DW26HZZ
Stereotactic Radiosurgery Pelvic Region to None with None, Stereotactic Particulate Radiosurgery Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | D Radiation Therapy |
| Body System | W Anatomical Regions |
| Operation | 2 Stereotactic Radiosurgery |
| Body Part | 6 Pelvic Region |
| Approach | H Stereotactic Particulate Radiosurgery |
| Device | Z None |
| Qualifier | Z None |
Procedure Overview
This family covers stereotactic radiosurgery and stereotactic body radiotherapy delivered to an anatomical region, using highly focused, image-guided beams to deliver a large radiation dose in one or a few sessions. Unlike conventional external beam therapy spread over many weeks, this technique relies on precise targeting technology to concentrate dose on the treatment area while sharply limiting exposure to nearby tissue.
It's typically chosen for tumors or lesions in a region where high precision is needed to protect adjacent structures, or for small, well-defined targets that respond well to a short, intense course of treatment. Because the technique demands tight positioning accuracy, patients are usually immobilized during simulation and treatment, and the plan is built from detailed imaging obtained shortly before each session.
Anatomy & Axis Detail
Pelvic Region
Stereotactic radiosurgery to the pelvic region targets structures such as prostate tissue, gynecologic tumors, or isolated bony or nodal metastases within the bony pelvis, delivered with the same ablative, image-guided precision used elsewhere in the body but adapted to pelvic anatomy. Bladder and rectal filling can shift target position from day to day, so many protocols require a consistent bladder-filling or rectal-emptying regimen and use fiducial markers or endorectal balloons to stabilize the target and confirm alignment before each fraction. The proximity of the bladder, rectum, femoral heads, and bowel loops means dose constraints for these organs at risk heavily shape the treatment plan. This approach is frequently used for oligometastatic pelvic disease or as a boost technique when sparing nearby pelvic organs is a priority.
Modality Qualifier: Stereotactic Particulate Radiosurgery
Stereotactic Particulate Radiosurgery refers to single- or limited-fraction radiosurgical treatment delivered with charged particle beams, such as protons, using stereotactic targeting to achieve sharp dose falloff around a small lesion. Its particle physics gives it a different depth-dose profile than the photon-based stereotactic techniques, making it useful when sparing tissue just beyond the target is a priority, unlike Stereotactic Other Photon Radiosurgery or Gamma Beam approaches.
Coding & Documentation
Coding requires the treatment note to specify that stereotactic technique, rather than conventional beam radiation, was used, including the region treated and the number of fractions delivered, since a very small number of high-dose sessions is a hallmark of this approach. Documentation from the treatment planning and delivery records, including reference to the stereotactic guidance system, supports the code. A common error is assigning standard Beam Radiation when the note actually describes stereotactic delivery, or the reverse, mistaking a hypofractionated conventional course for stereotactic treatment because both involve fewer sessions than typical.
Commonly Confused With
This is most often confused with standard Beam Radiation to the same anatomical region; the deciding factor is documentation of stereotactic guidance and a markedly shortened, high-dose fractionation schedule. It can also be confused with Stereotactic Radiosurgery coded to a specific organ system, such as Central Nervous System, when the note actually names a single organ rather than a broader anatomical region, in which case the organ-specific body system applies instead.