EXHIBIT 5.1

                                 [GS Letterhead]

                                                                    May 25, 2007


Delcath Systems, Inc.
1100 Summer Street
Stamford, CT  06905

Gentlemen:

We have acted as counsel to Delcath Systems, Inc. (the "Company") in connection
with its filing of a registration statement on Form S-3 (Registration No.
333-_______, the "Registration Statement") relating to the issuance from time to
time of an indeterminate amount of: (a) common stock, $.01 par value per share;
(b) preferred stock, $.01 par value per shares; (c) debt securities; (d)
warrants to purchase common stock; (e) warrants to purchase preferred stock; (f)
warrants to purchase debt securities; (g) stock purchase contracts; and (h)
stock purchase units (collectively, the "Securities"), which Securities the
Company is registering in such number or amount as is authorized and reserved by
the Board of Directors of the Company, as may be amended from time to time (but
not to exceed an aggregate issuance price of $30,000,000).

In our capacity as counsel to the Company, a Delaware corporation, we have
examined the Company's Certificate of Incorporation and By-laws, as amended to
date, and the minutes and other corporate proceedings of the Company.

With respect to factual matters, we have relied upon statements and certificates
of officers of the Company. We have also reviewed such other matters of law and
examined and relied upon such other documents, records and certificates as we
have deemed relevant hereto. In all such examinations we have assumed conformity
with the original documents of all documents submitted to us as conformed or
photostatic copies, the authenticity of all documents submitted to us as
originals and the genuineness of all signatures on all documents submitted to
us.

On the basis of the foregoing, we are of the opinion that:

The Securities covered by this Registration Statement have been validly
authorized and will when sold as contemplated by the Registration Statement, be
legally issued, fully paid and non-assessable.

This opinion opines upon Delaware law including the Delaware constitution, all
applicable provisions of the statutory provisions, and reported judicial
decisions interpreting those laws.



We hereby consent to the filing of this opinion as an exhibit to the
Registration Statement and to the reference made to us under the caption "Legal
Matters" in the prospectus constituting the Registration Statement.


                  Very truly yours,



                  /s/ Gersten Savage LLP
                  --------------------------
                  Gersten Savage LLP