Pulmonary Large Cell Neuroendocrine Carcinoma Associated With Lambert-Eaton Syndrome.

Lambert-Eaton syndrome is a rare paraneoplastic disorder of the neuromuscular junction, characterized by impaired release of acetylcholine, which causes proximal muscle weakness, depressed tendon reflexes, and autonomic changes. Most cases of Lambert-Eaton syndrome present in small-cell lung carcinoma, and only a few cases have been reported in other lung subtypes. Herein, we report a case of 69 years old male patient with Lambert-Eaton syndrome as a rare association with a pulmonary large-cell neuroendocrine carcinoma, which presented 5 months before neoplasm diagnosis.

Prenatal indole-3-carbinol administration activates aryl hydrocarbon receptor-responsive genes and attenuates lung injury in a bronchopulmonary dysplasia model.

Hyperoxia-hypoxia exposure is a proposed cause of alveolar developmental arrest in bronchopulmonary dysplasia in preterm infants, where mitochondrial reactive oxygen species and oxidative stress vulnerability are increased. The aryl hydrocarbon receptor (AhR) is one of the main activators of the antioxidant enzyme system that protects tissues and systems from damage. The present study aimed to determine if the activation of the AhR signaling pathway by prenatal administration of indole-3-carbinol (I3C) protects rat pups from hyperoxia-hypoxia-induced lung injury.

Metastatic colorectal micropapillary carcinoma presenting as lymphangitic lung carcinomatosis.

Pulmonary lymphangitic carcinomatosis denotes the infiltration of tumor cells into the lung parenchymal lymphatic channels. Breast, lung, stomach, and colon adenocarcinoma are the most common origin of this invasion pattern. The micropapillary variant of colorectal adenocarcinoma has a high rate of lymph node metastases and poor overall survival.