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TSC1 and TSC2 mutations in patients with lymphangioleiomyomatosis and tuberous sclerosis complex
  1. D A Muzykewicz1,
  2. A Sharma2,
  3. V Muse2,
  4. A L Numis1,
  5. J Rajagopal3,
  6. E A Thiele1
  1. 1
    Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, USA
  2. 2
    Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts, USA
  3. 3
    Pulmonary and Critical Care Unit, Massachusetts General Hospital, Boston, Massachusetts, USA
  1. Dr E A Thiele, Carol and James Herscot Center for Tuberous Sclerosis Complex, 175 Cambridge Street, Suite 340, Boston, MA 02114, USA; ethiele{at}partners.org

Abstract

Background: Lymphangioleiomyomatosis (LAM) is a prominent finding in the setting of tuberous sclerosis complex (TSC).

Objective: The present study was designed to compare cystic lung changes consistent with LAM in patients with a TSC1 disease-causing mutation, TSC2 disease-causing mutation, or no mutation identified (NMI).

Methods and results: We conducted a retrospective review of the chest computed tomography (CT) of 45 female and 20 male patients with TSC and found cysts consistent with LAM in 22 (49%) women and two (10%) men. In the female population, changes consistent with LAM were observed in six of 15 (40%) patients with TSC1, 11 of 23 (48%) with TSC2, and five of seven (71%) with NMI. While the predominant size of cysts did not differ across these three groups, TSC2 women with LAM had a significantly greater number of cysts than did TSC1 patients (p = 0.010).

Conclusions: These findings suggest a higher rate of LAM in TSC1 than previously recognised, as well as a fundamental difference in CT presentation between TSC1 and TSC2.

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Footnotes

  • Funding: This study was supported by the Carol and James Herscot Center for Tuberous Sclerosis Complex

  • Competing interests: None.

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