Swelling of the Prostate Gland by Permanent Brachytherapy May Affect Seed Migration.
Summary of "Swelling of the Prostate Gland by Permanent Brachytherapy May Affect Seed Migration."
The purpose was to monitor implanted seeds and to determine factors contributing to seed migration after permanent prostate brachytherapy.
Sixty-two consecutive patients with Stage 1 prostate cancer who underwent brachytherapy with (125)I seeds between February 2008 and May 2009 were studied prospectively. On post-operative days 1, 7 and 30, scintigraphy was added to conventional radiography to monitor the migration of the implanted seeds. The prostate volume was measured during the pre-planning stage using ultrasound and during the post-planning stage using computed tomography on post-operative days 0 and 30. Magnetic resonance imaging was performed on day 30.
Of the 4843 seeds implanted in the prostates of 62 patients, 108 seeds (2.2%) in 43 patients (69.4%) exhibited seed migration. Thirty-five seeds could not be identified using any of the imaging modalities and were likely passed during urination (0.7% of the total number of seeds). The maximum number of migrated seeds in one patient was 10 of the 85 implanted seeds. The fraction of patients with seed migration or loss increased from 27.4% on day 1 to 69.4% on day 30. The number of seeds that had migrated from the prostate increased from 48 (0.1% of the total number of seeds) on 1 day to 78 (1.0%) on day 7 and 108 (2.2%) on day 30. Of the seeds lost from the prostate, 38.9% embolized to the lungs. The seed loss during the first post-operative month was closely correlated with the swelling of the prostate gland between the pre-planning measurement and the post-planning measurement performed on day 0 (P < 0.0001).
Prostate swelling between the pre-planning and post-planning (day 0) measurements was significantly associated with seed migration, and adequate attention should be given to this issue.
1Department of Radiology, National Center for Global Health and Medicine.
This article was published in the following journal.
Name: Japanese journal of clinical oncology
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/20630898
- DOI: http://dx.doi.org/10.1093/jjco/hyq118
To explore patterns of time to failure in men receiving high doses of permanent seed brachytherapy with or without external beam radiation therapy as a function of risk status.
The lack of dynamic dosimetry tools for permanent prostate brachytherapy causes otherwise avoidable problems in prostate cancer patient care. The goal of this work is to satisfy this need in a readily...
Brachytherapy has been shown to be an efficacious and cost-effective treatment among patients with localized prostate cancer. In this study, the authors examined trends in brachytherapy use for locali...
To expand the radiation dose rate measurement data set by measuring radiation under various prostate (125)I brachytherapy situations.
Controversy exists whether the prostate-specific antigen (PSA) bounce phenomenon following definitive radiation for prostate cancer has prognostic significance. Here, we perform a meta-analysis to det...
Swelling of the prostate can occur during and after a brachytherapy. This swelling can cause urinary problems ranging from difficulty voiding to urinary retention. The purpose of this stud...
The primary goal of this project is to evaluate the efficacy of prostate seed implantation for the treatment of early stage prostate cancer for patients treated at Summa Health System/Akro...
Virtual high dose rate (HDR) CyberKnife (CK) prostate treatment has comparable morbidity and efficacy compared with actual prostate HDR treatment, but does it without the catheters and hos...
The purpose of this study is to see if botox injection into the prostate during seed implantation (brachytherapy) for prostate cancer a) improves urinary symptoms or avoids need for urinar...
Permanent prostate implants are a type of radiation therapy in which a high dose of radiation is delivered to cancerous tissue by many small radioactive "seeds". Studies of early-stage pr...
Medical and Biotech [MESH] Definitions
Proteins secreted by the prostate gland. The major secretory proteins from the human prostate gland include PROSTATE-SPECIFIC ANTIGEN, prostate-specific acid phosphatase, prostate-specific membrane antigen, and prostate-specific protein-94.
A glycoprotein that is a kallikrein-like serine proteinase and an esterase, produced by epithelial cells of both normal and malignant prostate tissue. It is an important marker for the diagnosis of prostate cancer.
A lactogenic hormone secreted by the adenohypophysis (PITUITARY GLAND, ANTERIOR). It is a polypeptide of approximately 23 kD. Besides its major action on lactation, in some species prolactin exerts effects on reproduction, maternal behavior, fat metabolism, immunomodulation and osmoregulation. Prolactin receptors are present in the mammary gland, hypothalamus, liver, ovary, testis, and prostate.
Phenomenon of cell-mediated immunity measured by in vitro inhibition of the migration or phagocytosis of antigen-stimulated LEUKOCYTES or MACROPHAGES. Specific CELL MIGRATION ASSAYS have been developed to estimate levels of migration inhibitory factors, immune reactivity against tumor-associated antigens, and immunosuppressive effects of infectious microorganisms.
Malignant neoplasms involving the ductal systems of any of a number of organs, such as the MAMMARY GLANDS, the PANCREAS, the PROSTATE, or the LACRIMAL GLAND.