies & surgical resections of involved segments.

MATERIALS AND METHODS: 50 lungs (25 right side lungs & 25 left side lungs) used during routine dissection for the medical undergraduates classes & from the Museum of the Department of Anatomy in the Saraswathi Institute of Medical Sciences, Pilkhuwa, Hapur were studied for the presence of normal fissures and its variations including number of fissures, accessory fissures and accessory lobes were noted and specimens were photographed.

RESULT: Among 50 adult lungs, 25 were right lung and 25 left lung 16% right adult lungs showed incomplete oblique fissure while no specimen showed absence of oblique fissure in right and left lung both. Left adult lungs showed higher incidences of incomplete oblique fissure than right lungs 20%.  Incomplete horizontal fissure is 12%: absence of horizontal fissure is 16% in right adult lung. Accessory fissure and accessory lobes is 8% in right and left lungs. 12% Horizontal fissure were found in left lungs so, 3 lobes were there in these left lungs.           

CONCLUSION: Comparison with other studies shows regional variations in morphological patterns of lung fissures and lobes, implying environmental and genetic factors in its development. Knowing the frequency of occurrence of a variant fissure can help the radiologist and clinician to make correct diagnosis, plan, execute, and modify a surgical procedure.