Hormone Therapy for ER Positive Breast Cancer: 136 Real Stories

Stage 2 breast cancer: lump discovered at 61, successful treatment

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

Biomarkers: Breast neuroendocrine tumor was ER/PR strongly positive, HER2 1+

Metastatic Site: lung, mediastinal lymph nodes, bone (ribs, spine,…

After Stage IIA primary breast neuroendocrine tumor treated with lumpectomy, sentinel lymph-node biopsy, radiation, and short-duration anastrozole, the patient developed metastatic recurrence about 2 years later, declined additional therapy, entered hospice, and died 1 month later.

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Glycogen-rich clear cell breast carcinoma: HER2-positive early-stage case with disease-free follow-up

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

Biomarkers: ER-positive; HER2-positive; PR-negative; Ki-67 ~10%; intracytoplasmic glycogen confirmed

At 1-year follow-up, she had no evidence of breast cancer recurrence.

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Stage IV ER/PR-positive breast cancer with retinal vein and artery occlusion during endocrine-targeted therapy

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

Biomarkers: ER 70%; PR 100%; HER2-negative; Ki-67 10%

Metastatic Site: bone (cranial vault, right first rib, sternum, D5, D6,…

As of November 2025, she continued care for Stage IV ER/PR-positive breast cancer with bone metastases while also managing severe left-eye retinal vascular occlusion and limited visual recovery.

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Invasive lobular breast cancer with dense lymphocytic infiltration treated with surgery, radiation, chemotherapy, and endocrine therapy

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

Biomarkers: ER-positive/PR-negative, HER2 1+ lobular breast cancer; Ki-67 35%

At 1 year after surgery, the patient remained recurrence-free while receiving postmenopausal aromatase inhibitor endocrine therapy.

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Stage IIIC ER-positive male breast cancer: mastectomy, chemotherapy, radiation, tamoxifen and abemaciclib

Patient Info: Anonymized, Male, 40s | Stage III

Biomarkers: ER 90% positive; PR 60% positive; HER2 score 0; Ki-67 15%; BRCA1 and BRCA2 no pathogenic variants; CEA 2.4 ng/mL; CA15-3 13.6 U/mL

He remained on tamoxifen and dose-adjusted abemaciclib; annual follow-up imaging, including non-contrast CT, showed no local or distant relapse.

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Stage IIA ER/PR-positive mucinous breast cancer: tamoxifen plus cryoablation with no recurrence

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

Biomarkers: ER/PR strongly positive, HER2 negative; CA15-3 and CEA remained normal during follow-up.

At approximately 32 months after cryoablation, the treated area had decreased to a less distinct 0.7 cm scar-like region, with no evidence of recurrence in either breast, axillae, or distant sites.

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Stage I ER-positive PR-negative breast cancer: disease-free after lumpectomy, radiation and tamoxifen

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

Biomarkers: ER 2+ in 60% of tumor cells; PR-negative; HER2/neu-negative; Ki-67 5%; 0/6 lymph nodes positive

At 15 months after surgery, she was disease-free, had no complaints, and was satisfied with the surgical result.

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ER/PR/HER2-positive breast cancer: gallbladder, liver, lung, pleural, and bone metastases after incomplete adjuvant therapy

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

Biomarkers: Triple-positive breast cancer. Gallbladder metastasis kept ER/PR/HER2 positivity and Ki-67 >40%; markers supported breast origin.

Metastatic Site: gallbladder, liver, lung/pleura, bone

The patient died 3 years and 10 months after lumpectomy after metastatic ER/PR/HER2-positive breast cancer involved the gallbladder, liver, lungs/pleura, and bones following incomplete adjuvant therapy and loss to surveillance.

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Hormone receptor-positive male breast cancer: spontaneous regression after biopsy and mastectomy

Patient Info: Anonymized, Male, 50s

Biomarkers: ER-positive; PR-positive; HER2-negative; p63 staining confirmed myoepithelial cells in residual benign cystic lesion

Mastectomy and axillary clearance showed no residual invasive carcinoma or carcinoma in situ, with clear margins; he recovered well and began adjuvant tamoxifen because of the original ER/PR-positive biopsy.

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Stage IIA male breast cancer: chemotherapy, mastectomy, endocrine therapy, and benign adrenal nodule

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

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

Final breast cancer pathology was T1N1M0 / AJCC Stage IIA ER-positive, PR-positive, HER2-negative invasive ductal carcinoma; the suspicious adrenal lesion was removed in June 2025 and proved to be a benign adrenal adenoma.

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Stage IIIB male encapsulated papillary breast cancer: disease-free after surgery and adjuvant therapy

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

Biomarkers: ER-positive 100%; PR-positive 100%; HER2-negative / IHC 1+; p63 loss supported encapsulated papillary carcinoma; no neuroendocrine differentiation

Three years after diagnosis, he was clinically doing well without evidence of breast cancer recurrence after mastectomy, radiation, and tamoxifen.

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Metastatic hormone receptor-positive breast cancer: palbociclib and fulvestrant during dialysis

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

Biomarkers: ER-positive; PR-negative; HER2 0 / HER2-negative; Ki-67 20.1%

Metastatic Site: lung, pleura, bone, right supraclavicular lymph node

As of August 2025, metastatic breast cancer had remained stable for 18 months on fulvestrant plus dialysis-adjusted palbociclib dosing, with hematologic toxicity managed through treatment interruptions, transfusion, and dose reduction.

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Stage IIB HER2-positive apocrine breast carcinoma treated with chemotherapy, trastuzumab, radiation, and tamoxifen

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

Biomarkers: ER 80%; PR 5%; HER2-positive by HercepTest and FISH; Ki-67 15%; AR testing not performed

At 7 months of follow-up, the patient remained in remission, with no locoregional recurrence or distant metastasis reported.

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Stage 3 breast cancer: complete pathological response to chemotherapy

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

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

At 1-year follow-up, she remained free of breast cancer; a thyroid nodule found on CT had no malignancy on fine-needle aspiration.

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Isolated adrenal metastasis from breast cancer: adrenalectomy and exemestane plus palbociclib

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

Biomarkers: ER-positive; PR-positive; HER2-negative; GATA3-positive; CK7-positive; mammaglobin-positive; GCDFP-15 rare staining

Metastatic Site: right adrenal gland

After laparoscopic right adrenalectomy for isolated metastatic breast carcinoma, follow-up CT abdomen/pelvis and PET-CT showed no metastatic disease elsewhere; surveillance while on exemestane and palbociclib showed no recurrence so far.

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HER2-low lobular breast cancer with bone marrow involvement responding to 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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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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Stage III HR-Positive Invasive Lobular Carcinoma: Courtney's Patient Story

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

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

As of June 2025, Courtney was recovering from Stage III ER-positive, PR-positive, HER2-negative ILC treatment after double mastectomy, Taxotere/Cytoxan chemotherapy, and 25 rounds of radiation, with reconstructive surgery delayed by radiation skin injury.

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HR-Positive Breast Cancer: Sara's Patient Story

Patient Info: Sara Glenn, Female, Under 40

Biomarkers: TP53 mutation / Li-Fraumeni syndrome; ER-positive; HER2-negative

As of June 2025, Sara had completed bilateral mastectomy and reconstruction for ER-positive, HER2-negative breast cancer and was on planned 10-year tamoxifen plus intensive Li-Fraumeni syndrome surveillance for herself and her daughters.

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Metastatic male breast cancer: complete metabolic response after restarting anastrozole, leuprolide, abemaciclib, zoledronic acid, and radiation

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

Biomarkers: ER >95%; PR >95%; HER2/neu-negative; Ki-67 30%; PIK3CA exon 21 pathogenic variant; BRCA1 not mutated; BRCA2 not mutated

Metastatic Site: bone (vertebral bodies T2-T6, L1, and L5)

As of May 2025, after restarting endocrine and targeted therapy and receiving palliative radiation, the last two PET scans showed complete metabolic response without disease progression, and brain MRI showed no metastasis.

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

Patient Info: Tanya, Female, 40s | Stage III

Biomarkers: ER-positive; PR-positive; HER2-negative; grade 1

As of May 2025, Tanya was recovering from chest wall surgery, ALT flap repair, and a later skin graft after developing angiosarcoma in her radiated reconstructed breast years after Stage IIIA ILC treatment.

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Stage IIIB ER/PR-positive breast cancer: emergency mastectomy for infected fungating tumor

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

Biomarkers: ER >75%; PR >75%; HER2 0 / HER2-negative; grade 3 invasive ductal carcinoma

As of May 2025, management centered on anastrozole after emergency mastectomy, repeated debridements, wound care, and major postoperative complications; oncology follow-up had become inconsistent because of ongoing medical setbacks.

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Stage II HR-Positive Breast Cancer: Kelsey's Patient Story

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

Biomarkers: ER-positive

As of May 2025, Kelsey had completed chemotherapy, double mastectomy with reconstruction, and 16 radiation sessions, and was continuing tamoxifen with Verzenio planned for 2 years plus Lupron ovarian-suppression shots.

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Stage II HR-Positive Invasive Ductal Carcinoma: LaShae's Patient Story

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

Biomarkers: ER-positive; comprehensive genetic panel negative

As of May 2025, LaShae had completed mastectomy for Stage IIB ER-positive breast cancer with 2 positive lymph nodes and was undergoing chemotherapy, with radiation and 5-10 years of hormone therapy planned.

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