Plus Therapeutics to Present New Analysis at ISPOR Showing CNSide® May Reduce Leptomeningeal Metastases Healthcare Costs by 40%
Rhea-AI Summary
Plus Therapeutics (Nasdaq: PSTV) will present a health economics analysis at ISPOR 2026 showing the CNSide CSF assay could cut leptomeningeal metastases (LM) healthcare costs by ~40% (range 33%–47%).
Key figures: median inpatient admissions ~$20,000 (IQR $10,000–$30,000) and LM costs may exceed $100,000 per month; findings support U.S. commercialization efforts.
Positive
- CNSide may reduce LM-related costs by ~40% (33%–47%)
- Median inpatient LM admission cost reported at ~$20,000 (IQR $10k–$30k)
- Analysis co-authored with Harvard T.H. Chan School of Public Health
Negative
- LM cost estimates show high variability and uncertainty (range and IQR)
- Analysis notes claims bundling with primary cancer obscures LM cost attribution
News Market Reaction – PSTV
On the day this news was published, PSTV gained 2.16%, reflecting a moderate positive market reaction. Our momentum scanner triggered 3 alerts that day, indicating moderate trading interest and price volatility. This price movement added approximately $953K to the company's valuation, bringing the market cap to $45M at that time.
Data tracked by StockTitan Argus on the day of publication.
Key Figures
Market Reality Check
Peers on Argus
PSTV fell 5.6% while several biotech peers like VRCA (-8.49%) and BRNS (-6.04%) also declined, with RNXT modestly higher (+1.98%). Momentum scanner flags only 1 peer moving up, supporting a stock-specific move.
Historical Context
| Date | Event | Sentiment | Move | Catalyst |
|---|---|---|---|---|
| Mar 12 | Earnings and outlook | Neutral | -15.2% | Reported 2025 results, stronger balance sheet, and 2026 milestones for REYOBIQ and CNSide. |
| Feb 25 | Reimbursement update | Positive | +7.6% | New Category III CPT code approved for convection‑enhanced delivery used with REYOBIQ. |
| Jan 22 | Business update | Neutral | -2.3% | Outlined REYOBIQ clinical progress, CNSide commercialization goals, and an upsized $15M offering. |
| Jan 21 | Conference call notice | Neutral | -2.3% | Announced timing and access details for a business update call and webcast. |
| Jan 14 | Public offering | Negative | -38.2% | Priced upsized $15M underwritten public offering of units with accompanying warrants. |
Dilutive financings drew sharp selloffs, while operational and commercialization updates have produced mixed, generally modest reactions.
Over recent months, Plus Therapeutics combined financings with CNS cancer pipeline and CNSide commercialization progress. A January $15 million public offering and related completion update were followed by business updates outlining 2026 milestones and CNSide coverage targets. February’s new CPT Category III code for REYOBIQ was one of the few events with a positive price reaction. The latest health economics data further supports CNSide’s value as U.S. commercialization advances.
Market Pulse Summary
This announcement highlights health economics data suggesting CNSide-enabled earlier LM detection may cut LM-related healthcare costs by about 40%, with median inpatient admissions near $20,000 and total LM costs potentially exceeding $100,000 per month. The data supports the assay’s clinical and economic rationale as U.S. commercialization progresses, complementing recent financings, coverage gains, and pipeline milestones in Plus Therapeutics’ broader CNS strategy.
Key Terms
leptomeningeal metastases medical
cerebrospinal fluid medical
health economics and outcomes research medical
quality-adjusted life years medical
health economics medical
cost-of-care analysis technical
AI-generated analysis. Not financial advice.
Health economics analysis highlights the economic burden of late-stage leptomeningeal metastases (LM) and the potential value of earlier diagnosis using CNSide as it enters U.S. commercialization
HOUSTON, March 19, 2026 (GLOBE NEWSWIRE) -- Plus Therapeutics, Inc. (Nasdaq: PSTV) (“Plus” or the “Company”), a healthcare company developing and commercializing precision diagnostics and radiopharmaceuticals for central nervous system (CNS) cancers, announces the presentation of a new health economics study evaluating the economic impact of earlier detection and therapeutic management of LM using the CNSide cerebrospinal fluid (CSF) assay. The cost-of-care analysis suggests that earlier LM diagnosis and therapeutic management enabled by CNSide may reduce overall LM-related healthcare costs by approximately
The data will be presented at the ISPOR 2026 Annual Meeting, the leading global scientific conference focused on health economics and outcomes research (HEOR), bringing together researchers, healthcare decision-makers, and payer stakeholders. The meeting will take place May 17-20, 2026, in Philadelphia, PA.
“CNSide’s ability to detect and monitor tumor cells in cerebrospinal fluid provides clinicians with actionable information earlier in the disease course,” said Russ Havranek, EVP, Commercial and Corporate Strategy of Plus Therapeutics. “Health economics data demonstrating potential cost savings and improved outcomes are increasingly important to payers and health systems evaluating adoption of advanced diagnostics.”
Presentation Highlights
The poster, titled, “Economic Impact of Earlier Detection and Therapeutic Management of Leptomeningeal Metastases Using CNSide: A Cost-of-Care Analysis,” co-authored by CNSide Diagnostics and Harvard T.H. Chan School of Public Health, will highlight the following:
- Late-stage LM diagnosis is associated with substantial healthcare costs, including median inpatient admissions of ~
$20,000 (Interquartile range (IQR)$10,000 -$30,000) - Total LM-related costs may exceed
$100,000 per month, driven by repeated imaging, LM-directed therapies, and palliative care - Earlier detection and treatment optimization enabled by CNSide may reduce overall LM-related healthcare costs by ~
40% (33% -47% ) - Potential savings are driven by earlier therapeutic intervention, improved treatment precision, reduced adverse events and hospitalizations, and gains in quality-adjusted life years (QALYs)
- The analysis also highlights the challenges of quantifying LM costs due to claims bundling with primary cancer treatment
The analysis utilized published literature, real-world data, and healthcare claims databases to estimate direct and indirect costs associated with late-stage LM diagnosis. Additional information on ISPOR 2026 and the presentation abstract can be found here.
About Leptomeningeal metastases
Leptomeningeal metastases (LM) are a rare but severe complication of advanced cancer, affecting the fluid-lined structures of the central nervous system. LM occurs in approximately
About REYOBIQ™ (rhenium Re186 obisbemeda)
REYOBIQ (rhenium Re186 obisbemeda) is a novel injectable radiotherapy specifically formulated to deliver direct targeted high dose radiation in CNS tumors in a safe, effective, and convenient manner to optimize patient outcomes. REYOBIQ has the potential to reduce off target risks and improve outcomes for CNS cancer patients, versus currently approved therapies, with a more targeted and potent radiation dose. Rhenium-186 is an ideal radioisotope for CNS therapeutic applications due to its short half-life, beta energy for destroying cancerous tissue, and gamma energy for real-time imaging. REYOBIQ is being evaluated for the treatment of recurrent glioblastoma, leptomeningeal metastases, and pediatric brain cancer in the ReSPECT-GBM, ReSPECT-LM, and ReSPECT-PBC clinical trials. ReSPECT-GBM is supported by an award from the National Cancer Institute (NCI), part of the U.S. National Institutes of Health (NIH), and ReSPECT-LM is funded by a three-year
About CNSide Diagnostics, LLC
CNSide Diagnostics, LLC is a wholly owned subsidiary of Plus Therapeutics, Inc. that develops and commercializes proprietary laboratory-developed tests, such as CNSide®, designed to identify tumor cells that have metastasized to the central nervous system in patients with carcinomas and melanomas. The CNSide® CSF Assay Platform enables quantitative analysis of the cerebrospinal fluid (CSF) that informs and improves the management of patients with leptomeningeal metastases.
About Plus Therapeutics
Headquartered in Houston, Texas, Plus Therapeutics, Inc. is a clinical-stage pharmaceutical company developing targeted radiotherapeutics for difficult-to-treat cancers of the central nervous system with the potential to enhance clinical outcomes. Combining image-guided local beta radiation and targeted drug delivery approaches, the Company is advancing a pipeline of product candidates with lead programs in leptomeningeal metastases (LM) and recurrent glioblastoma (GBM). The Company has built a supply chain through strategic partnerships that enable the development, manufacturing, and future potential commercialization of its products.
Forward-Looking Statements
This press release contains statements that may be deemed “forward-looking statements” within the meaning of U.S. securities laws. All statements in this press release other than statements of historical fact are forward-looking statements. These forward-looking statements may be identified by future verbs, as well as terms such as "expect," "anticipate" "intend," "believe," "estimate," "will," and similar expressions or the negatives thereof. Such statements are based upon certain assumptions and assessments made by management in light of their experience and their perception of historical trends, current conditions, expected future developments and other factors they believe to be appropriate. The forward-looking statements included in this press release could differ materially from those expressed or implied by these forward-looking statements because of risks, uncertainties, and other factors that include, but are not limited to, the following: expectations regarding the completion of the proposed offering; the Company's ability to successfully raise sufficient capital on reasonable terms or at all; available cash on hand and contractual and statutory limitations that could impair our ability to pay future dividends; our ability to complete our pre-clinical or clinical studies; and changes in local or national economic conditions. This list of risks, uncertainties, and other factors is not complete. Any or all forward-looking statements the Company makes may turn out to be wrong and can be affected by inaccurate assumptions the Company might make or by known or unknown risks, uncertainties, and other factors, including those identified in this press release. This list of risks, uncertainties, and other factors is not complete. Plus Therapeutics discusses some of these matters more fully, as well as certain risk factors that could affect Plus Therapeutics’ business, financial condition, results of operations, and prospects, in its reports filed with the SEC, including Plus Therapeutics’ annual report on Form 10-K for the fiscal year ended December 31, 2025, quarterly reports on Form 10-Q, and current reports on Form 8-K. These filings are available for review through the SEC’s website at www.sec.gov. Any or all forward-looking statements Plus Therapeutics makes may turn out to be wrong and can be affected by inaccurate assumptions Plus Therapeutics might make or by known or unknown risks, uncertainties, and other factors, including those identified in this press release. Accordingly, you should not place undue reliance on the forward-looking statements made in this press release, which speak only as of its date. There may be events in the future that the Company is unable to predict, or over which it has no control, and its business, financial condition, results of operations and prospects may change in the future. The Company assumes no responsibility to update or revise any forward-looking statements to reflect events, trends or circumstances after the date they are made unless the Company has an obligation under U.S. federal securities laws to do so.
Investor Contact
CORE IR
investor@plustherapeutics.com
FAQ
What did Plus Therapeutics (PSTV) report about CNSide cost savings at ISPOR 2026?
How large are typical LM healthcare costs cited in the CNSide analysis for PSTV?
When and where will Plus Therapeutics present the CNSide economic analysis (PSTV)?
What clinical cost metrics did the PSTV poster highlight about inpatient LM care?
How does the CNSide analysis affect Plus Therapeutics' U.S. commercialization plans (PSTV)?
