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Expression of developing neural transcription factors in diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH)

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Abstract

DIPNECH is characterized by neuroendocrine cell hyperplasia, tumorlets, and eventually carcinoid tumors. Although it is regarded by some authors as a preneoplastic condition, this issue is controversial. New pathologic criteria have recently been proposed for the diagnosis of DIPNECH, and a subgroup of carcinoid tumors expressing developing neural transcription factors (DNTFs), with clinicopathologic features similar to those of DIPNECH, has been recognized. This paper reports on the clinical and pathological findings in three cases of DIPNECH and investigates the expression of three DNTFs (TTF1, ASCL1, and POU3F2). All patients were female, with a mean age of 63 years, and all lesions were located in the periphery of the lung. In two cases, typical carcinoids were associated with a spindle-cell component. All neuroendocrine proliferations were DNTF positive. The morphologic (spindle-cell component), phenotypic (DNTF expression), and clinicopathologic (peripheral tumors, female predominance) similarities suggest that DIPNECH may be a preneoplastic lesion for peripheral carcinoids.

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Author information

Correspondence to María José Ríos Moreno.

Ethics declarations

This study was performed according to the clinical standards of the 1975 and 1983 Declaration of Helsinki and was approved by the Ethical Committee of the Virgen Macarena Hospital, Seville, Spain (12th October 2015).

Conflict of interest

The authors declare that they have no conflict of interest.

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Escudero, A.G., Zarco, E.R., Arjona, J.C.G. et al. Expression of developing neural transcription factors in diffuse idiopathic pulmonary neuroendocrine cell hyperplasia (DIPNECH). Virchows Arch 469, 357–363 (2016). https://doi.org/10.1007/s00428-016-1962-5

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Keywords

  • DIPNECH
  • Lung neuroendocrine tumors
  • Developing neural transcription factors
  • Pathology
  • Preneoplastic lesion