FIFTH AMENDMENT TO LOAN AND SECURITY AGREEMENT

This FIFTH AMENDMENT TO LOAN AND SECURITY AGREEMENT (this “Amendment”), dated as
of August 4, 2017, but effective as of July 31, 2017 (the “Fifth Amendment
Date”), is by and among CTI BIOPHARMA CORP., a Washington corporation formerly
known as, CELL THERAPEUTICS, INC., (“CTI”) (“Borrower”), HERCULES CAPITAL, INC.,
a Maryland corporation (“HC”), in its capacity as administrative agent for
itself and the Lender (in such capacity, the “Agent”), the Lenders otherwise a
party hereto from time to time including HC in its capacity as a Lender and
assignee of HERCULES CAPITAL FUNDING TRUST 2012-1, and HERCULES CAPITAL FUNDING
TRUST 2014 (“2014 Trust”), assignee of HERCULES CAPITAL FUNDING 2014-1 LLC,
assignee of HC (2014 Trust and HC collectively, referred to as, “Lender”).
WHEREAS, Borrower and Lender are parties to a certain Loan and Security
Agreement, dated as of March 26, 2013, as amended by a certain First Amendment
to the Loan and Security Agreement, dated as of March 25, 2014, as amended by a
certain Second Amendment to the Loan and Security Agreement, dated as of October
22, 2014, as amended by a certain Third Amendment to Loan and Security Agreement
dated as of June 9, 2015, and as further amended by a certain Fourth Amendment
to the Loan and Security Agreement dated as of December 11, 2015 (as the same
may from time to time be further amended, modified or supplemented in accordance
with its terms, the “Loan Agreement”); and
WHEREAS, in accordance with Section 11.3 of the Loan Agreement, Borrower and
Lender desire to amend the Loan Agreement as provided herein.
NOW THEREFORE, in consideration of the mutual agreements contained in the Loan
Agreement and herein and for other good and valuable consideration, the receipt
and sufficiency of which are hereby acknowledged, the parties hereto hereby
agree as follows:
1.    Defined Terms. Terms not otherwise defined herein which are defined in the
Loan Agreement shall have the same respective meanings herein as therein.
2.    Amendments to Loan Agreement. Subject to the satisfaction of the
conditions set forth in Section 3 of this Amendment, as of the Fifth Amendment
Date, the Loan Agreement is hereby amended as follows:
(a)    The Loan Agreement shall be amended by inserting the following new
definitions to appear alphabetically in Section 1.1 thereof:
“Deferred Payment” and “Deferred Payments” are defined in Section 2.1(d).
“2014 Deferred Payment” and “2014 Deferred Payments” are defined in Section
2.1.1(d).
“2015 Deferred Payment” and “2015 Deferred Payments” are defined in Section
2.1.2(d).
“Fifth Amendment Facility Charge” means Fifty Thousand Dollars ($50,000.00).
(b)    Section 2.1(d) of the Loan Agreement is amended by inserting the
following new provision to appear as subsection (iv) thereof:
(iv)    Notwithstanding the foregoing, provided that no Event of Default has
occurred or is continuing, the scheduled principal payments due on the first
calendar day of each month, for the three (3) consecutive months commencing on
August 1, 2017 through and including October 1, 2017 (each, a “Deferred Payment”
and collectively, the “Deferred Payments”) shall be deferred (not waived).
Borrower shall continue to make monthly payments of interest as set forth
herein. Commencing on November 1, 2017, and continuing on the first calendar day
of each month thereafter, Borrower shall repay the aggregate Term Loan Advances,
including the Deferred Payments, in equal monthly installments of principal and
interest (mortgage style) based upon an amortization schedule equal to
thirty-six (36) consecutive months. The entire principal balance of the Term
Loan Advances, including Deferred Payments and all accrued but unpaid interest
hereunder, and all other Secured Obligations with respect to the Term Loan
Advances, shall be due and payable on Term Loan Maturity Date.
(c)    Section 2.1.1(d) of the Loan Agreement is amended by inserting the
following new provision to appear as subsection (iv) thereof:

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(iv)    Notwithstanding the foregoing, provided that no Event of Default has
occurred or is continuing, the scheduled principal payments due on the first
calendar day of each month, for the three (3) consecutive months commencing on
August 1, 2017 through and including October 1, 2017 (each, a “2014 Deferred
Payment” and collectively, the “2014 Deferred Payments”) shall be deferred (not
waived). Borrower shall continue to make monthly payments of interest as set
forth herein. Commencing on November 1, 2017, and continuing on the first
calendar day of each month thereafter, Borrower shall repay the aggregate 2014
Term Loan Advances, including the 2014 Deferred Payments, in equal monthly
installments of principal and interest (mortgage style) based upon an
amortization schedule equal to thirty-six (36) consecutive months. The entire
principal balance of the 2014 Term Loan Advances, including 2014 Deferred
Payments and all accrued but unpaid interest hereunder, and all other Secured
Obligations with respect to the 2014 Term Loan Advances, shall be due and
payable on 2014 Term Loan Maturity Date.
(d)    Section 2.1.2(d) of the Loan Agreement is amended by inserting the
following new provision to appear as the second paragraph in subsection (d)
thereof:
Notwithstanding the foregoing, provided that no Event of Default has occurred or
is continuing, the scheduled principal payments due on the first calendar day of
each month, for the three (3) consecutive months commencing on August 1, 2017
through and including October 1, 2017 (each, a “2015 Deferred Payment” and
collectively, the “2015 Deferred Payments”) shall be deferred (not waived).
Borrower shall continue to make monthly payments of interest as set forth
herein. Commencing on November 1, 2017, and continuing on the first calendar day
of each month thereafter, Borrower shall repay the aggregate 2015 Term Loan
Advances, including the 2015 Deferred Payments, in equal monthly installments of
principal and interest (mortgage style) based upon an amortization schedule
equal to thirty-six (36) consecutive months. The entire principal balance of the
2015 Term Loan Advances, including 2015 Deferred Payments and all accrued but
unpaid interest hereunder, and all other Secured Obligations with respect to the
2015 Term Loan Advances, shall be due and payable on 2015 Term Loan Maturity
Date.             
    
3.    Conditions to Effectiveness. Lender and Borrower agree that this Amendment
shall become effective upon the satisfaction of the following conditions
precedent, each in form and substance satisfactory to Lender:
(a)Lender shall have received a fully-executed counterpart of this Amendment
signed by Borrower;
(b)Borrower shall have paid to Lender, for the account of Lender, the Fifth
Amendment Facility Charge which shall be deemed earned on the effective date of
this Amendment; and
(c)Agent shall have received payment for all reasonable and documented
out-of-pocket fees and expenses incurred by Lender and Agent in connection with
this Amendment, including, but not limited to, all legal fees and expenses,
payable pursuant to Section 11.11 of the Loan Agreement.
4.    Representations and Warranties. The Borrower hereby represents and
warrants to Lender as follows:
(d)Representations and Warranties in the Agreement. The representations and
warranties of Borrower set forth in Section 5 of the Loan Agreement are true and
correct in all material respects on and as of the date hereof, except to the
extent such representations and warranties expressly relate to an earlier date.
(e)Authority, Etc. The execution and delivery by Borrower of this Amendment and
the performance by Borrower of all of its agreements and obligations under the
Loan Agreement and the other Loan Documents, as amended hereby, are within the
corporate or limited liability company authority, as applicable, of Borrower and
have been duly authorized by all necessary corporate action on the part of
Borrower. With respect to Borrower, the execution and delivery by Borrower of
this Amendment does not and will not require any registration with, consent or
approval of, or notice to any Person (including any governmental authority).
(f)Enforceability of Obligations. This Amendment, the Loan Agreement and the
other Loan Documents, as amended hereby, constitute the legal, valid and binding
obligations of Borrower enforceable against Borrower in accordance with their
terms, except as enforceability is limited by bankruptcy, insolvency,
reorganization, moratorium, general equitable principles or other laws relating
to or affecting generally the enforcement of, creditors’ rights and except to
the extent that availability of the remedy of specific performance or injunctive
relief is subject to the discretion of the court before which any proceeding
therefor may be brought.
(g)No Default. Immediately after giving effect to this Amendment (i) no fact or
condition exists that would (or would, with the passage of time, the giving of
notice, or both) constitute an Event of Default, and (ii) no event that has had
or could reasonably be expected to have a Material Adverse Effect has occurred
and is continuing.
(h)Event of Default. By its signature below, Borrower hereby agrees that it
shall constitute an Event of Default if any representation or warranty made
herein should be false or misleading in any material respect when made.

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5.    Reaffirmations. Except as expressly provided in this Amendment, all of the
terms and conditions of the Loan Agreement and the other Loan Documents remain
in full force and effect. Nothing contained in this Amendment shall in any way
prejudice, impair or effect any rights or remedies of Lender under the Loan
Agreement and the other Loan Documents. Except as specifically amended hereby,
Borrower hereby ratifies, confirms, and reaffirms all covenants contained in the
Loan Agreement and the other Loan Documents. The Loan Agreement, together with
this Amendment, shall be read and construed as a single agreement. All
references in the Loan Documents to the Loan Agreement or any other Loan
Document shall hereafter refer to the Loan Agreement or such other Loan Document
as amended hereby.
6.    Execution in Counterparts. This Amendment may be executed in any number of
counterparts, each of which shall be deemed an original, but which together
shall constitute one instrument.
7.    Miscellaneous.
(a)    THIS AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED AND ENFORCED IN
ACCORDANCE WITH, THE LAWS OF THE STATE OF CALIFORNIA, EXCLUDING CONFLICT OF LAWS
PRINCIPLES THAT WOULD CAUSE THE APPLICATION OF LAWS OF ANY OTHER JURISDICTION.
(b)    The captions in this Amendment are for convenience of reference only and
shall not define or limit the provisions hereof.
(c)    This Amendment expresses the entire understanding of the parties with
respect to the transactions contemplated hereby. No prior negotiations or
discussions shall limit, modify, or otherwise affect the provisions hereof.
(d)    Any determination that any provision of this Amendment or any application
hereof is invalid, illegal or unenforceable in any respect and in any instance
shall not affect the validity, legality, or enforceability of such provision in
any other instance, or the validity, legality or enforceability of any other
provisions of this Amendment.

[Signature Pages to Follow.]

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IN WITNESS WHEREOF, Borrower, Agent and Lender have duly executed and delivered
this Amendment as of the day and year first above written.

BORROWER:

CTI BIOPHARMA CORP., formerly known as CELL THERAPEUTICS, INC.
Signature:    /s/ Bruce J. Seeley
Print Name:    Bruce J. Seeley
Title:        EVP, Chief Operating Officer

Accepted in Palo Alto, California:
LENDER:
HERCULES CAPITAL FUNDING TRUST 2014-1
Signature:    /s/ Zhuo Huang
Print Name:    Zhuo Huang
Title:        Associate General Counsel
HERCULES CAPITAL, INC.
Signature:    /s/ Zhuo Huang
Print Name:    Zhuo Huang
Title:        Associate General Counsel

AGENT:
HERCULES CAPITAL, INC.
Signature:    /s/ Zhuo Huang
Print Name:    Zhuo Huang
Title:        Associate General Counsel