Correct!

1. The tracheobronchial thickening in RPC characteristically involves the posterior tracheal membrane

The tracheobronchial thickening in RPC characteristically spares the posterior tracheal membrane. The tracheal thickening in RPC classically involves the anterior two-thirds of the trachea and bronchi and spares the posterior one-third as cartilage is absent in these portions of the airways. Tracheobronchial malacia is characteristic of this disorder, and the tracheobronchial thickening may show calcification over time. The tracheobronchial thickening in RPC is usually smooth and long-segment, which may assist in differentiation from other causes of tracheobronchial thickening, such as sarcoidosis, amyloidosis, and Wegener’s granulomatosis, which may show nodularity.)

References

  1. Chung JH, Kanne JP, Gilman MD. CT of diffuse trachea disease. Am J Roentgenol AJR 2011; 196:W240-246.
  2. Webb EM, Elicker BM, Webb WR. Using CT to diagnose nonneoplastic tracheal abnormalities: appearance of the tracheal wall. Am J Roentgenol AJR 2000; 174:1315- 1321.
  3. Restrepo S, Pandit M, Villamil MA, Rojas IC, Perez JM, Gascue A. Tracheobronchopathia osteochondroplastica: helical CT findings in 4 cases. J Thorac Imag 2004; 19:112-116.
  4. Prince JS, Duhamel DR, Levin DL, Harrell JH, Friedman PJ. Nonneoplastic lesions of the tracheobronchial wall: radiologic findings with bronchcoscopic correlation. RadioGraphics 2002: 22:S215-S230.
  5. Behar JV, Choi Y-W, Hartman TA, Allen NB, McAdams HP/ Relapsing polychondritis affecting the lower respiratory tract. Am J Roentgenol AJR 2002; 178:173- 177.

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