13
Respiratory Tract
Fig. 13.14 Reactive alveolar epithelium. A three-dimensional papillary
Fig. 13.15 Hyperplasia of type II pneumocytes (see Fig. 13.16). Sputum
fragment of type II pneumocytes from a patient with organizing pneumonia.
(PapaniCO|aOU x OI).
Such fragments may be virtually indistinguishable from those exfoliated from
bronchioloalveolar carcinoma. Sputum (Papanicolaou x MP).
Fig. 13.16 Organizing pneumonia and hyperplasia of type II alveolar
pneumocytes. The cells depicted in Fig. 13.15 are from the same case.
Section of lung at autopsy (H&E x OI).
Fig. 13.17 Reactive alveolar epithelium. A three-dimensional ball-like
cluster of type II pneumocytes from a patient with organizing pneumonia.
Similar groups may be observed in bronchioloalveolar carcinomas. Sputum
(Papanicolaou x OI).
Fig. 13.18 Reactive alveolar epithelium. A three-dimensional ball-like
cluster of type II pneumocytes mimicking the configuration that may be seen
Fig. 13.19 Hyperplastic type II pneumocytes. Sputum
in bronchioloalveolar carcinoma. Sputum (Papanicolaou x OI).
(Papanicolaou x OI).
311
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