EGFR-Mutant Stage IV Lung Cancer Treated After Osimertinib-Related Lung Toxicity

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

Biomarkers: EGFR exon 19 deletion; later EGFR T790M resistance mutation

Metastatic Site: brain, lungs, bones, left adrenal gland, meninges

The latest documented treatment was a lower-dose osimertinib rechallenge with corticosteroids, which reduced the tumor without recurrence of the prior interstitial lung disease.

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Stage IIIA EGFR lung adenocarcinoma: no recurrence after early osimertinib stop

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

Biomarkers: EGFR exon 19 deletion mutation; elevated KL-6 and SP-D during interstitial lung disease episode

During 9 months of follow-up after osimertinib was stopped, she had no recurrence of interstitial lung disease, pulmonary embolism, or non-small cell lung cancer.

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Stage IVA EGFR L858R lung adenocarcinoma with malignant effusions and thrombosis

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

Biomarkers: EGFR exon 21 L858R mutation; TTF-1 weak positive; Napsin A positive; p40 negative; Ki-67 about 10%

Metastatic Site: malignant pleural effusion; malignant pericardial…

As of May 2025, abdominal pain had resolved, splenic infarction had not progressed, thromboembolic events were regressing, no new thrombus formation was seen, and outpatient follow-up continued while he remained on cancer and anticoagulation management.

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Stage II EGFR Lung Cancer: Samantha's Patient Story

Patient Info: Samantha Vaughn, Female | Stage II

Biomarkers: EGFR mutation

Samantha had Stage II EGFR-mutated lung cancer removed surgically and was receiving post-operative daily Tagrisso through a clinical trial. As of June 2025, she reported clear results so far but remained on active targeted therapy.

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Stage IV EGFR Lung Cancer: Natasha's Patient Story

Patient Info: Natasha, Female | Stage IV

Biomarkers: EGFR-positive

Metastatic Site: brain

Natasha had Stage IV EGFR-positive lung cancer with brain metastases. Tagrisso/osimertinib was her main treatment, but a new brain metastasis later appeared and was treated with Gamma Knife. As of May 2025, she was awaiting follow-up MRI while continuing care.

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How We Got Here: 6 Young Lung Cancer Patients & Their Paths To Surgery- Part 1

Patient Info: Leah Phillips, Female | Stage IV

Biomarkers: EGFR exon 19 deletion

Metastatic Site: bone (pelvis; spine; ribs)

As of April 2025, Leah was living with Stage IV EGFR exon 19 deletion lung cancer while continuing Tagrisso after SBRT and right middle lobe lobectomy.

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Stage IV EGFR Non-Small Cell Lung Cancer: Jeff's Patient Story

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

Biomarkers: EGFR-positive; exon 19 mentioned

Metastatic Site: brain; bones — ribs, femur/hip, clavicle

Jeff has Stage IV EGFR-positive non-small cell lung cancer with brain and bone metastases. Biomarker testing changed the plan from radiation/chemotherapy toward Tagrisso targeted therapy. As of March 2025, he was living with metastatic lung cancer and emphasizing hope and self-advocacy.

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EGFR-Mutant Lung Adenocarcinoma That Transformed to Small Cell Lung Cancer

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

Biomarkers: EGFR exon 19 deletion; acquired EGFR T790M mutation

Metastatic Site: liver

The cancer progressed after transformation to small cell lung cancer, and she died 49 months after the original diagnosis.

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EGFR-Mutant Lung Adenocarcinoma That Transformed to Small Cell Lung Cancer

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

Biomarkers: EGFR exon 19 deletion

Metastatic Site: brain, adrenal gland, liver, thyroid

The cancer progressed after small-cell transformation with adrenal, thyroid, liver and brain involvement, and she died 52.7 months after the original diagnosis from disease progression and organ failure.

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EGFR-Mutant Lung Cancer With Pleomorphic Transformation Treated With Local Surgery

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

Biomarkers: EGFR L858R mutation; PD-L1 less than 1% initially and greater than 75% after transformation

Metastatic Site: brain

Nine months after surgery for isolated progression, no recurrence had been seen and she remained on osimertinib.

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Stage IV EGFR Lung Cancer: Leah's Patient Story

Patient Info: Leah Phillips, Female, 40s | Stage IV

Biomarkers: EGFR mutation

Metastatic Site: Not reported

As of December 2024, Leah was recovering well a few weeks after right-middle-lobe lobectomy, but remained a Stage IV EGFR-mutated lung cancer patient needing ongoing treatment and follow-up.

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Metastatic EGFR-positive lung adenocarcinoma: osimertinib cardiomyopathy managed with SGLT2 inhibitor support

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

Biomarkers: EGFR-positive; specific EGFR sequence variant not reported in extracted case text

As of December 2024, he remained clinically stable and asymptomatic 12 months after osimertinib rechallenge with empagliflozin, losartan, metoprolol, and close cardiac monitoring; the extracted case focuses on cardiotoxicity management rather than tumor response.

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Stage IV EGFR Non-Small Cell Lung Cancer: Filipe's Patient Story

Patient Info: Filipe, Male, Under 40 | Stage IV

Biomarkers: EGFR exon 19 deletion

Metastatic Site: brain, bone, left lung, kidney

As of November 2024, Filipe was living with ongoing Stage IV EGFR exon 19-mutated lung cancer after initial response to osimertinib, later progression and current amivantamab plus chemotherapy.

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Stage III EGFR-mutated lung adenocarcinoma: osimertinib and surgery

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

Biomarkers: EGFR L858R; EGFR L861Q

No evidence of disease on PET-CT or brain MRI after 42 months of follow-up following neoadjuvant osimertinib and surgery.

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Stage III EGFR exon 19-deleted lung adenocarcinoma: osimertinib and surgery

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

Biomarkers: EGFR exon 19 deletion

No sign of metastasis on PET-CT or brain MRI after 24 months of follow-up following neoadjuvant osimertinib, left upper-lobe resection, and adjuvant osimertinib.

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Stage I Lung Adenocarcinoma With Later Kidney Metastases Responding to Osimertinib

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

Biomarkers: EGFR L858R mutation; RB1 mutation; MAP3K1 mutation; PD-L1 negative

Metastatic Site: kidneys, peritoneal lymph nodes

Osimertinib produced a partial response within 6 weeks after metastatic recurrence in the kidneys. She remained alive and continued targeted treatment.

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EGFR exon 19 deletion lung cancer: gefitinib after osimertinib toxicity

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

Biomarkers: EGFR exon 19 deletion

As of August 2024, Stage IVB EGFR exon 19 deletion lung adenocarcinoma was being treated with gefitinib after osimertinib-induced grade 3 interstitial lung disease; ILD had not recurred, and low-dose prednisolone continued.

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Stage 4 EGFR-mutant lung cancer controlled on gefitinib after osimertinib intolerance

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

Biomarkers: EGFR exon 21 L858R mutation

As of August 2024, Stage IVB EGFR L858R lung adenocarcinoma was being treated with gefitinib after grade 3 osimertinib-induced interstitial lung disease; the cancer had not progressed when steroids were completed and ILD had not recurred on gefitinib.

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EGFR-mutant lung adenocarcinoma transforming to small cell lung cancer during targeted therapy

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

Biomarkers: EGFR exon 19 deletion, TP53 mutation, TMB 11 mut/Mb

Metastatic Site: cervical lymph nodes

At the last follow-up in February 2024, 32 months after diagnosis, she was alive and both the primary lung lesion and cervical lymph-node metastasis had decreased on combined chemotherapy, immunotherapy and targeted therapy.

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Seven-year response journey in EGFR-mutated metastatic lung adenocarcinoma

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

Biomarkers: EGFR mutation

Metastatic Site: pleura, brain

About 7 years after presentation with metastatic lung adenocarcinoma, he remained on targeted therapy. Gefitinib controlled the disease for 5 years; after brain progression, osimertinib followed by stereotactic radiation produced a complete intracranial response.

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Stage IIIA EGFR-mutated lung adenocarcinoma: surgery after osimertinib

Patient Info: Anonymized, Male, 60s

Biomarkers: EGFR E746_A750 deletion; PD-L1 TPS 15%; TMB 5.01 Muts/Mb; TTF-1 3+; CK7 3+; Ki67 60%

As of July 2024, surveillance CT scans at 2, 6, and 12 months after surgery showed no recurrent malignancy while he continued adjuvant osimertinib.

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Stage IV EGFR Non-Small Cell Lung Cancer: Leah's Patient Story

Patient Info: Leah Phillips, Female, 40s | Stage IV

Biomarkers: EGFR exon 19 deletion

Metastatic Site: bone (spine, pelvis); malignant right pleural…

As of July 2024, Leah remained on daily Tagrisso with stable Stage IV EGFR-mutated lung cancer, no reported progression, healing/sclerotic bone metastases, and durable response for more than 4 years.

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Stage IV EGFR-mutated lung cancer with acquired resistance to osimertinib

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

Biomarkers: EGFR L858R; acquired EGFR T790M; acquired EGFR L718Q

Metastatic Site: pleura, bone

After temporary disease control with sequential EGFR-targeted therapies, the right lung lesion enlarged again in June 2021; she was alive at the latest follow-up.

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Stage IV EGFR-mutated lung cancer treated after osimertinib resistance

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

Biomarkers: EGFR L858R, TP53 mutation; acquired EGFR T790M; acquired EGFR L718Q

Metastatic Site: lungs, bone

Dacomitinib produced brief stable disease, but the lung cancer progressed again by September 2021; she was alive at the latest follow-up.

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