Radiation Oncology

B

• Bone Metastases Palliation - Single Fraction 8 Gy

  Single-fraction external-beam radiation of 8 Gy is an evidence-based, convenient option for many uncomplicated painful bone metastases. Current ASTRO guidance recognizes 8 Gy in 1 fraction, 20 Gy in 5 fractions, 24 Gy in 6 fractions, and 30 Gy in 10 fractions as effective conventional regimens. Fractionation should be individualized for stability, spinal cord involvement, prior radiation, prognosis, treatment goals, and likelihood of retreatment.
• Brain Metastases - SRS Versus Whole Brain Selection

  Selection between stereotactic radiosurgery and whole-brain radiation for brain metastases depends on performance status, number and total volume of lesions, lesion size and location, symptoms, prior surgery, extracranial disease, prognosis, and availability of CNS-active systemic therapy. Modern practice favors focal SRS for many patients with limited intracranial disease because it preserves cognition, while WBRT remains important when disease is too extensive or diffuse for safe focal treatment.

C

• Cervical Cancer - Brachytherapy Principles

  Image-guided brachytherapy is a core component of definitive treatment for locally advanced cervical cancer because it delivers a very high dose to residual cervical tumor while rapidly reducing dose to bladder, rectum, sigmoid, and small bowel. It should be integrated with external-beam radiation and concurrent systemic therapy when appropriate, planned from current pelvic anatomy, and completed without unnecessary prolongation of overall treatment time.

E

• Early Stage Lung Cancer - SBRT Selection and Planning

  Stereotactic body radiation therapy is a standard definitive option for medically inoperable, node-negative early-stage non-small cell lung cancer and an important option for selected operable patients after multidisciplinary discussion. Safe SBRT requires accurate staging, motion management, reproducible immobilization, image guidance, and dose/fractionation tailored to tumor size and proximity to central airways, chest wall, brachial plexus, esophagus, heart, and other critical structures.

H

• Hemostatic Radiation - Control of Tumor Bleeding

  Hemostatic radiotherapy can rapidly reduce bleeding from many symptomatic tumors when local control by surgery, endoscopy, embolization, or systemic therapy is not feasible or would impose greater burden. Treatment is individualized to bleeding severity, anatomy, prognosis, prior radiation, and the need for fast symptom relief, with short palliative courses often preferred for patients with limited life expectancy.

M

• Malignant Spinal Cord Compression - Steroids Imaging and Radiation

  Back pain with new neurologic deficits in cancer should trigger emergent steroids and MRI; coordinate surgery versus urgent radiation based on stability and tumor factors.
• Mucositis in Head and Neck Radiation - Supportive Care

  Oral mucositis during head-and-neck radiation is a dose-limiting inflammatory injury of the oral and pharyngeal mucosa that causes pain, odynophagia, nutritional decline, dehydration, infection risk, and treatment interruption. Management combines standardized oral care, pain control, nutritional support, treatment of superimposed infection, and evidence-based preventive measures such as benzydamine or photobiomodulation in selected treatment settings.

P

• Prostate Cancer Radiation - Acute and Chronic Toxicity

  Radiation for localized prostate cancer commonly causes transient urinary and bowel irritation during treatment, while late effects can include persistent urinary symptoms, rectal bleeding, urethral stricture, erectile dysfunction, and uncommon severe tissue injury. Toxicity prevention begins with careful baseline assessment, reproducible bladder and rectal preparation, modern image-guided planning, medication review, and early treatment of symptoms while investigating red flags rather than automatically at

R

• Radiation Cystitis - Evaluation and Hematuria Management

  Radiation cystitis is a delayed bladder injury that can cause frequency, urgency, dysuria, reduced capacity, and recurrent gross hematuria months to years after pelvic radiotherapy. Evaluation must exclude infection, stones, recurrent or new malignancy, upper-tract bleeding, and anticoagulant-related amplification; management ranges from hydration and bladder irrigation to cystoscopic hemostasis, intravesical therapy, hyperbaric oxygen, embolization, and rarely urinary diversion.
• Radiation Dermatitis - Prevention and Skin Care

  Acute radiation dermatitis is a predictable inflammatory skin reaction that ranges from faint erythema and dryness to moist desquamation and, rarely, ulceration. Prevention now emphasizes gentle washing, moisturization, avoidance of friction and trauma, and evidence-based topical corticosteroids or barrier films in appropriate patients rather than keeping the treatment field dry or avoiding normal hygiene.
• Radiation Pneumonitis - Recognition and Steroid Management

  Radiation pneumonitis is an inflammatory lung injury that usually appears weeks to months after thoracic radiotherapy and is diagnosed by integrating symptoms, timing, radiation dose distribution, CT findings, and exclusion of infection, tumor progression, pulmonary embolism, heart failure, and drug-related pneumonitis. Mild asymptomatic disease may be observed, while symptomatic grade 2 or greater pneumonitis commonly requires systemic corticosteroids and a slow taper.
• Reirradiation - Cumulative Dose and Constraints

  Reirradiation can provide meaningful local control or symptom relief after a prior radiation course, but safety depends on reconstructing the original dose, understanding interval tissue recovery, converting doses to a comparable biologic scale when appropriate, and applying organ-specific cumulative constraints. The decision should balance expected benefit, alternative local therapies, prognosis, target overlap, prior toxicity, and the uncertainty inherent in dose summation.

S

• Simulation and Immobilization - CT Planning and Prep

  Radiation simulation converts a clinical treatment decision into a reproducible geometric plan. A planning CT should capture the patient in the treatment position with site-appropriate immobilization, contrast and organ preparation when useful, respiratory motion management when required, and complete documentation of setup, devices, allergies, renal risk, pregnancy status, and consent so the same anatomy can be recreated throughout treatment.
• Spine Metastases - SBRT Versus Conventional Factors

  Radiation for painful spine metastases ranges from conventional palliative schedules to stereotactic body radiation therapy. Selection depends on neurologic status, mechanical stability, epidural disease, prior radiation, prognosis, performance status, tumor radioresistance, target geometry, and proximity to the spinal cord or cauda equina; cord compression and instability require urgent multidisciplinary evaluation before an SBRT-versus-conventional decision.
• Superior Vena Cava Syndrome - Stenting Steroids and Radiation

  Assess airway and hemodynamics, obtain CT venography, prioritize endovascular stenting for rapid relief, and use radiation or systemic therapy for tumor control.