A pulmonary neoplasm with cytologic characteristics typical of differentiated small intestinal epithelium is reported. Individual cells showed features suggesting columnar absorptive, goblet, Paneth, and neuroendocrine cell differentiation. Thorough investigation and follow-up for 4 years did not identify a primary tumor other than in the lung. The occurrence of such a neoplasm at this site is evidence for the existence of a common stem cell in the lower respiratory and gastrointestinal tract mucosa.
No takes yet. Share an insight, caveat, or question.
Tsao et al. (1991) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: