Non-Small Cell Lung Cancer (NSCLC)

Overview

Lung cancer is not one disease but a family of biologically distinct tumours. Roughly 85 % of all lung cancers fall into the non-small-cell group, the rest being small-cell type.

Within NSCLC, the three main histologies are adenocarcinoma, squamous-cell carcinoma, and large-cell carcinoma.

Two decades ago, treatment meant the same chemotherapy for everyone. Today, thanks to genomic research, NSCLC is a molecularly driven illness. When we identify the specific mutation powering a tumour, we can often match it to an oral targeted drug or immunotherapy that dramatically improves outcomes.

At Coimbatore Cancer Clinic, every patient is offered comprehensive molecular testing before starting therapy. This ensures a truly personalised approach—maximising benefit, minimising toxicity, and giving patients years of high-quality life that were once impossible.

Risk Factors & Causes

● Smoking: the dominant cause (about 80 %).

● Second-hand smoke: risk rises even in lifelong non-smokers.

● Air pollution & biomass fuel exposure: important in India; associated with EGFR-mutant adenocarcinoma in never-smokers and women.

● Occupational hazards: asbestos, chromium, nickel, arsenic, diesel exhaust.

● Radiation exposure or prior chest radiotherapy.

● Genetic predisposition: familial clustering; germline EGFR T790M or TP53.

● Age > 50 years and male sex remain traditional demographic risks.

Pathologic Types

Type Common Site Key Features Frequent Mutations
Adenocarcinoma Peripheral Gland-forming, mucin-producing EGFR, ALK, ROS1, RET, KRAS, BRAF, HER2
Squamous-cell carcinoma Central airways Keratin pearls, smoking-linked FGFR1 amp, PIK3CA, DDR2, KEAP1
Large-cell / Sarcomatoid Anywhere Poorly differentiated KRAS, STK11, SMARCA4
Adenosquamous / Mixed Variable Dual morphology Mixed mutations

Symptoms & Warning Signs

● Persistent or worsening cough

● Blood in sputum (hemoptysis)

● Chest or shoulder pain

● Shortness of breath or wheezing

● Hoarseness (recurrent-laryngeal-nerve involvement)

● Weight loss, fatigue, loss of appetite

Metastatic symptoms: headaches or seizures (brain), bone pain, jaundice, abdominal distension, or back pain.

Because many of these mimic ordinary lung infections, delayed diagnosis is common—underscoring the value of early imaging and screening.

Diagnostic Evaluation

1️⃣Imaging

● CT Chest with contrast – defines tumour size and nodes.

● PET-CT – detects hidden spread; now standard for staging.

● Brain MRI – mandatory for stage III/IV or neurologic symptoms.

2️⃣Tissue Diagnosis

● Bronchoscopy for central lesions.

● CT-guided core needle biopsy for peripheral nodules.

● EBUS-TBNA for mediastinal nodes.

● VATS / surgical biopsy if minimally invasive options fail.

3️⃣Pathology & IHC

● TTF-1 / Napsin A → adenocarcinoma.

● p40 / CK5/6 → squamous.

● PD-L1 immunostaining → guides immunotherapy.

4️⃣Molecular Profiling (Next-Generation Sequencing)

Every non-squamous NSCLC—and many squamous cases in non-smokers—should be tested for a panel of actionable alterations:

Driver Alteration Approx. Frequency (Asian) Approved 1st-line Therapies (2025)
EGFR Ex 19 del / L858R 30–40 % Osimertinib
EGFR Ex 20 ins 2 % Amivantamab + Lazertinib
ALK fusion 5–7 % Alectinib / Lorlatinib
ROS1 fusion 1–2 % Entrectinib / Crizotinib
MET ex14 skip 3 % Tepotinib / Capmatinib
RET fusion 1–2 % Selpercatinib / Pralsetinib
BRAF V600E 1 % Dabrafenib + Trametinib
KRAS G12C 3 % Sotorasib / Adagrasib
HER2 mut / amp 2 % Trastuzumab Deruxtecan
NTRK fusion < 1 % Larotrectinib / Entrectinib
PD-L1 ≥ 1 % ≈ 40 % Pembrolizumab / Nivolumab ± Chemo

Liquid-biopsy cfDNA testing complements tissue analysis when samples are small.

Stage Classification (AJCC 8ᵗʰ)

● Stage I–II: confined to lung ± small nodes.

● Stage III: mediastinal or chest-wall involvement but no distant spread.

● Stage IV: metastatic to opposite lung, bone, brain, liver, adrenals.

Stage-wise Treatment Approach (2025)

Stage I–II (Localized Disease)

Goal → Cure


Surgery: lobectomy or segmentectomy + systematic node dissection. Minimally invasive (VATS/robotic) preferred.

Adjuvant Chemotherapy: Cisplatin + Pemetrexed / Vinorelbine for stage II or node positive.

Adjuvant Targeted Therapy:
.
     o EGFR-mutant: Osimertinib for 3 years (adjuvant ADAURA protocol).

     o ALK-positive: Alectinib under study (SALSA trial).

Adjuvant Immunotherapy: Atezolizumab for PD-L1 ≥ 1% post-chemo (IMpower010).

Surveillance: CT every 6 months × 2 years then yearly.

Stage III (Locally Advanced)

Goal → Cure or Long-term Control

Options depend on resectability:

Stage IIIA (resectable):
.
 o Neoadjuvant chemo ± immunotherapy (Pembrolizumab + Cisplatin doublet).
.
 o Surgery → Adjuvant targeted or immunotherapy based on biomarkers.

Unresectable Stage III (N2 / N3):
.
     o Concurrent Chemoradiation (Cisplatin + Etoposide or Pemetrexed + Radiation 60 Gy).
.
     o Durvalumab consolidation for 1 year (PACIFIC trial) improves 5-year OS to 43%.

Stage IV (Metastatic)

Goal → Disease control, symptom relief, prolonged survival

Treatment is now entirely biomarker-driven.

1️⃣ Targetable Driver Mutations

Driver Preferred 1st-line Therapy Key Features / Notes
EGFR (Ex 19 del, L858R) Osimertinib CNS penetration; median OS > 5 y
EGFR Ex 20 ins Amivantamab + Lazertinib Post-chemo or 1st-line combo under review
ALK fusion Alectinib / Lorlatinib > 80% response; excellent CNS control
ROS1 fusion Entrectinib / Crizotinib High ORR (70–80%)
RET fusion Selpercatinib / Pralsetinib Rapid symptom relief
MET ex14 skip Tepotinib / Capmatinib Useful in elderly; watch for edema
BRAF V600E Dabrafenib + Trametinib > 60% response
KRAS G12C Sotorasib / Adagrasib For smoker tumors; oral daily therapy
HER2 mutation Trastuzumab Deruxtecan (T-DXd) Antibody–drug conjugate
NTRK fusion Larotrectinib / Entrectinib Rare but remarkably sensitive

Sequential re-biopsy or liquid biopsy is recommended when progression occurs to identify resistance mutations (e.g., EGFR C797S).

2️⃣ PD-L1 Expression / Immunotherapy

PD-L1 TPS Recommended Approach
≥ 50 % Pembrolizumab monotherapy (KEYNOTE-024)
1 – 49 % Chemo + Pembrolizumab or Atezolizumab (KEYNOTE-189)
< 1 % Platinum doublet ± IO combo (Nivolumab + Ipilimumab + Chemo)

Immunotherapy achieves durable responses lasting years in a subset of patients with high PD-L1 or inflamed tumours.

3️⃣ Chemotherapy for Driver-Negative Disease

● Non-squamous: Carboplatin + Pemetrexed ± Pembrolizumab.

● Squamous: Carboplatin + Paclitaxel ± Pembrolizumab. Maintenance Pemetrexed or Pembrolizumab after 4–6 cycles.

4️⃣ Oligometastatic Disease

● Local ablation (SBRT or surgery) for limited metastases can prolong survival.

● Continue targeted therapy throughout.

5️⃣ Brain Metastases

● Modern TKIs (Osimertinib, Lorlatinib, Selpercatinib) cross the blood–brain barrier.

● SRS (Stereotactic Radiosurgery) preferred over whole-brain RT.

Resistance & Subsequent Therapy

Most patients on targeted therapy eventually develop resistance. Common mechanisms include:

● EGFR T790M → treated with Osimertinib.

● ALK G1202R → Lorlatinib.

● MET amp or HER2 bypass → switch to appropriate targeted agent.

● Histologic transformation (adenocarcinoma → small-cell) → treat as SCLC.

ctDNA testing helps detect these changes non-invasively and guide next steps.

Recent Advances (2024 – 2025)

● Peri-operative Immunotherapy: neoadjuvant Nivolumab + Chemo (CHK 8 trial) improves pathologic response.

● Adjuvant Osimertinib data (ADAURA update) shows 5-year DFS > 70 %.

● Antibody–Drug Conjugates (ADCs): Patritumab Deruxtecan for EGFR-resistant cases; Datopotamab Deruxtecan for TROP2-positive tumours.

● ctDNA MRD tracking predicts recurrence months earlier than scans.

● AI-guided radiomics for therapy response assessment.

Supportive Care & Quality of Life

● Symptom control: breathlessness, pain, cough managed by integrated palliative care.

● Nutrition & exercise programmes maintain muscle mass during therapy.

● Smoking cessation and lung rehabilitation reduce toxicity.

● Psychological support for anxiety and fear of recurrence.

Our Expertise @ Coimbatore Cancer Clinic

● Complete diagnostic work-up including bronchoscopy, EBUS and biopsy on site.

● NGS panel testing for all actionable mutations (EGFR, ALK, ROS1, MET, RET, KRAS, HER2, PD-L1).

● Access to targeted and immunotherapy agents through patient-assistance programmes in India.

● Tumour-board discussion for every case to design a personalised plan.

● Seamless referral to CAR-T and cell-therapy trials at partner centres when indicated.

When to Consult

Any persistent cough, unexplained breathlessness or blood in sputum should prompt a chest CT and specialist evaluation — early diagnosis can save lives

Frequently Asked Questions

Is NSCLC curable?

Yes, when caught early. Even stage IV disease can often be controlled for years with targeted or immune therapy.

Do all patients need chemotherapy?

No. Many receive oral targeted therapy alone if a driver mutation is found.

Are targeted drugs available in India?

Yes — most agents (EGFR, ALK, ROS1, RET, MET, KRAS inhibitors and immunotherapies) are approved and accessible through support programs.

How long will treatment continue?

Targeted and immunotherapies are continued until progression or intolerance; some patients remain stable > 5 years.

Disclaimer

This page is for educational information only. Treatment should be individualised by qualified oncologists based on complete clinical and molecular evaluation.

Small Cell Lung Cancer (SCLC)

Overview

Small Cell Lung Cancer (SCLC) is a fast-growing form of lung cancer that originates from neuro-endocrine cells lining the bronchi.

It represents about 15 % of all lung cancers but causes a disproportionately high number of deaths because of its aggressive biology and early spread. Unlike Non-Small Cell Lung Cancer (NSCLC), SCLC usually responds dramatically to initial chemotherapy and radiation, yet it tends to relapse within months.

Recent advances—including immunotherapy, maintenance strategies, and novel antibody–drug conjugates—are improving both survival and quality of life. At Coimbatore Cancer Clinic, we combine rapid diagnosis, state-of-the-art staging, and NCCN-aligned multimodality therapy to ensure that every patient receives the most effective and least disruptive treatment possible.

Causes & Risk Factors

● Cigarette smoking – present in > 95 % of cases; cumulative exposure is the major determinant.

● Second-hand smoke – increases risk for household contacts.

● Occupational exposure – asbestos, arsenic, diesel exhaust.

● Radon gas – naturally occurring radioactive gas trapped in poorly ventilated areas.

● Genetic susceptibility – rare germline variants in TP53 or RB1.

Pathology & Biology

Microscopically, SCLC cells are small with scant cytoplasm, finely granular chromatin, and high mitotic rate.

They express neuro-endocrine markers (Synaptophysin, Chromogranin A, CD56) and often produce hormones causing paraneoplastic syndromes (SIADH, ectopic ACTH, Lambert-Eaton myasthenic syndrome).

Biologically, almost all SCLCs show loss of TP53 and RB1. Molecular subsets defined by transcription factors (ASCL1, NEUROD1, POU2F3, YAP1) may soon guide personalised therapy.

Symptoms & Presentation

● Persistent cough or chest pain

● Shortness of breath or wheezing

● Coughing up blood

● Rapid weight loss, fatigue

● Facial swelling or distended neck veins (superior vena cava syndrome)

● Neurologic or metabolic abnormalities from paraneoplastic hormones

Because it spreads early, one-third of patients already have distant metastases at diagnosis.

Diagnostic Evaluation

1️⃣ Imaging & Staging

● CT Chest + Abdomen for initial assessment.

● PET-CT for metabolic staging when available.

● Brain MRI mandatory at baseline — brain metastases occur in up to 25%.

● Bone scan if PET not available.

2️⃣ Tissue Diagnosis

● Bronchoscopic biopsy (endobronchial or EBUS).

● Core-needle biopsy for peripheral lesions or metastases.

Histopathology distinguishes pure SCLC from combined SCLC + NSCLC, which has treatment implications.

3️⃣ Staging Systems

Although AJCC TNM 8ᵗʰ is now recommended, clinicians still classify disease as:

Limited-Stage (LS-SCLC) – confined to one hemithorax and regional nodes, treatable within a single radiation field.

Extensive-Stage (ES-SCLC) – spread beyond those limits (contralateral chest, distant organs).

Treatment Approach

Limited-Stage Disease (LS-SCLC)

Goal → Cure

1. Concurrent Chemoradiation

● Platinum (Cisplatin or Carboplatin) + Etoposide × 4 cycles with thoracic RT (45 Gy twice-daily or 60 Gy daily).

● Starting radiation within the first or second chemo cycle gives the best survival.

2. Prophylactic Cranial Irradiation (PCI)

● Reduces brain metastases by > 50%.

● Recommended for good-response patients ≤ 70 years with ECOG 0–2.

3. Maintenance / Consolidation

● No standard targeted agent yet, but trials using immunotherapy consolidation are ongoing.

Outcomes: 5-year survival 30–35% (double that achieved in the 1990s).

Extensive-Stage Disease (ES-SCLC)

Goal → Long-term Control, Symptom Relief

1️⃣ First-Line Therapy

Chemo-Immunotherapy Combination (Standard of Care 2025):
     o Atezolizumab + Carboplatin + Etoposide (IMpower133)

     o Durvalumab + Carboplatin + Etoposide (CASPIAN trial)

     o 4 cycles followed by maintenance immunotherapy until progression. → Median OS ≈ 15–17 months vs 10 months with chemotherapy alone.

2️⃣ Second-Line / Relapsed Therapy

● Lurbinectedin (transcription-inhibitor) – response ≈ 35%.

● Topotecan – long-used alternative where Lurbinectedin unavailable.

● Platinum re-challenge – for relapses > 6 months after initial therapy.

● Clinical trials / ADCs – e.g., DLL3-targeted Tarlatamab showing encouraging results.

3️⃣ Local Treatment

● Thoracic RT to residual chest lesion after good chemo-response.

● Palliative RT for bone, brain, or airway symptoms.

Immunotherapy & Biomarkers

Unlike NSCLC, PD-L1 expression and TMB are not reliable biomarkers in SCLC; all-comer immunotherapy is used.

Checkpoint inhibitors (Atezolizumab, Durvalumab) enhance survival modestly but meaningfully.

Research into novel immune targets—TIM-3, TIGIT, CTLA-4—is ongoing.

Emerging Targets and Precision Therapies

● DLL3 (Delta-Like Ligand 3): over-expressed in > 80 % of SCLCs; targeted by Tarlatamab (BiTE) and Rovalpituzumab tesirine (ADC).

● PARP inhibitors for homologous-recombination-deficient tumours.

● Epigenetic modifiers (EZH2, BET inhibitors) reversing neuro-endocrine phenotype.

● Molecular subtyping (ASCL1, NEUROD1, POU2F3, YAP1) guiding trial enrolment.

Supportive & Palliative Care

Because of the disease’s pace, supportive care is integral from day 1:

● Anti-nausea, appetite stimulants, and pain control.

● Early palliative-care involvement improves survival and quality of life.

● Psychosocial and smoking-cessation counselling.

● Nutritional support to maintain weight during therapy.

Follow-Up

● Clinical review and CT chest every 3 months for 2 years, then 6-monthly.

● Brain MRI every 6–12 months for patients who declined PCI.

● Manage late effects: fatigue, cognitive changes, hearing loss, neuropathy.

Our Expertise @ Coimbatore Cancer Clinic

● Rapid same-day diagnostic pathway (CT, bronchoscopy, EBUS).

● Multidisciplinary tumour board for combined chemo-radiation planning.

● Availability of Atezolizumab / Durvalumab / Lurbinectedin through assistance programmes.

● Precision radiation facilities with image guidance and conformal dosing.

● Dedicated survivorship and neuro-cognitive rehabilitation support after PCI.

When to Consult

● Any chronic smoker with new cough, hoarseness, or facial swelling should undergo CT chest immediately.

● Early detection during screening can convert an otherwise fatal disease into one with curative potential.

Frequently Asked Questions

Is SCLC curable?

Yes, if confined to the chest (limited stage) and treated early with chemo-radiation.

Does immunotherapy help?

Adding Durvalumab or Atezolizumab to first-line therapy extends life by several months and produces long-term survivors in about 15%.

Will I lose my hair?

Temporary hair loss is common with Etoposide and Platinum but reversible after therapy.

Can SCLC come back?

Relapse is frequent; however, newer drugs like Lurbinectedin and Tarlatamab offer effective second-line options.

Disclaimer

This information is for patient education only. Individual treatment must be decided by qualified oncologists based on stage, organ function, and patient preference.

Malignant Mesothelioma (Pleural & Peritoneal)

Overview

Malignant mesothelioma is an uncommon but devastating cancer of the mesothelial cells—the delicate lining that covers the lungs (pleura), abdomen (peritoneum), heart (pericardium), and testis (tunica vaginalis). Nearly 90 % of cases involve the pleura. The disease is almost always linked to asbestos exposure, sometimes decades earlier.

Although mesothelioma historically carried a grim outlook, survival is improving dramatically in the modern era through early multidisciplinary evaluation, tailored surgery, precision chemotherapy, and immune checkpoint inhibitors. At Coimbatore Cancer Clinic, every patient is assessed by a thoracic oncology board to individualize care — balancing tumor control, lung preservation, and quality of life.

Disease Biology & Pathogenesis

● Asbestos fibers (chrysotile, amosite, crocidolite) are inhaled and embed within the pleura or peritoneum.

● Chronic inflammation and oxidative DNA injury cause mutations in BAP1, NF2, CDKN2A, and TP53.

● Mesothelial cells undergo malignant transformation, forming diffuse, sheet-like tumors encasing the lung or abdominal organs.

● The latency period averages 30–40 years after exposure, explaining why incidence continues to rise despite asbestos bans.

Risk Factors

● Occupational exposure: shipyard, textile, brake-lining, insulation, construction.

● Secondary household exposure (washing asbestos-laden clothes).

● Radiotherapy to the chest.

● Genetic predisposition: germline BAP1 mutation increases lifetime risk.

● Male gender, age > 60 years.

Symptoms & Warning Signs

● Persistent shortness of breath

● Chest or shoulder pain, often dull or diffuse

● Recurrent pleural effusion (fluid around lungs)

● Fatigue, loss of appetite, weight loss

● Persistent cough or hoarseness

● For peritoneal disease: abdominal distension, pain, or early satiety

Because these symptoms mimic benign pleural disease, many patients are diagnosed late.

Diagnosis & Investigations

1. Imaging

o CT Chest/Abdomen → shows irregular pleural thickening, nodules, or encasement of lung.

o PET-CT → differentiates benign from malignant and maps metastases.

o MRI → superior for chest-wall, diaphragmatic, or pericardial invasion.

2. Fluid Analysis

o Pleural tapping (thoracentesis) rarely diagnostic — sensitivity < 30%.

o If cytology positive, immunocytochemistry (Calretinin+, WT-1+, CK5/6+) confirms mesothelial origin.

3. Tissue Biopsy (Gold Standard)

o Video-Assisted Thoracoscopic Surgery (VATS) or medical thoracoscopy yields ample tissue for histologic and molecular study.

o Subtyping: Epithelioid (70%, best prognosis), Sarcomatoid, Biphasic.

4. Staging


o AJCC 8ᵗʰ Edition TNM:
     ▪ T: pleural surface involvement

     ▪ N: ipsilateral vs contralateral nodes

     ▪ M: distant metastasis

o Accurate staging determines operability.

Management Strategy

1️⃣ Multimodality Approach

The best outcomes occur in experienced centers combining surgery + chemotherapy ± radiation.

A. Surgery

Two principal operations:

Procedure Description Typical Candidates
Pleurectomy–Decortication (P/D) Removes pleura and tumor rind while preserving lung Fit patients with early epithelioid histology
Extrapleural Pneumonectomy (EPP) Removes entire lung, pleura, pericardium, diaphragm Selected younger patients with disease confined to one hemithorax

Post-operative 30-day mortality is < 5% in expert hands.

Lung-sparing P/D is increasingly favored for better function and similar control.

B. Chemotherapy

● Cisplatin + Pemetrexed (standard of care; 3-weekly × 4–6 cycles).

● Carboplatin can replace cisplatin for renal impairment.

● Addition of Bevacizumab improves median survival by 2–3 months.

● Vitamin B₁₂ + Folate supplementation mandatory to reduce toxicity.

C. Immunotherapy

● Nivolumab + Ipilimumab dual checkpoint blockade — first-line for unresectable disease (CheckMate 743).
 o Median overall survival ≈ 18 months vs 14 months with chemo.
 o Works best in non-epithelioid variants where chemo is less effective.

● Pembrolizumab or Durvalumab used in selected PD-L1–positive cases.

D. Radiation Therapy

● Adjuvant hemithoracic IMRT after EPP reduces local recurrence.

● Palliative RT (20–30 Gy) for pain, nerve compression, or chest-wall invasion.

E. Emerging Options

● Tumor Treating Fields (TTF): wearable electrical-field device disrupting cancer cell division.

● Mesothelin-directed Antibody–Drug Conjugates and CAR-T therapy under active trials.

● Maintenance immunotherapy under study (DREAM3R, BEAT-meso trials).

2️⃣ Peritoneal Mesothelioma

Cytoreductive Surgery + HIPEC (Hyperthermic Intraperitoneal Chemotherapy):
Heated cisplatin/pemetrexed perfusion directly in abdomen after complete visible tumor removal; median OS > 5 years in selected patients.

● Systemic chemo or immunotherapy for unresectable cases.

● Supportive management: ascitic drainage, paracentesis, albumin replacement, pain control, nutritional rehabilitation.

3️⃣ Symptom Control & Supportive Care

● Recurrent effusion → Indwelling pleural catheter for at-home drainage.

● Breathlessness → supplemental oxygen, breathing exercises.

● Pain → multimodal analgesia, intercostal nerve blocks.

● Psychological counselling and palliative-care integration from diagnosis.

Recent Advances (2024 – 2025)

● Genomic subclassification (BAP1, NF2, CDKN2A) predicting IO response.

● Personalized multimodal algorithms improving 3-year survival to ~30 %.

● Artificial-intelligence imaging for earlier diagnosis.

● Ongoing Indian trials evaluating cost-effective immunotherapy combinations.

Our Expertise at Coimbatore Cancer Clinic

● In-house diagnostic thoracoscopy and image-guided pleural biopsy.

● Collaboration with thoracic-surgical and HIPEC teams.

● Access to Pemetrexed, Bevacizumab, Nivolumab, and Ipilimumab locally.

● Comprehensive respiratory physiotherapy and palliative-care programs.

● Long-term follow-up with serial imaging and functional assessment.

When to Seek Evaluation

Persistent pleural effusion, chest heaviness, or unexplained breathlessness in anyone with past asbestos exposure warrants immediate CT and oncology review

FAQs

Is mesothelioma always fatal?

No. With early detection, lung-sparing surgery and immunotherapy can achieve multi-year control.

Can immunotherapy replace chemotherapy?

For non-epithelioid disease or patients unfit for chemo, yes — dual IO is now first-line.

How common is recurrence after surgery?

About 50% within 2 years; continued surveillance and early IO salvage improve outcomes.

Are treatments available in India?

All standard chemotherapy and immunotherapy agents are accessible through assistance programs.

Disclaimer

Information for patient education; individual management must be planned by qualified oncologists.

Thymomas and Thymic Carcinomas

Overview

The thymus sits behind the breastbone and plays a vital role in immune-cell maturation. Thymic epithelial tumors (TETs) are rare, but crucial because many are curable when detected early.

They span a spectrum:

● Thymoma: indolent, often linked with autoimmune diseases (notably myasthenia gravis).

● Thymic carcinoma: histologically malignant, higher metastatic potential.

At Coimbatore Cancer Clinic, each case is reviewed by a multidisciplinary thoracic team ensuring radical resection whenever feasible and meticulous management of associated autoimmune disorders.

Epidemiology & Etiology

● Incidence ≈ 1.5 per million / year.

● Peak 40–60 years; equal in men and women.

● Etiology unknown; no smoking correlation.

● Strong autoimmune association:

    o Myasthenia gravis (~30 %)

    o Pure red-cell aplasia, thyroiditis, lupus, or hypogammaglobulinemia.

Pathology & Molecular Insights

● Classified (WHO 2021) as A, AB, B1, B2, B3 (thymoma) and Type C (thymic carcinoma).

● GTF2I mutation is characteristic of indolent type A/AB; KIT, PI3K, EGFR alterations occur in carcinoma.

● PD-L1 over-expression common in carcinoma (potential IO target).

Clinical Presentation

● Often discovered incidentally on chest imaging.

● Symptoms due to compression:

    o Chest pain, cough, breathlessness.

    o Hoarseness, facial swelling (SVC obstruction).

● Autoimmune manifestations: muscle weakness, ptosis, diplopia.

Diagnosis & Staging

1. Contrast CT / MRI Chest: defines size, invasion of vessels or pericardium.

2. Biopsy: core-needle or thoracoscopic.

3. Myasthenia evaluation: anti-AChR or anti-MuSK antibodies.

4. Staging:

    o Masaoka-Koga (I–IV) remains practical for prognosis.

    o TNM 8ᵗʰ Edition increasingly used in international studies.

Treatment

1️⃣ Surgery (Cornerstone of Cure)

● Complete R0 thymectomy including perithymic fat.

● Approaches: median sternotomy, VATS, or robotic.

● For invasive tumors, en bloc removal of pericardium or lung segments may be required.

● Post-operative myasthenia improvement seen in 80%.

2️⃣ Adjuvant / Post-operative Therapy

Indication Treatment Notes
Stage I (R0) Observation Excellent 10-year OS > 90%
Stage II (capsular invasion) Radiotherapy 45–50 Gy Reduces local recurrence
Stage III / Positive margin Chemoradiation (Cisplatin + Etoposide + RT) Improves control
Thymic carcinoma Chemoradiation or systemic therapy Often aggressive

3️⃣ Unresectable / Metastatic

● First-line: CAP regimen (Cisplatin + Adriamycin + Cyclophosphamide) or Cisplatin + Etoposide.

● Second-line: Gemcitabine, Pemetrexed, or Paclitaxel.

Targeted therapy:

     o Sunitinib and Lenvatinib (multi-TKIs) active in refractory disease.

     o Imatinib for KIT-mutated carcinomas.

Immunotherapy: Pembrolizumab effective in PD-L1 ≥ 50% thymic carcinoma; caution in thymoma due to higher autoimmune toxicity (myositis, hepatitis).

4️⃣ Recurrent / Disseminated

● Surgical re-resection when feasible.

● Local RT or radiofrequency ablation for isolated pleural nodules.

● Systemic therapy as above for widespread disease.

Supportive & Autoimmune Management

● All thymoma patients screened and managed for myasthenia gravis in collaboration with neurology.

● Pre-operative optimization with anticholinesterases, corticosteroids, or plasmapheresis prevents crisis.

● Endocrine, thyroid, and hematologic evaluations periodically.

● Long-term follow-up with annual CT scans for ≥ 10 years (late recurrences possible).

Recent Advances

● Robotic thymectomy provides equivalent oncologic outcomes with smaller incisions and faster recovery.

● Next-generation sequencing of thymic carcinoma enables targeted therapy trials.

● Combination IO + TKI strategies under exploration.

● Indian collaborative registry data now improving local evidence and outcomes.

Our Expertise @ Coimbatore Cancer Clinic

● Advanced imaging and thoracoscopic biopsy facilities.

● Collaboration with thoracic surgeons skilled in robotic and extended thymectomy.

● Full suite of chemo, radiotherapy, and targeted drugs on-site.

● Integrated care with neurology for myasthenia and autoimmune control.

● Long-term survivorship tracking with multidisciplinary support.

When to Consult

Any anterior mediastinal mass or unexplained weakness, drooping eyelids, or double vision should prompt a CT chest and thymic evaluation.

Frequently Asked Questions

Can thymoma recur after many years?

Yes, hence prolonged surveillance is vital.

Is radiation always necessary after surgery?

Only if margins are close or tumor invades surrounding tissue.

Can I receive immunotherapy safely if I have myasthenia?

Caution is advised; your oncologist and neurologist will jointly decide.

Are robotic surgeries available locally?

Yes, through partner thoracic-surgical centers affiliated with our clinic.

Disclaimer

This information is meant for educational purposes only; management must be tailored by qualified specialists.