cochlear canaliculus a small canal in the petrous part of the temporal bone that interconnects the scala tympani with the subarachnoid space; it houses the perilymphatic duct and a small vein. dental canaliculi minute channels in dentin, extending from the pulp cavity to the overlying cement and enamel.
Lung infarction. Lung infarction, death of one or more sections of lung tissue due to deprivation of an adequate blood supply. The section of dead tissue is called an infarct. The cessation or lessening of blood flow results ordinarily from an obstruction in a blood vessel that serves the lung.
Pulmonary infiltration can lead to lung fibrosis (i.e., the hardening and thickening of tissue) that can cause permanent scarring. Fibrosis tends to develop in areas where the infiltration lasts a long time or where it is especially dense. Fibrosis causes the lungs to stiffen, making it difficult to breathe. Unfortunately, fibrosis is irreversible. If extensive, it can cause severe dysfunction and, at its worse, can lead to heart failure. Although often asymptomatic, granulomas in the lung can cause assorted respiratory problems, including: 1  A persistent, dry cough. 2  Chest pain. 3  Hemoptysis (spitting up of blood from the lungs).