Left breast epithelioid MPNST with concurrent right breast cancer: no recurrence after surgery

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

Biomarkers: Left MPNST markers included S100 and SOX10 positivity. Right breast cancer was ER/PR-positive, HER2-negative/1+

As of March 2025, 3 years after bilateral mastectomy, there was no recurrence of the left epithelioid MPNST or the concurrent right breast invasive ductal carcinoma.

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Synchronous breast and right colon cancers: response to carboplatin-paclitaxel and surgery

Patient Info: Anonymized, Female, 70+

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

As of March 2025, 9-month follow-up showed no local recurrence or distant metastasis after multimodal treatment, while she continued anastrozole.

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Accessory breast cancer: surgery, radiation, endocrine therapy, no recurrence

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

Biomarkers: ER 2+/>95%; PR 3+/>95%; HER2-negative; Ki-67 2%

As of March 2025, 26 months after surgery, she continued anastrozole and breast MRI showed no evidence of recurrence.

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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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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 IIIA encapsulated papillary breast carcinoma with invasion: mastectomy, axillary dissection, and anastrozole

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

Biomarkers: ER 100%; PgR 80%; HER2 2+ by IHC with FISH negative; Ki-67 20%; initial biopsy HER2 1+

She received postoperative anastrozole alone after right mastectomy and axillary dissection; no apparent recurrence was observed 18 months after surgery.

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Stage I triple-negative solid basaloid adenoid cystic breast cancer treated with mastectomy and oral chemotherapy

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

Biomarkers: Current tumor was triple-negative with high Ki-67 and c-kit/CK7 staining. Prior breast cancer was ER-positive, HER2-positive, PR-negative.

One year after mastectomy and postoperative tegafur-gimeracil-oteracil potassium, she was recovering well without signs of metastasis.

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Paclitaxel-Related Macular Edema During Treatment for Metastatic Breast Cancer

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

Biomarkers: ER-positive, HER2-negative

Cancer treatment continued with eribulin after paclitaxel was stopped because of vision toxicity in early 2021.

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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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Two sisters with invasive lobular breast cancer and a shared CDH1 mutation

Patient Info: Anonymized, Female | Stage Metastatic/Advanced

Biomarkers: Both sisters had pathogenic CDH1 p.. Breast cancers were HER2-negative; older sister also had a PTCH1 variant of uncertain significance.

As of January 2025, both sisters were under ongoing hereditary diffuse gastric cancer surveillance with annual EGD after breast cancer treatment; no signs of HDGC or metastatic breast cancer were reported.

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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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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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Breast carcinoma in remission with stable cancer-associated retinal findings during follow-up

Patient Info: Anonymized, Female, 70+

Biomarkers: Breast cancer marker details not fully reported. CRMP-5 antibody changed from positive to negative; anti-retinal antibodies were present.

The breast carcinoma was described as in remission, and visual acuity and visual fields remained stable without progressive visual loss across 3 years of ophthalmic follow-up.

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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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ER-positive breast cancer: mastectomy after hormone therapy

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

Biomarkers: Breast cancer was ER+ and HER2-low/negative. PR changed from positive on biopsy to negative on final pathology; HNA-1 antibody found for neutropenia.

Stage IIA ER-positive invasive ductal breast cancer had no recurrence 3 years after endocrine therapy and total mastectomy with sentinel lymph node biopsy; autoimmune neutropenia was monitored rather than directly treated.

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Right-Sided Ductal Carcinoma in Situ Before a Second Breast Cancer

Patient Info: Anonymized, female, 60s

Biomarkers: ER-positive; PR-positive; HER2 1+

A woman treated for right-sided ductal carcinoma in situ in 2018 later developed a separate invasive cancer in the opposite breast.

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Triple-positive breast cancer: complete response to targeted therapy

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

Biomarkers: Triple-positive breast cancer; SBDS variants present; no detected TP53 variant on MyeloSeq.

Metastatic Site: liver

Stage IV triple-positive breast cancer with liver metastasis achieved complete response after paclitaxel, trastuzumab, pertuzumab, and G-CSF support; complete response was maintained for 18 months after treatment initiation while on maintenance HER2-directed and endocrine therapy.

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Stage IV Breast Cancer: Samantha's Patient Story

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

Biomarkers: Hormone-positive breast cancer; specific receptor details not reported

Metastatic Site: bone: rib, spine, pelvis

As of July 2024, Samantha was living with Stage IV hormone-positive breast cancer with bone metastases. Current treatment was working in most areas, but a breast tumor continued to grow and was surgically removed; ongoing treatment and 3-month scans were reported.

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HER2-positive breast cancer: surgery after neoadjuvant therapy

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

Biomarkers: ER 1% weakly positive; PR-negative; HER2-positive

No evidence of disease on follow-up while taking anastrozole after pathologic complete response to neoadjuvant T-DM1, lumpectomy/SLNB, radiotherapy, and adjuvant trastuzumab for Stage I HER2-positive breast cancer.

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Invasive lobular breast cancer with isolated scalp metastasis: excision and endocrine therapy

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

Biomarkers: Original breast tumor: ER-positive; PR-positive; scalp metastasis: CK7-positive; ER-positive; GCDFP-15 partially positive

Metastatic Site: scalp/skin

As of April 2024, she had no signs of recurrence in the breast or scalp and no distant metastasis after excision of the isolated scalp metastasis while continuing anastrozole.

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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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Aggressive breast cancer presenting with severe skin infection

Patient Info: Anonymized, Female

Biomarkers: ER 99% positive; PR 99% positive; HER2 1+ / negative; Ki-67 3%; grade 2; 3 interpectoral lymph nodes negative; later axillary-node biopsy benign

She recovered from sepsis and surgery, had no distant metastases and a benign axillary-node biopsy, and was receiving adjuvant radiation with anastrozole ongoing.

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A Breast Cancer Survivor Later Diagnosed With a Separate Metastatic Cancer Affecting Both Retinas

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

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

Her last breast-cancer follow-up showed no evidence of disease after 5 years of endocrine therapy. She later developed a separate widely metastatic cancer favored to be gastrointestinal or pancreaticobiliary in origin and died after choosing hospice.

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Metastatic breast cancer: three years in remission with T-DM1 (Kadcyla) treatment

Patient Info: Anonymized, Female | Stage IV

Biomarkers: HER2-positive; hormone receptor-positive

Metastatic Site: liver; spine / bone

T-DM1 produced a complete clinical and radiological response after 7 cycles, sustained for 41 months and 60 cycles while treatment continued.

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