Exhibit 21.1



RADIATION THERAPY SERVICES, INC.



List of Subsidiaries



|                                 |  |                                                                                                                              |  |                        |  |            
|-------------------------------- |  | ---------------------------------------------------------------------------------------------------------------------------- |  | ---------------------- |  | -----------
|OWNER                            |  | SUBSIDIARY                                                                                                                   |  | STATE OF INCORPORATION |  | % OWNERSHIP
|Radiation Therapy Services, Inc. |  | 21stCentury Oncology, Inc.                                                                                                   |  | Florida                |  | 100%       
|                                 |  |                                                                                                                              | 
|Radiation Therapy Services, Inc. |  | California Radiation Therapy Management Services, Inc.                                                                       |  | California             |  | 100%       
|                                 |  |                                                                                                                              | 
|Radiation Therapy Services, Inc. |  | North Carolina Radiation Therapy Management Services, Inc.                                                                   |  | North Carolina         |  | 100%       
|                                 |  |                                                                                                                              | 
|Radiation Therapy Services, Inc. |  | Maryland Radiation Therapy Management Services, Inc.                                                                         |  | Maryland               |  | 100%       
|                                 |  |                                                                                                                              | 
|Radiation Therapy Services, Inc. |  | New York Radiation Therapy Management Services, Inc.                                                                         |  | New York               |  | 100%       
|                                 |  |                                                                                                                              | 
|Radiation Therapy Services, Inc. |  | Financial Services of Southwest Florida, LLC (surviving entity in merger with Financial Services of Southwest Florida, Inc.) |  | Florida                |  | 100%       
|                                 |  |                                                                                                                              | 
|Radiation Therapy Services, Inc. |  | Radiation Therapy School for Radiation Therapy Technology, Inc.                                                              |  | Florida                |  | 100%       



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|                                                     |  |                                                            |  |               |  |      
|---------------------------------------------------- |  | ---------------------------------------------------------- |  | ------------- |  | -----
|Radiation Therapy Services, Inc.                     |  | 21stCentury Oncology of Kentucky, LLC                      |  | Kentucky      |  | 100% 
|                                                     |  |                                                            | 
|Radiation Therapy Services, Inc.                     |  | 21stCentury Oncology of Alabama, Inc.                      |  | Alabama       |  | 100% 
|                                                     |  |                                                            | 
|Radiation Therapy Services, Inc.                     |  | South County Radiation Therapy, LLC                        |  | Rhode Island  |  | 63.5%
|                                                     |  |                                                            | 
|Radiation Therapy Services, Inc.                     |  | Southern New England Regional Cancer Center, LLC           |  | Rhode Island  |  | 62%  
|                                                     |  |                                                            | 
|Radiation Therapy Services, Inc.                     |  | Devoto Construction of Southwest Florida, Inc.             |  | Florida       |  | 100% 
|                                                     |  |                                                            | 
|Radiation Therapy Services, Inc.                     |  | 21stCentury Oncology of New Jersey, Inc.                   |  | New Jersey    |  | 100% 
|                                                     |  |                                                            | 
|Radiation Therapy Services, Inc.                     |  | New England Radiation Therapy Management Services, Inc.    |  | Massachusetts |  | 100% 
|                                                     |  |                                                            | 
|Radiation Therapy Services, Inc.                     |  | Arizona Radiation Therapy Management Services, Inc.        |  | Arizona       |  | 100% 
|                                                     |  |                                                            | 
|Maryland Radiation Therapy Management Services, Inc. |  | Northwest Baltimore Radiation Therapy Regional Center, LLC |  | Maryland      |  | 90%  
|                                                     |  |                                                            | 
|Maryland Radiation Therapy Management Services, Inc. |  | Berlin Radiation Therapy Treatment Center, LLC             |  | Maryland      |  | 50.1%



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|                                                     |  |                                                    |  |               |  |     
|---------------------------------------------------- |  | -------------------------------------------------- |  | ------------- |  | ----
|Maryland Radiation Therapy Management Services, Inc. |  | Ambergris, LLC                                     |  | West Virginia |  | 60% 
|                                                     |  |                                                    | 
|21stCentury Oncology of Kentucky, LLC                |  | Bluegrass Regional Cancer Center, LLP              |  | Kentucky      |  | 90% 
|                                                     |  |                                                    | 
|21stCentury Oncology, Inc.                           |  | Nevada Radiation Therapy Management Services, Inc. |  | Nevada        |  | 100%
|                                                     |  |                                                    | 
|21stCentury Oncology, Inc.                           |  | Palms West Radiation Therapy, LLC                  |  | Florida       |  | 50% 
|                                                     |  |                                                    | 
|21stCentury Oncology, Inc.                           |  | Palmetto Radiation Associates, LLC                 |  | Florida       |  | 50% 
|                                                     |  |                                                    | 
|21stCentury Oncology, Inc.                           |  | Naples PET, LLC                                    |  | Florida       |  | 40% 
|                                                     |  |                                                    | 
|New York Radiation Therapy Management Services, Inc. |  | Faxton Leasing, LLC                                |  | New York      |  | 37% 



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