PMC6538950_01
(A) Plain computed tomography (lung window) showing multiple nodules. (B) Obstructive atelectasis of the lingular segment secondary to tumor pressure. (C) (D) Post-hormone therapy changes (6 months after treatment).
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Computed tomography showed mediastinal lymph node enlargement and obstruction of the lingular lung segment (Fig. 1). His cough improved with treatment, and we saw rapid regression of the multiple lung nodules, enlarged lymph node, and obstruction of the lingular segment (Fig. 1).
Routine bronchoscopy showing the diffuse bronchial area with multiple soft polypoid lesions.
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Bronchoscopy revealed the presence of multiple whitish soft masses on the bronchial surface (Fig. 2), and biopsy involved easy and extensive detachment of tissue around the tumor, with slight bleeding.
Immunohistochemistry of the biopsied lung tissue. (A) Adenocarcinoma with a medullary tubular appearance (hematoxylin and eosin stain). (B) Negative labeling with thyroid transcription factor-1 ( x 40). (C) Note the strong reaction with prostate-specific antigen ( x 40, polyclonal).
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Immunohistological staining revealed positive prostate-specific antigen (PSA) and negative thyroid transcription factor-1 (Fig. 3).