Study of Morphological Variations of Fissures and Lobes of Lung

Abstract

Background: The lungs are the essential organs of respiration. Fissures are an integral part of human lung. The fissures in lung enhance uniform expansion. These fissures may be complete, incomplete or absent. A detailed knowledge of variations of classical and accessory fissures is necessary for proper radiological interpretation. It is a guide to cardiothoracic surgeons performing segmental lung resections, lobectomies to have an uncomplicated perioperative outcome. Considering the clinical and anatomical importance of this topic, the present study is undertaken. Aim of the study: The cadaveric study was done to note the morphological variation of the fissures of lung and compared it with previous studies. Results: In the present study among 40 adult human cadaveric lungs, the following observation was made; right sided lungs had incomplete oblique fissure in3 lungs, incomplete horizontal fissure in 10 lungs. Left sided adult lungs had incomplete oblique fissure in 7, absent oblique fissure-1, accessory fissure-3 lungs. Conclusion: Knowledge of normal and abnormal morphological variation is very important for the clinicians, radiologist and surgeons in order to avoid misinterpretation and misdiagnosing and preventing the untoward incidents.

Variations in human pulmonary fissures and lobes: a study conducted in nepalese cadavers

“…Cadavers are still the best means to study all the domains of anatomy. Various Researchers in different studies of lungs performed on cadavers have reported their findings time and again which is compared with the present study as shown in Tables 4 and 5 [ 2 9 15 16 17 18 19 20 21 22 23 24 25 26 27 ].…”

“…It is observed that absent horizontal fissure is commonly occurring variation as reported by many researchers ( Table 4 ). Only the study of Mamatha et al [ 27 ] did not show its appearance. Incidence of missing horizontal fissure in present study (13.04%) is less than some studies [ 2 9 15 17 19 25 26 ] but higher than other studies [ 16 18 20 21 22 23 24 ].…”

Variations in the Morphology of Human Lungs and its Clinical Implications

“…The presence of accessory fissures among right lungs is interestingly found to be high in the study by Prakash et al 9 (39%) when compared with studies by other authors, 5,8,[10][11][12] which vary from 3% to 17%. The presence of complete accessory fissures results in accessory lobes.…”

“…The prevalence of incomplete oblique fissure in the right-sided lungs is low when compared with that of the incomplete horizontal fissure, and this is seen in the present study (51%), followed by other studies. 5,8,9,11,12 However, according to Magadum et al, 10 the prevalence of incomplete oblique fissure was higher than that of the incomplete horizontal fissure.…”

Prevalence of incomplete interlobar fissures of the lung

“…Detailed autopsies were mostly performed on small numbers of lungs and the prevalence ranged from 7.1% to 46.7% (mean 21.5%), 5.6% to 39.3% (mean 24.6%), and 7.8% to 74% (mean 40.4%) for left oblique, right oblique, and horizontal fissures, respectively 2,3,7,[32][33][34][35][36][37][38][39][40][41] . In this summary, we intentionally ignored a paper by Dogan et al 40 (included in Table 1) because they assessed the incompleteness of fissures in routine forensic autopsies, leaving large parts of the lung uninvestigated.…”