Feasibility of Holmium-166 Micro Brachytherapy in Head and Neck Tumors

2016-11-30 15:45:47 | BioPortfolio


The main objective is to establish the feasibility of 166-Holmium microspheres for intratumoral injections in oral squamous cell carcinoma (OSCC) of the tongue.

Participants will receive intratumoral injections with a low radioactive 166-Holmium microspheres followed by surgical resection


166-Holmium microspheres poly lactic acid microspheres are currently used in selective internal radiation therapy. These microspheres emits beta radiation. The majority of the radiation dose will be absorbed within 3.2 mm with a maximum penetration in tissue of 9 mm. Therefore this can result in a high local tumor ablative dose with minimal dose to healthy adjacent tissue.

Study Design

Endpoint Classification: Safety Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment




Holmium-166 (poly L lactic acid) microspheres


University Medical Center Utrecht
3584 CX




UMC Utrecht

Results (where available)

View Results


Published on BioPortfolio: 2016-11-30T15:45:47-0500

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Medical and Biotech [MESH] Definitions

Small uniformly-sized spherical particles, of micrometer dimensions, frequently labeled with radioisotopes or various reagents acting as tags or markers.

Holmium. An element of the rare earth family of metals. It has the atomic symbol Ho, atomic number 67, and atomic weight 164.93.

A species of gram-positive, rod-shaped LACTIC ACID bacteria that is frequently used as starter culture in SILAGE fermentation, sourdough, and lactic-acid-fermented types of beer and wine.

A poly(A) binding protein that is involved in promoting the extension of the poly A tails of MRNA. The protein requires a minimum of ten ADENOSINE nucleotides in order for binding to mRNA. Once bound it works in conjunction with CLEAVAGE AND POLYADENYLATION SPECIFICITY FACTOR to stimulate the rate of poly A synthesis by POLY A POLYMERASE. Once poly-A tails reach around 250 nucleotides in length poly(A) binding protein II no longer stimulates POLYADENYLATION. Mutations within a GCG repeat region in the gene for poly(A) binding protein II have been shown to cause the disease MUSCULAR DYSTROPHY, OCULOPHARYNGEAL.

Acidosis caused by accumulation of lactic acid more rapidly than it can be metabolized. It may occur spontaneously or in association with diseases such as diabetes mellitus, leukemia, or liver failure.

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