case_images: PMC10019996_01
case_images: CT scan images of IMT.
case_images: 10-1055-a-2021-8054-i2022060676cr-1.jpg
case_images: PMC10019996_01_10-1055-a-2021-8054-i2022060676cr-1.jpg
case_images: FI2022060676cr-1
case_images: Chest CT scan showed a peripheral atelectasis area in the left upper lobe and identified a 1.5-cm lesion in the left main bronchus ( Fig. 1 ).
case_images: Endoscopic appearance of the endoluminal lesion in the left main bronchus, obliterating almost all the bronchial lumen.
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case_images: PMC10019996_01_10-1055-a-2021-8054-i2022060676cr-2.jpg
case_images: FI2022060676cr-2
case_images: Ten days after, the patient underwent flexible bronchoscopy, revealing the complete obstruction of the left main stem bronchus, which was attributed to a translucent and easily bleeding mass ( Fig. 2 ).
case_images: Schematic drawing of the surgical resection.
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case_images: PMC10019996_01_10-1055-a-2021-8054-i2022060676cr-3.jpg
case_images: FI2022060676cr-3
case_images: The mass was identified by fibroendoscopy with transillumination of the proximal margin ( Fig. 3 ).
case_images: The endobronchial lesion is seen at low magnification (20 x ) as a polypoid mass protruding in the bronchial lumen (
  A
  ); the lesion has a moderate cellularity with a fibrohistiocytic appearance composed by spindle cells (myofibroblasts) and a variable numbers of plasma cells, lymphocytes, histiocytes admixed; the stroma is focally myxoid (magnification 200 x ) (
  B, C
  ).
case_images: 10-1055-a-2021-8054-i2022060676cr-4.jpg
case_images: PMC10019996_01_10-1055-a-2021-8054-i2022060676cr-4.jpg
case_images: FI2022060676cr-4
case_images: Definitive histology confirmed the initial diagnosis of IMT with free margins of resection ( Fig. 4 ). 