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TheraSphere Yttrium-90 Glass Microspheres

Phase 3

Inoperable Hepatocellular Carcinoma | Small molecule | Oncology |Boston Scientific Corporation|Trials Updated: Aug 12, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedACTIVE_CONTROLLED
Total Trials1
Total Enrollment92

FDA Designations

No designations recorded

TheraSphere Yttrium-90 Glass Microspheres clinical trials

TheraSphere Yttrium-90 Glass Microspheres · 1 trial · 1 indication

Phase 3 1
NCT05016245MANDARIN (S6371)Inoperable Hepatocellular Carcinoma
COMPLETED92 Analytics
PHASE3COMPLETED
MANDARIN (S6371)
Inoperable Hepatocellular CarcinomaUnlock trial analytics

Study Endpoints

Primary Endpoints

Time to progression (TTP)
through study completion, an average of 18 months

Time to progression (TTP) Definition of progression: Progressive Disease (PD) assessment occurs according to mRECIST occurs according to mRECIST

Safety assessed within 60 days post treatment using NCI-CTCAE v5.0
within 60 days post treatment

Secondary Endpoints

Hepatic time to progression (hTTP) determined by localized mRECIST (within the treated area)
through study completion, an average of 18 months
Objective response rate (ORR) of the index lesion according to localized mRECIST (within the treatment area)
through study completion, an average of 18 months
Confirmed ORR according to mRECIST
through study completion, an average of 18 months
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
TheraSphere™ Yttrium-90 Glass MicrospheresEXPERIMENTAL -
conventional Transarterial Chemoembolization(cTACE)ACTIVE_COMPARATOR -

Interventions

NameTypeDescription
TheraSphere™ Yttrium-90 Glass MicrospheresCOMBINATION_PRODUCTTheraSphere™ Yttrium-90 Glass Microspheres TheraSphere™ is steam sterilized and supplied in 6 standard dose sizes: 3 GBq, 5 GBq, 7 GBq, 10 GBq, 15 GBq, 20 GBq. Custom dose sizes are also available in 0.5 GBq increments between 3 and 20 GBq. TheraSphereTM is supplied with the following accessories: Administration Set Administration Accessory Kit
conventional Transarterial Chemoembolization(cTACE)PROCEDUREconventional Transarterial Chemoembolization(cTACE) is comprised of an anti-neoplastic agent(s) (i.e. cisplatin), lipiodol and embolic agent(s). The choice of agent(s) to be used is per usual local site practice. Chemotherapy agents can be as a single agent or used in combination, as per local practice.
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Eligibility Criteria

Age Range18 Years to 80 Years
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * ≥18 and ≤80 age and provided study consent * Patients diagnosed with HCC and clinically evaluated as inoperable (as per local practice) or who refuse operation (ablation, hepatectomy and liver transplantation) * At least one well defined HCC tumor measurable by mRECIST in cont...

Countries:China
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Recent Changes (Last 90 Days)

MEDIUMSep 12, 2026NCT05016245TRIAL_REMOVED: changed
MEDIUMSep 12, 2026NCT05016245TRIAL_REMOVED: changed
MEDIUMSep 12, 2026NCT05016245TRIAL_REMOVED: changed
MEDIUMSep 12, 2026NCT05016245TRIAL_REMOVED: changed
HIGHAug 12, 2026NCT05016245Status: ACTIVE_NOT_RECRUITING → COMPLETED
HIGHAug 12, 2026NCT05016245Status: ACTIVE_NOT_RECRUITING → COMPLETED

Frequently asked questions about TheraSphere Yttrium-90 Glass Microspheres

What is TheraSphere Yttrium-90 Glass Microspheres used for?

TheraSphere Yttrium-90 Glass Microspheres is used to treat inoperable hepatocellular carcinoma, a form of liver cancer that cannot be removed with surgery. It is a liver-directed therapy being studied in a Phase 3 clinical program for this indication.

Who makes TheraSphere Yttrium-90 Glass Microspheres?

TheraSphere Yttrium-90 Glass Microspheres is developed by Boston Scientific Corporation, which trades on the New York Stock Exchange under the ticker BSX. The company is responsible for the clinical development of the product.

What phase is TheraSphere Yttrium-90 Glass Microspheres in?

TheraSphere Yttrium-90 Glass Microspheres is in Phase 3 clinical development. It is an investigational product and has not been approved by the FDA for the studied indication. The Phase 3 trial has been completed.

What clinical trials is TheraSphere Yttrium-90 Glass Microspheres in?

TheraSphere Yttrium-90 Glass Microspheres has been studied in the Phase 3 MANDARIN (S6371) trial, registered as NCT05016245. The trial enrolled 92 participants with inoperable hepatocellular carcinoma in China and has been completed.

Is TheraSphere Yttrium-90 Glass Microspheres the same as TheraSphere?

Yes, TheraSphere Yttrium-90 Glass Microspheres is also known as TheraSphere. The full name includes the trademark symbol and describes the yttrium-90 glass microsphere composition. Both names refer to the same product developed by Boston Scientific.