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Pulmonary agenesis is the complete absence of lung tissue, including bronchial tree, lung parenchyma, and supporting vasculatures. [7] The only remaining part is rudimentary bronchus. [ 7 ] Hence, the affected areas lose their function of gas exchange. [ 7 ]
Pneumonectomy refers to the removal of the lung on the side of pulmonary artery agenesis. In the absence of a pulmonary artery, the lung on the affected side is not involved in ventilation . Instead, it leads to symptoms such as hemoptysis, pulmonary hypertension and congestive heart failure. [ 11 ]
Extension into the maxillary alveolar process may cause the roots of the molars and even premolars to lie just beneath the floor of the sinus or even project through the floor and into the sinus; in such cases, the roots of the teeth are typically surrounded by a thin layer of bone, but may sometimes lie directly underneath the mucous membrane ...
The frontal sinuses are located in the frontal bone; the sphenoidal sinuses in the sphenoid bone; the maxillary sinuses in the maxilla; and the ethmoidal sinuses in the ethmoid bone. [2] [13] A narrow opening called a sinus ostium from each of the paranasal sinuses allows drainage into the nasal cavity. The maxillary sinus is the largest of the ...
Recent studies have classified two types of maxillary sinus septa: primary and secondary. Primary septa are those initially described by Underwood and that form as a result of the floor of the sinus sinking along with the roots of erupting teeth; these primary septa are thus generally found in the sinus corresponding to the space between teeth, as explained by Underwood.
Atelectasis is the partial collapse or closure of a lung resulting in reduced or absence in gas exchange. It is usually unilateral, affecting part or all of one lung. [2] It is a condition where the alveoli are deflated down to little or no volume, as distinct from pulmonary consolidation, in which they are filled with liquid.
In medicine, agenesis (/ eɪ ˈ dʒ ɛ n ə s ə s / [1]) refers to the failure of an organ to develop during embryonic growth and development due to the absence of primordial tissue. Many forms of agenesis are referred to by individual names, depending on the organ affected: Agenesis of the corpus callosum - failure of the Corpus callosum to ...
It then turns [1]: 616 to pass inferomedially [1]: 653–654 and anteriorly [1]: 699 while passing through the anterior wall of the maxillary sinus [1]: 616 (the canal is marked by a groove upon the internal surface of the anterior wall of the sinus [1]: 699 ).