Exhibit 3.38

As Adopted February 13, 2006

AMENDED AND RESTATED BYLAWS

SARASOTA RADIATION & MEDICAL ONCOLOGY CENTER, INC.

ARTICLE I

Offices

The principal office shall be in the State of Florida or at such other location, within or outside of Florida as the Board of Directors may elect.

The corporation may also have offices at such other places both within and without the State of Florida as the Board of Directors may from time to time determine or the business of the corporation may require.

ARTICLE II

Shareholders

Section 1. Annual Meeting. The annual meeting of the shareholders shall be held within the three (3) month period beginning with the first day of the last month of the fiscal year of the corporation for the purpose of electing directors and for the transaction of such other business as may come before the meeting, the actual day thereof to be set forth in the Notice of Meeting or in the Call and Waiver of Notice of Meeting. If the election of directors shall not be held at any such annual meeting of the shareholders, or at any adjournment thereof, the Board of Directors shall cause the election to be held at a special meeting of the shareholders as soon thereafter as may be convenient.

Section 2. Special Meetings. Special meetings of the shareholders for any purpose or purposes, unless otherwise prescribed by law or by the Articles of Incorporation, may be called by the President or by the Board of Directors, and shall be called by President or Secretary at the request in writing of a majority of the Board of Directors then in office, or at the request in writing of shareholders owning not less than one-tenth (1/10th) of the entire capital stock of the corporation issued and outstanding and entitled to vote thereat. Such request shall state the purpose or purposes of the proposed meeting. Business transacted at any special meeting of shareholders shall be limited to the purposes stated in the notice thereof.

Section 3. Place of Meeting. The Board of Directors may designate any place either within or without the State of Florida, unless otherwise prescribed by law or by the Articles of Incorporation, as the place of meeting for any annual meeting or for any special meeting of the shareholders. A waiver of notice signed by all shareholders entitled to vote at a meeting may designate any place either within or without the State of Florida, unless otherwise prescribed by law or by the Articles of Incorporation, as the place for the holding of such meeting. If no

designation is made or if a special meeting be otherwise called, the place of meeting shall be the principal office of the corporation in the State of Florida.

Section 4. Notice of Meeting. Written or printed notice stating the place, day and hour of the meeting, and in the case of a special meeting, the purpose or purposes for which the meeting is called shall be delivered not less than ten (10) nor more than sixty (60) days before the date of the meeting, either by hand delivery, express or other delivery service, telecopier, telegram, telex, mailgram, cablegram or other delivery method or by first-class mail, by or at the direction of the President or the Secretary, or the officer or persons calling the meeting, to each shareholder of record entitled to vote at such meeting. If mailed, such notice shall be deemed to be delivered when deposited in the United States mail, addressed to the shareholder at his or her business or home address or the shareholder’s address as it appears on the stock transfer books of the corporation, with postage thereon prepaid.

Section 5. Waiver of Notice of Meeting. Whenever any notice to a shareholder is required pursuant to the provisions of Section 4 hereinabove, each shareholder may waive such notice in writing at any time before or after the time for the delivery of such notice, and such written waiver of notice shall be equivalent to the giving of such notice. Attendance at any meeting by any shareholder to whom notice of such meeting must be given pursuant to the provisions of Section 4 hereinabove shall constitute a waiver of notice of such meeting by such shareholder, except when the shareholder attends such meeting for the express purpose of objecting, at the beginning of the meeting, to the transaction of any business at the meeting because the meeting is not lawfully called or convened.

Section 6. Voting Lists. The officer or agent having charge of the stock transfer books for shares of the corporation shall make, at least ten (10) days before each meeting of shareholders, a complete list of the shareholders entitled to vote at such meeting or any adjournment thereof arranged in alphabetical order, with the address and the number and class and series of shares held by each; which list, for a period of ten (10) days prior to such meeting, shall be kept on file at the principal office of the corporation and shall be subject to inspection by any shareholder during the whole time of the meeting. The original stock transfer book shall be prima facie evidence as to who are the shareholders entitled to examine such list or transfer books or to vote at any meeting of the shareholders.

Section 7. Quorum. A majority of the outstanding shares of the corporation entitled to vote, represented in person or by proxy, shall constitute a quorum at a meeting of shareholders, unless otherwise provided in the Articles of Incorporation, but in no event shall a quorum consist of less than one-third (1/3) of the shares entitled to vote at the meeting. If less than a majority of the outstanding shares are represented at a meeting, a majority of the shares so represented may adjourn the meeting from time to time without further notice. At such adjourned meeting at which a quorum shall be present or represented, any business may be transacted which might have been transacted at the meeting as originally notified. The shareholders present at a duly organized meeting may continue to transact business until adjournment, notwithstanding the withdrawal of enough shareholders to leave less than a quorum.

Section 8. Voting of Shares. Each shareholder entitled to vote shall at every meeting of the shareholders be entitled to one (1) vote in person or by proxy, signed by him, for each share

of the corporation’s common stock held by him. Such right to vote shall be subject to the right of the Board of Directors to close the transfer books or to fix a record date for voting shareholders pursuant to the provisions of Article VIII hereinafter.

Section 9. Proxies. At all meetings of shareholders, a shareholder may vote by proxy, executed in writing by the shareholder or by his or her duly authorized attorney-in-fact; but no proxy shall be valid after eleven (11) months from its date, unless the proxy provides for a longer period. Such proxies shall be filed with the Secretary of the corporation before or at the time of the meeting.

Section 10. Informal Action by Shareholders.

(a) Any action which may be taken or is required by law to be taken at any annual or special meeting of the shareholders may be taken without a meeting and without a vote, if a consent in writing, setting forth the action so taken, shall be signed by the holders of a majority of the outstanding common stock of the corporation. If any class of stock is entitled to vote thereon as a class, such written consent shall be required of the holders of a majority of the stock of each class of stock entitled to vote as a class thereon and of the total stock entitled to vote thereon.

(b) Unless all of the holders of the outstanding stock of the corporation have signed a written consent to an action in accordance with the provisions of paragraph (a) herein above, then within ten (10) days after obtaining such written consent notice must be given to those shareholders who have not so consented in writing. The notice shall fairly summarize the material features of the authorized action, and, if the action be a merger, consolidation, or sale or exchange of assets for which dissenters’ rights are provided by Florida law, the notice shall contain a clear statement of the right of Shareholders dissenting therefrom to be paid the fair value of their shares upon compliance with Florida law regarding the rights of dissenting shareholders.

ARTICLE III

Board of Directors

Section 1. General Powers. The business and affairs of the corporation shall be managed by its Board of Directors.

Section 2. Number, Tenure and Qualifications. The number of directors of the corporation shall be not less than one (1) nor more than fifteen (15); the number of the same to be fixed by the shareholders at any annual or special meeting. Each director shall hold office until the next annual meeting of shareholders or until his or her successor has been elected, unless sooner removed by the shareholders at any general or special meeting. None of the directors need be residents of the State of Florida.

Section 3. Annual Meeting. After each annual, meeting of shareholders, the Board of Directors shall hold its annual meeting at the same place as and immediately following such annual meeting of shareholders for the purpose of the election of officers and the transaction of

such other business as may come before the meeting; and if a majority of the directors be present at such place and time, no prior notice of such meeting shall be required to be given to the directors. The place and time of such meeting may also be fixed by written consent of the directors.

Section 4. Regular Meetings. Regular meetings of the Board of Directors may be held without notice at such time and at such place as shall be determined from time to time by the Board of Directors.

Section 5. Special Meetings. Special meetings of the Board of Directors may be called by the Chairman of the Board, if there be one, or the President or any two (2) directors. The person or persons authorized to call special meetings of the Board of Directors may fix the place, time and date for holding any special meetings of the Board of Directors called by them.

Section 6. Notice of Meeting or Waiver Thereof. Notice of any special meeting shall be given at least two (2) days prior thereto by written notice delivered personally or mailed to each director at his or her business or home address. If mailed, such notice shall be deemed to be delivered when deposited in the United States mail so addressed with postage thereon prepaid. If notice be given by telegram, such notice shall be deemed to be delivered when the telegram is delivered to the telegraph company. If notice is given by cablegram, such notice shall be deemed to be delivered when the cablegram is dispatched. Any director may waive notice of such meeting either before, at or after such meeting. The attendance of a director at a meeting shall constitute a waiver of notice of such meeting, except where a director attends a meeting or the express purpose of objecting to the transaction of any business because the meeting is not lawfully called or convened. Notice need not specify the purpose of any meeting.

Section 7. Quorum. A majority of the directors shall constitute a quorum, but a smaller number may adjourn from time to time without further notice until a quorum is secured.

Section 8. Manner of Acting. The act of a majority of the directors voting for or against (disregarding any abstentions) at a meeting at which a quorum is present shall be the act of the Board of Directors.

Section 9. Vacancies. Any vacancy occurring in the Board of Directors, including any vacancy created by reason of an increase in the number of directors, may be filled by the affirmative vote of a majority of the remaining directors, though less than a quorum of the Board of Directors. A director elected to fill a vacancy shall be elected for the unexpired term of his or her predecessor in office.

Section 10. Compensation. By resolution of the Board of Directors, the directors may be paid their expenses, if any for attendance at each meeting of the Board of Directors, and may be paid a fixed sum for attendance at each meeting of the Board of Directors, or a stated salary as directors. No payment shall preclude any director from serving the corporation in any other capacity and receiving compensation therefor.

Section 11. Presumption of Assent. A director who is present at a meeting at which action on any corporate matter is taken shall be presumed to have assented to the action taken,

unless he votes against such action or abstains from voting in respect thereto. A director may abstain from voting on any matter in his or her sole discretion.

Section 12. Informal Action by Board. Any action required or permitted to be taken by any provisions of law, by the Articles of Incorporation or these bylaws at any meeting of the Board of Directors or of any committee thereof may be taken without a meeting if, prior to such action, a written consent thereto is signed by all members of the Board or of such committee, as the case may be, setting forth the actions so to be taken and filed in the minutes of the proceedings of the Board or of the committee.

Section 13. Telephonic Meetings. Members of the Board of Directors or an executive committee shall be deemed present at a meeting of such Board or committee if a conference telephone, or similar communications equipment, by means of which all persons participating in the meeting can hear each other at the same time, is used.

Section 14. Removal. Any director may be removed, with or without cause, by the shareholders at any general or special meeting or the shareholders whenever, in the judgment of the shareholders, the best interest of the corporation will be served thereby, but such removal shall be without prejudice to the contract rights, if any, of the person removed. This bylaw shall not be subject to change by the Board of Directors.

ARTICLE IV

Offices

Section 1. Number. The officers of the corporation shall be a President, a Secretary and a Treasurer, each of whom shall be elected by the Board of Directors. The Board of Directors may also elect a Chairmen of the Board, one or more Vice Presidents, one or more assistant secretaries and assistant treasurers and such other officers as the Board of Directors deem appropriate. Any two (2) or more offices maybe held by the same person.

Section 2. Election and Term of Office. The officers of the corporation shall be elected annually by the Board of Directors at its first meeting after each annual meeting of shareholders. If the-election of officers shall not be held at such meeting, such election shall be held as soon thereafter as may be convenient. Each officer shall hold office until his or her successor shall have been duly elected and qualified or until his or her death or until he resigns or shall have been removed in the manner hereinafter provided.

Section 3. Removal. Any officer elected or appointed by the Board of Directors may be removed by the Board of Directors whenever, in its judgment, the best interest of the corporation will be served thereby, but such removal shall be without prejudice to the contract rights, if any, of the person so removed.

Section 4. Vacancies. A vacancy in any office because of death, resignation, removal, disqualification or otherwise may be filled by the Board of Directors for the unexpired portion of the term.

Section 5. Duties of Officers. The Chairman of the Board of the corporation, or the President if there shall not be a Chairman of the Board, shall preside over all meetings of the Board of Directors and of the Shareholders which he shall attend. The President shall be the chief executive officer of the corporation. Subject to the foregoing, the officers of the corporation shall have such powers and duties as usually pertain to their respective offices and such additional powers and duties specifically conferred by law, by the Articles of Incorporation, by these bylaws, or as may be assigned to them from time to time by the Board of Directors.

Section 6. Salaries. The salaries of the officers shall be fixed from time to time by the Board of Directors, and no officer shall be prevented from receiving such salary by reason of the fact that he is also a director of the corporation.

Section 7. Delegation of Duties. In the absence of or disability of any officer of the corporation or for any other reason deem sufficient by the Board of Directors, the Board may delegate his or her powers or duties to any other officer or to any other director for the time being.

ARTICLE V

Executive and Other Committees

Section 1. Creation of Committees. The Board of Directors may, by resolution passed by a majority of the Board, designate an Executive Committee and one (1) or more other committees, each to consist of one (1) or more of the directors of the corporation.

Section 2. Executive Committee. The Executive Committee, if there shall be one, shall consult with and advise the officers of the corporation in the management of its business and shall have and may exercise, to the extent provided in the resolution of the Board of Directors creating such Executive Committee, such powers of the Board of Directors as can be lawfully delegated by the Board.

Section 3. Other Committees. Such other committees shall have such functions and may exercise the powers of the Board of Directors, as can be lawfully delegated, and to the extent provided in the resolution or resolutions creating such committee or committees.

Section 4. Meetings of Committees. Regular meetings of the Executive Committee and other committees may be held without notice at such time and at such place as shall from time to time be determined by the Executive Committee or such other committees, and special meetings of the Executive Committee or such other committees may be called by any member thereof upon two (2) days’ notice to each of the other members of such committee; or on such shorter notice as may be agreed to in writing by each of the other members of such committee, given either personally or in the manner provided in Section 6 of Article III of these bylaws (pertaining to notice for directors’ meetings).

Section 5. Vacancies on Committees. Vacancies on the Executive Committee or on such other committees shall be filled by the Board of Directors then in office at any regular or special meeting.

Section 6. Quorum of Committees. At all meetings of the Executive Committee or such other committees, a majority of the committee members then in office shall constitute a quorum for the transaction of business.

Section 7. Manner of Acting of Committees. The acts of a majority of the members of the Executive Committee or such other committees present at any meeting at which there is a quorum shall be the act of such committee.

Section 8. Minutes of Committees. The Executive Committee, if there shall be one, and such other committees shall keep regular minutes of their proceedings and report the same to the Board of Directors when required.

Section 9. Compensation. Members of the Executive Committee and such other committees may be paid compensation in accordance with the provisions of Section 10 of Article III (pertaining to compensation of directors).

ARTICLE VI

Indemnification and Advancement of Expenses for
Directors, Officers, Employees and Agents

The corporation shall indemnify and advance expenses to any person who was or is a party to any proceeding or threatened proceeding by reason that he is or was a director, officer, employee, or agent of the corporation or is or was serving at the request of the corporation; subject in each instance to satisfaction of all applicable requirements under Chapter 607, Florida Statutes.

Additionally, the corporation may make any other or further indemnification or advancement of expenses of any of its directors, officers, employees, or agents, as it may desire; subject, however, to the restrictions contained in Chapter 607, and in particular Section 607.0850(7), Florida Statutes.

ARTICLE VII

Certificates of Stock

Section 1. Certificates for Shares. Every holder of stock in the corporation shall be entitled to have a certificate, signed by the President or a Vice President and the Secretary or an assistant secretary exhibiting the holder’s, name and certifying the number of shares owned by him in the corporation. The certificates shall be numbered and entered in the books of the corporation as they are issued.

Section 2. Transfer of Shares. Transfers of shares of the corporation shall be made upon its books by the holder of the shares in person or by his or her lawfully constituted representative upon surrender of the certificate of stock for cancellation. The person in whose name shares stand on the books of the corporation shall be deemed by the corporation to be the owner thereof for all purposes; and the corporations shall not be bound to recognize any equitable or other

claim to or interest in such shares on the part of any other person whether or not it shall have express or other notice thereof, save as expressly provided by the laws of the State of Florida.

Section 3. Facsimile Signature. Where a certificate is manually signed on behalf of a transfer agent or registrar other than the corporation itself or an employee of the corporation, the signature of any such President, Vice President, Secretary or assistant secretary may be a facsimile. In case any officer or officers who have signed or whose facsimile signature or signatures shall cease to be such officer or officers of the corporation, such certificate or certificates may, nevertheless, be adopted by the corporation and be issued and delivered as though the person or persons who signed such certificate or certificates or whose facsimile signature or signatures have been used thereon had not ceased to be such officer or officers of the corporation.

Section 4. Lost Certificates. The Board of Directors may direct that a new certificate or certificates be issued in place of any certificate or certificates theretofore issued by the corporation and alleged to have been lost or destroyed upon the making of an affidavit of that fact by the person claiming the certificate of stock to be lost or destroyed. When authorizing such issue of the new certificate or certificates. The Board of Directors may, in its discretion and as a condition precedent to the issuance thereof, require the owner of such lost or destroyed certificate or certificates or his or her legal representative to advertise the same in such manner as it shall require and/or to give the corporation a bond in such sum as it may direct as indemnity against any claim that may be made against the corporation with respect to the certificate alleged to have been lost or destroyed.

ARTICLE VIII

Record Date

The Board of Directors is authorized from time to time to fix in advance a date, not more than sixty (60) nor less than ten (10) days before the date of any meeting of shareholders, or not more than sixty (60) days prior to the date for the payment of any dividend or the date for the allotment of rights, or the date when any change or conversion of or exchange of stock shall go into effect, or a date in connection with the obtaining of the consent of shareholders for any purpose, as a record date for the determination of the shareholders entitled to notice of and to vote at any such meeting and any adjournment thereof, or entitled to receive payment of any such dividend, or to any such allotment, or to exercise the rights in respect of any such change, conversion or exchange of stock, or to give such consent, as the case may be; and, in such case; such shareholders and only such shareholders as shall be shareholders of record on the date so fixed shall be entitled to such notice of and to vote at such meeting and any adjournment thereof, or to receive payment of such dividend, or to receive such allotment of rights; or to exercise such rights, or to give such consent, as the case may be, notwithstanding any transfer of any stock on the books of the corporation after any such record date fixed as aforesaid.

ARTICLE IX

Dividends

The Board of Directors may from time to time declare and the corporation may pay dividends on its outstanding shares of capital stock in the manner and upon the team and conditions provided by the Articles of Incorporation and by law. Dividends may be paid in cash, in property or in share of stock subject to the provisions of the Articles of Incorporation and to law.

ARTICLE X

Fiscal Year

The fiscal year of the corporation shall be the twelve (12) month period selected by the Board of Directors as the taxable year of the corporation for Federal income tax purposes.

ARTICLE XI

Seal

The corporate seal shall bear the name of the corporation, which shall be between two concentric circles, and in the inside of the inner circle shall be the calendar year of Incorporation; an impression of said seal appearing on the margin hereof.

ARTICLE XII

Stock in Other Corporations

Shares of stock in other corporations held by this corporation shall be voted by such officer or officers of this corporation as the Board of Directors shall, from time to time designate for the purpose, or by a proxy thereunto duly authorized by said Board.

ARTICLE XIII

Amendments

These bylaws may be altered, amended, or repealed in whole or in part, and new bylaws may be adopted by the Board of Directors or by the vote of shareholders owning a majority of each class of the stock of the corporation entitled to vote thereon.