HER2-positive breast cancer with brain metastases: responding well to T-DXd

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

Biomarkers: ER-positive; PR-positive; HER2-positive / HER2 IHC 3+

Metastatic Site: brain (left cerebellum, left frontal lobe, medulla)

After 14 months and 19 doses of T-DXd, brain metastases remained controlled with no symptomatic or radiological relapse and no severe T-DXd-related adverse events.

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Facing Triple-Negative Breast Cancer: Chance’s Story

Patient Info: Chance, Female, Under 40 | Stage II

Biomarkers: ER-negative; PR-negative; HER2-negative; BRCA1 mutation

As of February 2025, Chance described follow-up after Stage II BRCA1-associated triple-negative breast cancer and stated that she did not currently have cancer, while continuing close surveillance.

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Stage III Triple-Negative Breast Cancer: Kelly's Survivor Story

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

Biomarkers: Triple-negative breast cancer; no inherited cancer gene mutation found.

As of February 2025, Kelly identified as a Stage IIIC triple-negative breast cancer survivor after neoadjuvant chemotherapy, double mastectomy with reconstruction, and radiation, and was using her experience to support others through TNBC Thrivers.

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Stage 4 hormone receptor-positive breast cancer: remission with PARP inhibitor

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

Biomarkers: HR-positive breast cancer with HER2-low/negative recurrence, and pathogenic BRCA2 R2318* mutation.

Metastatic Site: pleura

As of January 2025, she had maintained complete response for 36 months after sequential FEC/docetaxel and olaparib for hormone receptor-positive, HER2-negative/HER2-low metastatic breast cancer with BRCA2 R2318* mutation.

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Breast Cancer Recurring Years Later With Leptomeningeal Spread and a Brief Response to Trastuzumab Deruxtecan

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

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

Metastatic Site: peritoneum, retroperitoneum, bones, leptomeninges

Died on May 10, 2024, about 18 years after her April 2006 breast-cancer diagnosis and about 6 years after metastatic recurrence.

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Stage I ER-positive/HER2-positive breast cancer with radiation-associated morphea

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

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

No evidence of breast cancer recurrence after 2018 treatment; ongoing issue was generalized morphea and breast deformity related to prior radiation, improved with mycophenolate by April 2024.

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Stage III Breast Cancer Complicated by a Large Liver Abscess

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

Biomarkers: ER-positive, HER2-negative

Continuing adjuvant anastrozole and oncology follow-up after mastectomy for Stage III breast cancer.

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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 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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Breast Cancer Recurrence in the Small Intestine and Bone More Than 5 Years After Diagnosis

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

Biomarkers: Initial ER-positive, PR-positive, HER2-negative; metastatic lesion ER-negative, PR-negative, triple negative

Metastatic Site: small intestine, bone, right fallopian tube

More than 5 years after her December 2018 diagnosis, she was alive at 1-year follow-up after metastatic recurrence, with multiple bone metastases still present.

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Stage I Breast Cancer and a Separate Mixed Primary Liver Cancer in a 62-Year-Old Woman

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

Biomarkers: HER2/CerbB-2 positive

Postoperative pathology showed Stage I breast cancer, and the breast tumor did not progress.

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HER2-positive squamous cell breast cancer in complete remission

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

Biomarkers: HER2-positive squamous cell breast cancer, ER/PR negative, PD-L1 negative

Clinical complete remission and survival beyond 4 years after mastectomy, AC-TH chemotherapy, and HER2-directed maintenance therapy for Stage IIA HER2-positive primary squamous cell breast cancer.

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Breast invasive lobular carcinoma metastatic to the endometrium: hysterectomy and hormone therapy

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

Biomarkers: HER2 negative, PR/HER2 negative.

Metastatic Site: endometrium (endometrial polyp)

No signs of recurrence were reported 18 months after total hysterectomy with bilateral adnexectomy for endometrial metastasis from invasive lobular breast carcinoma, with scheduled follow-up every 3 to 6 months.

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Triple-negative breast cancer in remission after chemotherapy and pembrolizumab

Patient Info: Anonymized, Female, 50s

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

Triple-negative breast cancer was in remission, with PET-CT showing no new primary or secondary tumors, while pembrolizumab-related adrenal insufficiency required ongoing endocrine management.

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Invasive Ductal Carcinoma: Lauren's Survivor Story

Patient Info: Lauren O'Connell, Female

As of September 2024, Lauren had completed lumpectomy, chemotherapy, and 25 rounds of radiation. She described major emotional change and recovery, but no formal NED or cancer-free status was reported.

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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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Rare Triple-Negative Mucinous Cystadenocarcinoma of the Breast

Patient Info: Anonymized, Female, Under 40

Biomarkers: Triple-negative

At 6-month follow-up after treatment, she was alive and well.

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Triple-negative breast cancer: partial response to TAC chemotherapy

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

Biomarkers: Triple-negative breast cancer with EGFR positivity and high Ki-67; BRCA1 staining was positive by IHC.

After 1 cycle of TAC chemotherapy, the large ulcerated breast tumor shrank enough for surgery. Radical mastectomy with adjacent flap transfer achieved clear margins and no nodal metastatic cancer; she was recovering at home while awaiting planned postoperative AC-T chemotherapy.

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Stage 4 invasive ductal carcinoma: metastatic disease with bone involvement managed successfully

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

Biomarkers: ER <1%; PR 0%; HER2 score 3+; Ki-67 60%

Metastatic Site: bone (12th thoracic vertebra/T12)

Stage IV HER2-positive breast cancer had improved T12 bone metastasis, major breast-tumor regression on trastuzumab deruxtecan, and pathologic complete response in the breast after mastectomy; durable systemic disease status was not reported.

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Low-Grade Adenosquamous Breast Cancer With High-Grade Transformation

Patient Info: Anonymized, female, 50s

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

No tumor recurrence or metastasis was observed during follow-up after surgery and chemotherapy.

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Rare acinic cell breast cancer treated with mastectomy

Patient Info: Anonymized, Female, Under 40

Biomarkers: Triple-negative; pMMR/MSS; Ki-67 very high. TP53 and several other mutations reported; no gene fusion/rearrangement found.

Alive for 43 months with no metastasis or recurrence after surgery, 8 cycles of epirubicin/cyclophosphamide, and radiotherapy for breast acinic cell carcinoma with high-grade solid transformation.

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Stage II Breast Cancer Treatment Complicated by Scleroderma-Like Skin Changes

Patient Info: Anonymized, female, 50s | Stage II

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

Her cancer remained stable during combination treatment. After morphea-like skin changes developed during therapy, treatment was modified and the skin condition improved 6 months after docetaxel was stopped.

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Stage 3 breast cancer: pathologic complete response to neoadjuvant chemotherapy

Patient Info: Anonymized, Female, Under 40

Biomarkers: ER-positive, PR-negative, HER2-negative breast cancer with very high Ki-67. MammaPrint high-risk/basal type; hereditary testing negative.

Free of recurrence at last follow-up after neoadjuvant pembrolizumab plus chemotherapy, breast-conserving surgery with RCB-0/pathologic complete response, adjuvant radiation, and adjuvant pembrolizumab.

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Stage 2 triple-negative breast cancer: pathologic complete response to chemotherapy

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

Biomarkers: Triple-negative breast cancer, with pathogenic PALB2 c.1451T>A variant found in blood/buccal/tumor testing.

As of May 2024, more than 1 year after surgery, she was well and free of cancer after neoadjuvant chemotherapy, mastectomy, reconstruction, and preventive adnexectomy.

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