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Abstract

The lung which is a vital organ of respiration normally has two lobes on the left and three on the right with the left lung having an oblique fissure and the right having both an oblique and a horizontal fissure. Although, many clinicians have observed variations in lobar pattern with the aid of CT scans, only few studies on gross anatomical specimens have been reported. In this report, we present variation in two right lungs as seen in the Gross Anatomy Laboratory of the College of Health Sciences, Niger Delta University NDU, Bayelsa State, Nigeria. The first has a horizontal fissure and an incomplete oblique fissure while the second has a complete oblique fissure with a complete absence of the horizontal fissure. The variation in fissures and lobes presented in this report are clinically important in appreciating lobar anatomy and for identifying broncho-pulmonary segments. Knowledge of anatomical variations is essential for interpreting radiological images, performing lobectomies and also for general knowledge to medical personnel.