Brief Title
Study of Skin Tumors in Tuberous Sclerosis
Official Title
Cutaneous Tumorigenesis in Patients With Tuberous Sclerosis
Brief Summary
Tuberous sclerosis is a rare, hereditary disease in which patients develop multiple tumors. Although not cancerous, the tumors can affect various organs, including the heart, lungs, kidneys, skin, and central nervous system, with serious medical consequences. The severity of disease varies greatly among patients, from barely detectable to fatal. This study will investigate what causes skin tumors to develop in patients with this disease. Patients with tuberous sclerosis 18 years and older may enroll in this study. Participants will undergo a medical history and thorough skin examination by a dermatologist. Those with skin tumors will be asked to undergo biopsy (tissue removal) of up to eight lesions, under a local anesthetic, for research purposes. The biopsies will all be done the same day. The tissue samples will be used for: examination of genetic changes, measurement of certain proteins and other substances, and growing in culture to study the genetics of tuberous sclerosis. ...
Detailed Description
Patients with tuberous sclerosis develop benign cutaneous tumors that are typically multiple in number and location. These tumors include facial angiofibromas, forehead plaques, shagreen patches, periungual fibromas, and gingival fibromas. The tumors are permanent, slow growing, and often disfiguring. The purpose of this study is to elucidate the molecular basis for these tumors. Specifically, we plan to identify the genetically altered cells in these hamartomatous lesions, and to quantify factors (e.g. cytokines) produced by these cells which induce the growth of these tumors. To accomplish this, we plan to obtain samples of these cutaneous tumors, to test tumor DNA for loss of heterozygosity, and to measure RNA and protein expression levels.
Study Type
Observational
Primary Outcome
1.Identify the tumor cells in cutaneous and mucosal tumors in patients with TSC through LOH studies on microdissected cell populations
Condition
Tuberous Sclerosis
Study Arms / Comparison Groups
Group 1
Description: Patients will be those already diagnosed with TSC (definite or possible)
Publications
* Includes publications given by the data provider as well as publications identified by National Clinical Trials Identifier (NCT ID) in Medline.
Recruitment Information
Estimated Enrollment
400
Start Date
January 26, 2000
Eligibility Criteria
- INCLUSION CRITERIA: Patients will be those already diagnosed with TSC (definite, probable, or possible) based on clinical criteria and/or genetic testing, and ranging in age from 18 to 90 years old. The clinical features of TSC considered of major significance are: facial angiofibromas or forehead plaque, nontraumatic periungual fibromas, three or more hypomelanotic macules, shagreen patch, multiple retinal nodular hamartomas, cortical tuber, subependymal nodule, subependymal giant cell astrocytoma, cardiac rhabdomyoma, lymphangioleiomyomatosis, and renal angiomyolipoma. The minor features of TSC are: multiple randomly distributed pits in dental enamel, hamartomatous rectal polyps, bone cysts, cerebral white matter radial migration lines, gingival fibromas, nonrenal hamartoma, retinal achromic patch, confetti skin lesions, and multiple renal cysts (5). Definite TSC is diagnosed by the presence of two major features or one major feature plus two minor features. Probable TSC is diagnosed by the presence of one major feature and one minor feature. Possible TSC is diagnosed by the presence of either one major feature or two or more minor features. Patients will not be preselected for skin lesions, but about 80% of patients with TSC are expected to have skin lesions. EXCLUSION CRITERIA: Inability to give informed consent. Tendency to keloid formation. Allergy to anesthetics. Bleeding abnormality.
Gender
All
Ages
18 Years - 90 Years
Accepts Healthy Volunteers
No
Contacts
Joel Moss, M.D., (301) 827-1376, [email protected]
Location Countries
United States
Location Countries
United States
Administrative Informations
NCT ID
NCT00001975
Organization ID
000051
Secondary IDs
00-H-0051
Responsible Party
Sponsor
Study Sponsor
National Heart, Lung, and Blood Institute (NHLBI)
Collaborators
Uniformed Services University of the Health Sciences
Study Sponsor
Joel Moss, M.D., Principal Investigator, National Heart, Lung, and Blood Institute (NHLBI)
Verification Date
July 28, 2022