LAUSR

Address for Correspondence: Dr. Roma Rai, Graded Specialist, Department of Radiodiagnosis, INHS Patanjali, Karwar-581308, India. Mobile: 91-9923581505; Fax No: 08382-263612 E-Mail: [email protected] The lungs are divided into various lobes by the oblique fissure bilaterally and horizontal fissure on the right side. Apart from these common fissures, various accessory fissures are sometimes identified; namely the azygous fissure, superior and inferior accessory fissure on the right and minor (or horizontal) fissures on the left. These accessory fissures are usually detected as incidental findings in radiographs or Multi Detector Computed Tomography (MDCT) scan. Accessory fissures can act as an anatomic barrier to the spread of inflammatory or neoplastic disease and due to the variant anatomy, can mimic lesions. It is important to recognize the presence of accessory fissures, as they affect surgical planning of pulmonary lobectomy and segmentectomy. Occurrence of an accessory fissure in the right upper lobe other than due to the anomalous course of azygous vein is very rare. We report four cases of incidental detection of non-azygous accessory fissures in right upper lobe on MDCT Chest in patients referred for evaluation of unrelated diseases.In conclusion, knowledge of occurrence of uncommon accessory fissures is essential for superior diagnostic and surgical management.