[Diffuse pulmonary carcinomatous lymphangitis. Study of respiratory function in 18 cases].
Respiratory function studies were carried out in 18 patients with diffuse and isolated pulmonary lymphangitis (LCP) diagnosed on radiological and cyto-histological grounds. Restrictive ventilatory defects were found in 17 out 18 cases CPT: 75,3% (DS = 5), CV: 56.7% (DS = 14,5). The Tiffeneau coefficient was less than 65% in 50% of cases but the DEM/CV was reduced in 77% of cases, evidence of the great frequency of airflow obstruction. The measure of the (formula; see text) was normal in 5 out of 17 cases, implying the absence of an alveolar neoplastic lesion or obliteration by arteritis or capillaritis in LCP. The alveolar-arterial oxygen gradient on hyperoxia was normal (less than 27 kPa) 14 times out of 18 and slightly increased in 4. Important hypoxaemia at rest was present 17 times out of 18; PaO2: 8 kPa (DS = 1). There was no patient with alveolar hyperventilation: PaCO2: 4.3 kPa (DS = 0.5). On exercise, hypoxaemia remained stable 4 times, improved 5 times and worsened 9 times. A pathophysiological interpretation was given for each disturbance of respiratory function. In conclusion, a characteristic respiratory function profile of LCP is proposed, with a restrictive ventilatory disturbance or moderate mixed picture, a DLCO/VA ratio generally normal, almost constant hypoxaemia at rest and improvement or worsening on exercise. CPT = Mean total lung capacity. CV = Mean vital capacity. DS = Standard deviation.
D000368:Aged; D005260:Female; D006801:Humans; D000860:Hypoxia / Q000503:physiopathology; D008205:Lymphangitis / Q000209:etiology / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D009361:Neoplasm Invasiveness; D010534:Peritoneal Neoplasms / Q000150:complications / Q000473:pathology / Q000503:physiopathology*; D012119:Respiration; D012129:Respiratory Function Tests; D012131:Respiratory Insufficiency / Q000503:physiopathology; D014797:Vital Capacity
Lymphangite carcinomateuse pulmonaire diffuse. Etude de la fonction respiratoire dans 18 cas.