Paraneoplastic Pemphigus Involving the Respiratory and Gastrointestinal Mucosae

Figure 3

Opportunistic infections in the lung. Gross appearance of aspergillosis reveals irregular-shaped foci of infarction rimmed with hemorrhage (a and b). Mycotic embolization is indicated by the yellow arrow (a). Interstitial reactions with fibrinous exudation are seen segmentally (b: asterisks). Red arrows indicate erosions in the bronchial mucosa. Hypha-forming Aspergillus colonizes the eroded bronchiolar mucosa (c, HE and d, Grocott). CMV infection has provoked interstitial pneumonia (e, HE). Frothy intra-alveolar exudation represents pneumocystosis jirovecii (f, HE, inset: Grocott).

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