Discussion
Diagnosis With Brief Discussion
- Diagnosis
- Tuberous sclerosis associated Lymphangioleiomyomatosis
- Radiologic Findings
- Chest radiographies demonstrate a large bullae in the left upper lung zone and variable-sized air cysts or emphysema in the both lungs.
Axial contrast enhanced chest CT images (lung window setting) show numerous thin-walled cysts surrounded by normal lung parenchyma and distributed diffusely and bilaterally. Including abdominal images of axial contrast enhanced chest CT demonstrate the right kidney enlargement by numerous cysts and a mass of mixed attenuation containing vascular structures; variable-sized multiple cortical cysts and containing fat and enhancing vascular component.
Axial T2WI brain MR image shows multiple subependymal nodules (arrowheads) in the both lateral ventricles. Axial FLAIR brain MR image shows slightly increased signal intensity (white arrows) in the both frontal and right parietal cortex.

Figure 6

Figure 7
- Brief Review
- Lymphangioleiomyomatosis (LAM) is a rare interstitial lung disease that affects women exclusively, typically during their reproductive years. A small percentage of patients, also typically women, have LAM in association with tuberous sclerosis complex (TSC). LAM is characterized by the abnormal proliferation of smooth muscle cells (LAM cells) in the lungs and in the thoracic and retroperitoneal lymphatics. Affected patients are at risk of developing renal hamartomas or angiomyolipomas. Patients with LAM characteristically present with chronic dyspnea and cough and less commonly with spontaneous pneumothorax.
Tuberous Sclerosis Complex is an inheritable autosomal dominant disorder characterized by multifocal systemic hamartomas that may affect the central nervous system, skin, heart, kidneys, and other organs. The Vogt triad of epileptic seizures, mental retardation, and facial angiofibromas (formerly misnamed as adenoma sebaceum) is exhibited by only approximately 29% of affected patients.
Relationship between TSC and LAM; Although histologic and clinical features may be identical in women with LAM and patients with TSC-associated pulmonary involvement, there are reported differences. Patients with TSC- associated LAM, compared with patients with sporadic LAM, generally experience a longer delay between onset of symptoms and diagnosis of pulmonary disease, exhibit chylothoraces less frequently, and are more likely to present with gradual onset of dyspnea.
Radiographic abnormalities in patients with LAM have been reported as a pattern of generalized, symmetric, reticular, or reticulonodular opacities, seen in approximately 80%-90% of affected patients. Lung volumes have been reported as normal at chest radiography in 55%-78% of affected patients and increased in 22%-45%. Pneumothorax is a common clinical and radiographic presenting manifestation of LAM, reported in 39%-53% of patients. Pleural effusion (secondary to chylothorax) is a common radiographic feature, occurring in 10%-20% of patients, and may be unilateral or bilateral.
The CT manifestations of LAM are distinctive, characterized by numerous thin-walled cysts surrounded by normal lung parenchyma and distributed diffusely and bilaterally. Occasionally, a chylous effusion is suggested at chest CT based on low-attenuation (- 17HU) fluid that may relate to the presence of fat.
Renal angiomyolipomas have been observed on abdominal CT scans of 20%-54% of patients with LAM. These tumors are characterized by CT evidence of soft tissue, fat, and enhancing vessels in variable proportions within a renal mass.
A variety of intracranial manifestations of TS are known. Four common CNS abnormalities are cortical tubers, subependymal nodules, subependymal giant cell astrocytomas (SGCAs), and white matter abnormalities. Except for SGCAs, these abnormalities can be seen in almost all patients with TS.
- References
- 1. Abbott GF, Rosado-de-Christenson ML, Frazier AA, Franks TJ, Pugatch RD, Galvin JR; From the archives of the AFIP: lymphangioleiomyomatosis: radiologic-pathologic correlation. Radiographics. 2005 May-Jun;25(3):803-28.
2. Johnson SR, Cordier JF, Lazor R, Cottin V, Costabel U, Harari S, Reynaud-Gaubert M, Boehler A, Brauner M, Popper H, Bonetti F, Kingswood C; Review Panel of the ERS LAM Task Force. European Respiratory Society guidelines for the diagnosis and management of lymphangioleiomyomatosis. Eur Respir J. 2010 Jan;35(1):14-26.
3. Pallisa E, Sanz P, Roman A, Maj� J, Andreu J, C�ceres J. ; Lymphangioleiomyomatosis: Pulmonary and Abdominal Findings with Pathologic Correlation. Radiographics. 2002 Oct;22 Spec No:S185-98. Review.
- Keywords
- lung, congenital,