Denosumab for Breast Cancer: 8 Real Stories

Male breast cancer history complicated by suspected bone disease and later IgG-kappa multiple myeloma

Patient Info: Anonymized, Male, 60s | Stage I

Biomarkers: Breast cancer was ER/PR-positive and HER2-negative by FISH. Later workup showed IgG-kappa multiple myeloma with IgH rearrangement.

The patient achieved very good partial response after KBD and completed autologous hematopoietic stem cell transplantation with engraftment, but later died of a novel coronavirus infection.

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Metastatic HER2-positive breast cancer complicated by medication-related osteonecrosis of the jaw

Patient Info: Anonymized, Female, 60s | Stage IV

Biomarkers: HER2-positive breast cancer. Jaw workup focused on osteonecrosis

Metastatic Site: bone / osseous metastasis

The case focused on metastatic HER2-positive breast cancer complicated by medication-related osteonecrosis of the jaw after antiresorptive therapy; dental pain improved transiently after oral-surgery interventions, but systemic cancer response was not described.

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Stage 4 lobular breast cancer: bone therapy switch to denosumab

Patient Info: Anonymized, Female, 40s | Stage IV

Biomarkers: Not reported for breast cancer; CRP 21 mg/dL and ESR 27 mm/hr were elevated during orbital inflammation workup

Metastatic Site: bone

As of April 2024, zoledronate-associated ocular inflammation resolved within 2.5 weeks, vision returned to 20/20 after about 3 weeks, and bone-support treatment was changed to denosumab; breast-cancer response was not reported.

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Metastatic Breast Cancer With Recurrent Severe Hypocalcemia During Treatment - Case 1

Patient Info: Anonymized, female, Under 40 | Stage IV

Biomarkers: ER-positive; PR-positive; HER2-negative

Metastatic Site: bone, liver, ovaries

She died about 9 years after her breast-cancer diagnosis after progression of liver metastases.

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HER2-Positive Metastatic Breast Cancer With Recurrent Severe Hypocalcemia - Case 2

Patient Info: Anonymized, female, 60s | Stage IV

Biomarkers: ER-positive; PR-positive; HER2-positive

Metastatic Site: bone, liver

She died about 7 years after her breast-cancer diagnosis after rapid deterioration from liver metastases.

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Metastatic ER-positive breast cancer complicated by osteonecrosis of the jaw

Patient Info: Anonymized, Female, 70+ | Stage IV

Biomarkers: ER-positive.

Metastatic Site: bone (sternum, spine, pelvis, and proximal femur)

After progressive metastatic bone disease and severe medication-related osteonecrosis of the jaw, she entered end-of-life care and died three weeks after discharge to a nursing home.

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Lobular Breast Cancer Spreading to an Eye Muscle

Patient Info: Anonymized, Female, 40s | Stage Metastatic/Advanced

Biomarkers: Hormone receptor-positive; HER2-negative; E-cadherin-negative; CK7-positive

Metastatic Site: bones|left superior oblique eye muscle

The eye-muscle metastasis entered complete local remission, while bone disease was stable after 6 months of weekly paclitaxel and denosumab.

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Breast cancer recurrence presenting with numb chin syndrome

Patient Info: Anonymized, Female, 50s | Stage IV

Metastatic Site: sternum, left mandibular foramen

She was discharged ambulatory without lower-limb pain, although left mandibular numbness persisted, with monthly oncology follow-up planned.

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