Stemline Therapeutics to Present SL-401 Updated Data from Stage 1 and 2 of Ongoing Pivotal Phase 2 BPDCN Trial at Upcoming European Hematology Association (EHA) Meeting

NEW YORK, May 18, 2017 (GLOBE NEWSWIRE) — Stemline Therapeutics, Inc. (Nasdaq:STML), a clinical-stage biopharmaceutical company developing novel therapeutics for oncology indications of unmet medical need, announced today that SL-401 Stage 1 and 2 data from its ongoing pivotal Phase 2 trial in blastic plasmacytoid dendritic cell neoplasm (BPDCN) has been accepted for poster presentation at the 2017 European Hematology Association (EHA) Annual Meeting, to be held June 22-25, 2017 in Madrid, Spain.

Details on the presentation is as follows:

SL-401 – BPDCN Presentation
Title:   Ongoing Phase 2 Clinical Trial Of SL-401 In Patients With Blastic Plasmacytoid Dendritic Cell Neoplasm (BPDCN): Stage 1 And Stage 2 Results
Presenter:   Naveen Pemmaraju, MD; MD Anderson Cancer Center
Abstract:   P191 
Session:    Acute myeloid leukemia – Clinical 1
Date/Time:   Friday, June 23 – 5:15-6:45 PM CET
Location:     Hall 7 – Poster Area

Stemline remains on track to provide an update on BPDCN patients enrolled in Stage 3 of the Phase 2 pivotal trial in the second half of this year.

About Stemline Therapeutics
Stemline Therapeutics, Inc. is a clinical stage biopharmaceutical company developing novel therapeutics for oncology indications of unmet medical need. A Phase 2 pivotal trial with SL-401, a targeted therapy directed to the interleukin-3 receptor (CD123), has completed enrollment of patients with blastic plasmacytoid dendritic cell neoplasm (BPDCN) in the Stage 3 cohort, and patients continue to be followed. SL-401 has been granted Breakthrough Therapy Designation (BTD) for the treatment of BPDCN. Additional Phase 1/2 trials with SL-401 are enrolling patients with other malignancies including high-risk myeloproliferative neoplasms (MPN) and acute myeloid leukemia (AML) in remission with minimal residual disease (MRD). A Phase 1/2 trial of SL-401 in combination with pomalidomide is enrolling patients with relapsed/refractory multiple myeloma. A Phase 1 dose escalation trial with SL-801, a novel oral small molecule reversible inhibitor of XPO1, is enrolling patients with advanced solid tumors. A Phase 2 trial with SL-701, an immunotherapy designed to activate the immune system to attack tumors, has completed dosing and patients with second-line glioblastoma are being followed for survival.

Forward-Looking Statements
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CONTACT: Contact
Investor Relations
Stemline Therapeutics, Inc.
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Tel: 646-502-2307