HER2-low lobular breast cancer with bone marrow involvement treated with T-DXd

Patient Info: Anonymized, Female | Stage IV

Biomarkers: Initial surgical specimen: ER-positive; PR-negative; HER2-negative. Bone marrow relapse: breast cancer infiltration with low HER2 staining.

Metastatic Site: bone marrow

Two years after starting T-DXd, this patient remained free of bone marrow disease and continued the same treatment regimen.

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Metastatic ER-positive pleomorphic lobular breast cancer: psoas metastasis and stable disease on eribulin

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

Biomarkers: Primary and chest-wall recurrence were ER/PR positive, HER2 negative. Later psoas metastasis was ER positive, PR/HER2 negative.

Metastatic Site: skin of left chest wall; bone; left psoas muscle;…

As of May 2025, one year after diagnosis of malignant psoas syndrome from breast cancer metastasis, she remained on outpatient treatment with eribulin and had stable disease.

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Stage IV HR-Positive Invasive Ductal Carcinoma: Samantha's Patient Story

Patient Info: Samantha, Female, Under 40 | Stage IV

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

Metastatic Site: Rib; spine; pelvis

After a mixed response on the radium trial, Samantha changed to anastrozole and abemaciclib. She described the newer hormone-targeted combination as easier to tolerate and working better while remaining in ongoing treatment.

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Early-stage triple-negative breast cancer with separate lung carcinoid and later CML

Patient Info: Anonymized, Female, 50s

Biomarkers: triple negative

As of May 2025, serial follow-up breast ultrasound examinations showed no evidence of breast cancer recurrence in either breast tissue or axillary lymph nodes.

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Stage IIA ER-positive breast cancer with axillary tuberculosis: no metabolically active disease after treatment

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

Biomarkers: ER 78% positive; PR-negative; HER2/neu-negative; Ki-67 21%; Luminal A subtype

As of April 2025, follow-up PET-CT showed no metabolically active disease after mastectomy, adjuvant anthracycline-based chemotherapy, letrozole, and 6 months of anti-tuberculosis therapy.

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Stage 0 Invasive Lobular Carcinoma: Kathleen's Survivor Story

Patient Info: Kathleen, Female | Stage 0

Kathleen completed surgery-focused treatment for DCIS with a very small invasive lobular component. No chemotherapy was needed, endocrine therapy was discussed but not required, and she continued imaging surveillance and advocacy in the flat community.

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Breast cancer linked to a rare kidney condition believed to be cancer-related

Patient Info: Anonymized, Female, 50s

Biomarkers: ER-positive; PR-positive; HER2 score 1+; Ki-67 5-10%

At the latest follow-up, she had no local or distant breast-cancer recurrence and maintained excellent performance status.

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Breast cancer history: atypical pelvic fracture after long-term zoledronic acid

Patient Info: Anonymized, Female, 60s | Stage Metastatic/Advanced

Prior breast cancer treatment had been completed; CT during fracture evaluation showed no metastatic disease, and the atypical iliac wing fracture healed progressively with conservative care and teriparatide.

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Stage III HR-Positive Invasive Lobular Carcinoma: Katie's Patient Story

Patient Info: Katie, Female, Under 40 | Stage III

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

As of February 2025, Katie was a few months beyond active treatment for Stage III ER-positive, PR-positive, HER2-negative ILC and was adjusting to maintenance therapy with Verzenio, Lupron, and Letrozole.

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Metastatic Breast Cancer Returning About 20 Years After Initial Treatment

Patient Info: Anonymized, Female | Stage IV

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

Metastatic Site: bones

About 20 years after her original breast-cancer treatment and sustained remission, bone biopsy confirmed metastatic recurrence; she became too unwell for planned cancer therapy and chose supportive care.

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HER2-Positive Breast Cancer With Metastatic Progression and Drug-Induced Lupus During T-DM1

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

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

Metastatic Site: bones, axillary lymph nodes, intra-abdominal lymph…

More than 5 years after her March 2018 diagnosis, she was living with metastatic breast cancer, but T-DM1 had been stopped after disease progression in 2023.

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Metastatic breast cancer with receptor evolution: sequential endocrine, immunotherapy, CDK4/6, and antibody-drug conjugate treatment

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

Biomarkers: Markers changed over time: initial tumor ER-positive/HER2-negative; local recurrence triple-negative/HER2-low; pleural fluid ER-negative.

Metastatic Site: mediastinal lymph nodes, pleura; pulmonary nodules…

More than 7 years after diagnosis, she remained on sequential systemic therapy for metastatic breast cancer, with at least a partial response 3 months after starting sacituzumab govitecan for presumed triple-negative pleural disease.

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Stage IV luminal B HER2-negative breast cancer with liver-limited metastasis resected after systemic therapy

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

Biomarkers: Luminal B; HER2-negative

Metastatic Site: liver

After liver segmentectomy for breast-cancer liver metastasis, follow-up imaging showed no remaining liver nodes, and she remained fit, well, disease-free, and on maintenance letrozole plus goserelin.

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Stage IV luminal A breast cancer: liver resection and disease-free follow-up

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

Biomarkers: luminal A; ER-positive; PgR-positive; HER2-negative

Metastatic Site: lung, liver

Disease-free after R0 hepatic segmentectomy for breast cancer liver metastasis, with May 2021 MRI showing no remaining liver nodules while she continued maintenance letrozole and goserelin.

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Stage 4 HR-positive breast cancer: stable disease on ribociclib

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

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

Metastatic Site: left iliac bone

Metastatic HR-positive, HER2-negative breast cancer remained without progression as of October 2024 while she continued ribociclib 400 mg plus letrozole after SBRT to a left iliac bone metastasis.

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Stage IV luminal B breast cancer with liver, bone, and bone marrow metastases

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

Biomarkers: ER 90% positive; PR 20% positive; HER2-negative; Ki-67 60%; luminal B

Metastatic Site: liver, bone, bone marrow

The patient had marked clinical and hematologic improvement on leuprorelin, letrozole, ribociclib, and zoledronic acid, with sustained complete remission reported for 4 months from September to December 2023 and monthly follow-up advised.

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Breast Cancer and a Separate Intrahepatic Cholangiocarcinoma in a 35-Year-Old Woman

Patient Info: Anonymized, Female, Under 40

Biomarkers: ER-positive, PR-positive, HER2/CerbB-2 positive

Breast-cancer care continued with postoperative endocrine maintenance while a separate primary intrahepatic cholangiocarcinoma required additional treatment.

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Stage IIIA HR-positive HER2-negative breast cancer with radiation-induced brachial plexopathy

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

Biomarkers: HR-positive/HER2-negative breast cancer with pathogenic ATM and PALB2 variants plus an ATM VUS.

Approximately 3.5 years after radiation therapy, there was no evidence of breast cancer recurrence, but severe radiation-induced brachial plexopathy, fibrosis, telangiectasias, and lymphedema-related symptoms required ongoing supportive care.

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Metastatic Male Breast Cancer Responding to Abemaciclib and Letrozole

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

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

Metastatic Site: soft tissue, distant lymph nodes, bone

The tumor and metastatic soft-tissue and lymph-node disease shrank markedly, with no progression on July 2024 imaging and good clinical condition in September 2024.

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Severe Corneal Injury After Trastuzumab for Metastatic HER2-Positive Breast Cancer

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

Biomarkers: ER-positive, PR-positive, HER2-positive

Metastatic Site: lungs, spine, left adrenal gland, calvarium, orbit,…

She was living with widespread metastatic breast cancer when trastuzumab was stopped because of severe eye toxicity.

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Stage IV HER2-Positive Invasive Ductal Carcinoma: Dee's Patient Story

Patient Info: Dee Doherty, Female, Under 40 | Stage IV

Biomarkers: Hormone-sensitive disease implied by letrozole and ovarian suppression; ER/PR/HER2 status not explicitly stated

Metastatic Site: bone

As of September 2024, Dee was living with Stage IV metastatic breast cancer. Her tumors had not shrunk, but disease was stable on ribociclib/Kisqali, letrozole, and ovarian suppression.

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Stage 4 breast cancer: complete remission with letrozole and palbociclib

Patient Info: Anonymized, Female | Stage IV

Biomarkers: Breast cancer was ER/PR positive, HER2 0

Metastatic Site: pleura/pleural effusion

Breast cancer remained in remission on letrozole after palbociclib was stopped; Ph-positive B-ALL achieved complete response with no molecular residual disease after blinatumomab plus ponatinib, with ongoing monthly outpatient monitoring.

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Stage 4 breast cancer: ongoing treatment with multi-line chemotherapy

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

Biomarkers: Initial tumor: hormone receptor-negative; HER2 2+. 2011 recurrence: ER 10%; PR 70%; HER2 2+.

Metastatic Site: pleura/pleural effusion; lung

Metastatic breast cancer with malignant pleural effusion achieved complete response after chemotherapy and long-term endocrine therapy; PET-CT in October 2023 still showed complete response, with ongoing cardiac and bone-health management.

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HR-positive HER2-negative metastatic breast cancer: bone metastases managed with sequential endocrine therapy

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

Biomarkers: ER 90%+, PR 80%+, HER2-. CA 15-3 was tracked during treatment.

Metastatic Site: skull base; spine; sternum; ribs; left iliac bone;…

Metastatic HR-positive, HER2-negative breast cancer remained under active management; after earlier progression, palbociclib plus fulvestrant and zoledronic acid produced stable/remission findings on PET/CT at 3 months and again 1 year later, with continued 3-month follow-up recommended.

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