Data di Pubblicazione:
2022
Citazione:
The Octopus Sign-A New HRCT Sign in Pulmonary Langerhans Cell Histiocytosis / A. Poellinger, S. Berezowska, J.L. Myers, A. Huber, M. Funke-Chambour, S. Guler, T. Geiser, S. Harari, A. Caminati, M. Zompatori, N. Sverzellati. - In: DIAGNOSTICS. - ISSN 2075-4418. - 12:4(2022 Apr 08), pp. 937.1-937.8. [10.3390/diagnostics12040937]
Abstract:
Background: Fibrosis in pulmonary Langerhans cell histiocytosis (PLCH) histologically comprises a central scar with septal strands and associated airspace enlargement that produce an octopus-like appearance. The purpose of this study was to identify the octopus sign on high-resolution computed tomography (HRCT) images to determine its frequency and distribution across stages of the disease. Methods: Fifty-seven patients with confirmed PLCH were included. Two experienced chest radiologists assessed disease stages as early, intermediate, or late, as well as the lung parenchyma for nodular, cystic, or fibrotic changes and for the presence of the octopus sign. Statistical analysis included Cohen's kappa for interrater agreement and Fisher's exact test for the frequency of the octopus sign. Results: Interobserver agreement was substantial for the octopus sign (kappa = 0.747). Significant differences in distribution of the octopus sign between stages 2 and 3 were found with more frequent octopus signs in stage 2 and fewer in stage 3. In addition, we only found the octopus sign in cases of nodular and cystic lung disease. Conclusions: The octopus sign in PLCH can be identified not only on histological images, but also on HRCT images. Its radiological presence seems to depend on the stage of PLCH.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
cystic lung disease; high-resolution computed tomography (HRCT); nodular lung disease; pathology; pulmonary Langerhans cell histiocytosis (PLCH)
Elenco autori:
A. Poellinger, S. Berezowska, J.L. Myers, A. Huber, M. Funke-Chambour, S. Guler, T. Geiser, S. Harari, A. Caminati, M. Zompatori, N. Sverzellati
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