When Hemoptysis Is Not Tuberculosis: A Radiology Case of Pulmonary Paragonimiasis Mimicking Cavitary Lung Disease
How Chest CT, Bronchoalveolar Lavage, and AI-Assisted Imaging Revealed an Overlooked Parasitic Infection
Hemoptysis Is Not Always Tuberculosis
In many countries, chronic hemoptysis immediately raises suspicion for pulmonary tuberculosis. A patient presenting with months of blood-tinged sputum, cavitary pulmonary lesions, and a positive tuberculin skin test often begins empirical anti-tuberculosis therapy before a definitive diagnosis is established.
However, radiologists know that cavitary lung lesions represent one of the broadest and most challenging differential diagnoses in thoracic imaging. Infection, malignancy, autoimmune disease, septic emboli, fungal disease, congenital disorders, and parasitic infections may all produce remarkably similar CT findings.
Among these conditions, pulmonary paragonimiasis remains one of the most frequently overlooked diseases, particularly in non-endemic countries. Increasing international migration, global travel, and changing dietary habits have expanded the geographic distribution of this parasitic infection, making recognition increasingly important for radiologists and clinicians worldwide.
The present case illustrates an important diagnostic lesson:
A cavitary lesion is an imaging finding—not a diagnosis.
Only through careful integration of imaging characteristics, laboratory data, epidemiologic history, and cytopathologic confirmation was the true diagnosis established.
Clinical Case Overview
A 51-year-old man who had recently immigrated from Myanmar presented with persistent respiratory symptoms that had continued for approximately six months.
His primary complaints included:
- Chronic hemoptysis
- Rust-colored sputum
- Persistent cough
Initial investigations suggested pulmonary tuberculosis because:
- Tuberculin skin testing was positive.
- Chest imaging demonstrated a cavitary lesion.
- Hemoptysis was persistent.
Nevertheless, sputum examination failed to identify acid-fast bacilli, parasite ova, or other infectious organisms.
Despite empirical anti-tuberculosis therapy, both clinical symptoms and radiologic abnormalities continued to progress rather than improve.
This discrepancy between clinical expectations and imaging evolution ultimately prompted further investigation.
Why This Case Matters
Pulmonary paragonimiasis is uncommon in North America and Europe but remains endemic throughout parts of East Asia and Southeast Asia.
Radiologists practicing in developed countries increasingly encounter patients originating from endemic regions, including:
- Korea
- Japan
- China
- Myanmar
- Thailand
- Vietnam
- Laos
- The Philippines
Failure to recognize characteristic imaging findings may lead to:
- unnecessary anti-tuberculosis treatment,
- delayed antiparasitic therapy,
- repeated invasive procedures,
- prolonged hospitalization,
- unnecessary surgery.
This case demonstrates exactly how imaging can redirect clinical reasoning before irreversible errors occur.
Initial Chest Imaging Findings
Chest radiography demonstrated an abnormal opacity involving the anterior segment of the left upper lobe.
Subsequent multidetector chest CT provided considerably greater diagnostic detail.
The principal abnormality was:
- approximately 14-mm cavitary lesion
- located in the anterior segment of the left upper lobe
Additional findings included:
- right lung ground-glass opacity,
- partially loculated left pleural effusion,
- enlarged pretracheal lymph node measuring approximately 11 mm.
Although each abnormality individually appears nonspecific, its combined pattern becomes diagnostically meaningful.
Interpreting the Cavitary Lesion
Pulmonary cavities represent gas-filled spaces developing within areas of pulmonary consolidation, masses, or nodules.
On CT, several imaging characteristics should immediately be evaluated.
1. Wall Thickness
Thin walls generally suggest:
- healed infection
- benign cyst
- congenital cavity
Intermediate walls suggest:
- chronic infection
- fungal disease
- granulomatous disease
Very thick, irregular walls increase suspicion for:
- squamous cell carcinoma
- cavitating metastasis
- abscess
2. Inner Margin
Radiologists examine whether the internal wall appears:
- smooth
- nodular
- irregular
- shaggy
Smooth inner walls often indicate chronic inflammatory disease.
Irregular nodularity raises concern for malignancy.
3. Surrounding Lung Parenchyma
Associated findings frequently determine the diagnosis more than the cavity itself.
Important associated abnormalities include:
- ground-glass opacity,
- tree-in-bud nodules,
- consolidation,
- bronchiectasis,
- eosinophilic infiltrates,
- pleural disease.
The coexistence of ground-glass opacity and pleural effusion in this patient suggested an inflammatory rather than neoplastic process.
Laboratory Clues That Changed the Differential
Radiologic interpretation should never occur in isolation.
Laboratory findings dramatically shifted diagnostic probability.
The patient demonstrated:
- marked eosinophilia,
- extremely elevated IgE concentration,
- negative autoimmune markers,
- negative acid-fast bacilli.
These laboratory abnormalities strongly suggested:
- parasitic infection,
- allergic pulmonary disease,
- eosinophilic lung disease,
rather than classic pulmonary tuberculosis.
For experienced thoracic radiologists, the combination of:
- cavitary lesion,
- eosinophilia,
- elevated IgE,
- migration history,
should immediately trigger consideration of pulmonary helminthic infection.
Differential Diagnosis of a Cavitary Lung Lesion
A cavitary pulmonary lesion should always be approached systematically rather than relying on a single presumptive diagnosis.
The principal differential diagnoses include:
| Disease | Typical CT Features |
|---|---|
| Pulmonary tuberculosis | Upper lobe cavities, tree-in-bud nodules |
| Lung abscess | Thick irregular cavity with air-fluid level |
| Cavitating lung cancer | Thick irregular wall, nodular margins |
| Septic emboli | Multiple peripheral cavitating nodules |
| Granulomatosis with polyangiitis | Multiple bilateral cavitary nodules |
| Fungal infection | Halo sign, cavitation during recovery |
| Pulmonary paragonimiasis | Peripheral nodules, cavities, pleural disease, migration tracks |
As demonstrated in this case, pulmonary paragonimiasis shares imaging features with nearly every disorder listed above, explaining why diagnostic confusion is common.
The Importance of Epidemiologic History
One of the most overlooked components of diagnostic imaging is patient history.
In this patient, one seemingly minor detail proved critical:
Recent immigration from Myanmar.
Myanmar remains within the endemic distribution of Paragonimus westermani, where infection is associated with ingestion of raw or undercooked freshwater crabs and crayfish.
Without considering travel or immigration history, the imaging findings alone could easily have been interpreted as tuberculosis or malignancy.
This highlights a fundamental principle in radiology:
Imaging patterns gain diagnostic value only when interpreted within their clinical and epidemiologic context.
Imaging Pearl
A cavitary lesion accompanied by eosinophilia, elevated serum IgE, pleural abnormalities, and a history of residence in an endemic region should prompt consideration of pulmonary paragonimiasis—even when sputum examinations are initially negative.
Failure to recognize this pattern may delay definitive diagnosis and expose patients to unnecessary treatment.
Beyond the Cavitary Lesion: Looking for the Hidden Imaging Pattern
Although the cavitary lesion initially attracted the greatest clinical attention, experienced thoracic radiologists recognize that pulmonary diagnosis rarely depends on a single abnormality.
Instead, the surrounding pulmonary environment often provides stronger diagnostic clues.
In this patient, chest CT demonstrated multiple additional findings beyond the 14-mm cavitary lesion located within the anterior segment of the left upper lobe.
These included:
- Ground-glass opacity in the right lung
- Mild mediastinal lymph node enlargement
- Partially loculated left pleural effusion
- Progressive disease despite anti-tuberculosis therapy
Rather than representing isolated abnormalities, these findings collectively formed a recognizable inflammatory pattern consistent with parasitic migration.
Understanding the CT Appearance of Pulmonary Paragonimiasis
Pulmonary paragonimiasis develops through several distinct pathological stages, each producing characteristic imaging findings.
Stage 1
Larval Migration
After ingestion of infective metacercariae from raw or undercooked freshwater crabs or crayfish, larvae penetrate the intestinal wall and migrate through the peritoneal cavity.
They subsequently traverse:
- diaphragm
- pleural cavity
- pulmonary parenchyma
During this migration, patients may exhibit:
- transient pulmonary infiltrates
- pleural effusion
- eosinophilic pneumonia
CT often demonstrates:
- peripheral ground-glass opacity
- patchy consolidation
- small pleural fluid collections
Stage 2
Pulmonary Invasion
As immature worms invade lung tissue, localized inflammation develops.
Typical CT findings include:
- peripheral nodules
- subpleural consolidation
- linear migration tracts
- surrounding hemorrhage
Migration tracts are considered one of the most characteristic imaging findings of pulmonary paragonimiasis.
These appear as:
- linear tubular opacities
- serpiginous subpleural bands
- connecting nodules
Although not present in every patient, they are highly suggestive when identified.
Stage 3
Adult Worm Encapsulation
Once adult worms mature, granulomatous inflammation surrounds the parasites.
The resulting imaging manifestations include:
- cavitary nodules
- cystic lesions
- bronchiectatic change
- fibrotic scars
These chronic lesions frequently resemble tuberculosis or necrotic malignancy.
Why Tuberculosis Was the Wrong Diagnosis
Pulmonary tuberculosis is often the first consideration when upper-lobe cavitary lesions are identified.
However, this case contained several inconsistencies.
Typical Pulmonary Tuberculosis
CT usually demonstrates:
- upper-lobe predominance
- tree-in-bud nodules
- centrilobular nodularity
- bronchogenic spread
- satellite lesions
Laboratory findings often reveal:
- positive acid-fast bacilli
- positive PCR
- granulomatous inflammation
Clinical improvement generally occurs after initiation of anti-tuberculosis medication.
Findings in This Patient
Instead, the present patient demonstrated:
- negative sputum examination
- marked eosinophilia
- IgE elevation
- progressive imaging abnormalities
- failure of empirical tuberculosis treatment
These findings argued strongly against tuberculosis despite the positive tuberculin skin test.
The Critical Laboratory Clues
Radiologists sometimes underestimate laboratory information.
However, several laboratory abnormalities dramatically altered the diagnostic probability.
Absolute Eosinophilia
The eosinophil count reached approximately 2,300/mm³, far exceeding the normal range.
Marked eosinophilia should immediately prompt consideration of:
- parasitic disease
- eosinophilic pneumonia
- allergic bronchopulmonary aspergillosis
- hypereosinophilic syndrome
- drug reaction
It is not a typical feature of pulmonary tuberculosis.
Extremely Elevated IgE
Serum IgE measured approximately 9,000 IU/mL, representing a striking elevation above the reference range.
Such values strongly favor:
- helminthic infection
- allergic disorders
- eosinophilic pulmonary disease
rather than bacterial infection or malignancy.
Bronchoalveolar Lavage: The Diagnostic Breakthrough
Despite extensive evaluation, sputum examinations remained negative.
The diagnostic turning point occurred after bronchoscopy.
Bronchoalveolar lavage fluid underwent Papanicolaou staining, revealing characteristic brown oval eggs with an operculum (lid-like structure), findings consistent with Paragonimus westermani.
This observation established the definitive diagnosis.
Importantly, sputum microscopy alone may be falsely negative, particularly during early infection or when egg production is limited.
Bronchoalveolar lavage therefore serves as an important diagnostic adjunct in selected patients.
Differential Diagnosis: Imaging Comparison
| Disease | Typical CT Pattern | Distinguishing Clues |
|---|---|---|
| Pulmonary Tuberculosis | Upper-lobe cavities, tree-in-bud nodules | Positive AFB/PCR, response to anti-TB therapy |
| Lung Abscess | Thick cavity with air-fluid level | Fever, bacterial infection |
| Squamous Cell Carcinoma | Thick irregular cavity | Smoking history, PET uptake |
| Granulomatosis with Polyangiitis | Multiple cavitary nodules | Positive ANCA, systemic vasculitis |
| Septic Emboli | Multiple bilateral peripheral cavitating nodules | Endocarditis, bacteremia |
| Fungal Infection | Halo sign, reverse halo sign | Immunocompromised host |
| Pulmonary Paragonimiasis | Peripheral nodules, pleural disease, cavitary lesions, migration tracks | Eosinophilia, elevated IgE, endemic exposure |
How Artificial Intelligence Could Improve Diagnosis
Modern thoracic AI systems have demonstrated remarkable performance in detecting pulmonary nodules, tuberculosis, pneumonia, and lung cancer.
However, parasitic infections remain underrepresented within current deep-learning datasets.
Future AI systems should incorporate multimodal clinical information, including:
- CT morphology
- laboratory values
- eosinophil count
- serum IgE
- geographic origin
- dietary exposure
- travel history
Rather than relying exclusively on image recognition, next-generation clinical AI will function as an integrated diagnostic reasoning system.
For this patient, an intelligent clinical decision-support platform might have generated alerts such as:
Persistent cavitary lesion with eosinophilia and markedly elevated IgE detected. Consider parasitic infection, including pulmonary paragonimiasis, particularly in patients from endemic regions.
Such AI-assisted recommendations could substantially reduce diagnostic delay and unnecessary treatment.
Radiology Reporting Pearl
When interpreting a cavitary lung lesion, radiologists should avoid limiting the impression to a single presumptive diagnosis.
Instead, reports should integrate imaging findings with relevant clinical features.
A structured impression for this case might read:
Left upper lobe cavitary lesion associated with right-sided ground-glass opacity, pleural effusion, eosinophilia, and markedly elevated serum IgE. Imaging findings favor an inflammatory or parasitic etiology over pulmonary malignancy. In an appropriate epidemiologic setting, pulmonary paragonimiasis should be included in the differential diagnosis. Bronchoscopic evaluation and parasitic studies are recommended.
This approach provides clinicians with actionable guidance while preserving an appropriately broad differential diagnosis.
Definitive Treatment
Following bronchoalveolar lavage, Papanicolaou staining demonstrated characteristic operculated eggs consistent with Paragonimus westermani, confirming the diagnosis.
The patient was treated with praziquantel, the current first-line antiparasitic therapy for pulmonary paragonimiasis.
Within two months:
- Hemoptysis completely resolved.
- Rust-colored sputum disappeared.
- Follow-up chest imaging demonstrated marked radiologic improvement.
- Clinical symptoms resolved without additional intervention.
The rapid response following appropriate antiparasitic therapy strongly supported the final diagnosis and highlighted the consequences of the initial diagnostic delay.
Why Early Diagnosis Matters
Delayed recognition of pulmonary paragonimiasis can expose patients to unnecessary investigations and treatments.
Potential consequences include:
- Prolonged anti-tuberculosis therapy
- Repeated bronchoscopic procedures
- CT-guided lung biopsy
- Surgical wedge resection
- Increased healthcare costs
- Persistent symptoms
- Progressive pulmonary fibrosis
- Reduced quality of life
From a radiology perspective, recognizing the disease early may prevent invasive procedures that carry significant patient risk.
Expected Radiologic Evolution After Treatment
Radiologic improvement generally parallels clinical recovery but may occur over several weeks or months.
Early Follow-Up (1–3 Months)
Expected findings include:
- Decreased surrounding inflammation
- Reduction in ground-glass opacity
- Resolution of pleural effusion
- Shrinkage of cavitary lesions
- Improvement in bronchial wall thickening
Intermediate Follow-Up (3–6 Months)
Residual findings may include:
- Small fibrotic scars
- Thin-walled residual cysts
- Mild pleural thickening
- Focal bronchiectasis
Late Follow-Up
Many patients ultimately demonstrate:
- Near-complete radiologic resolution
- Minimal residual fibrosis
- No recurrent cavitary disease
The degree of permanent structural change largely depends on the duration of infection before treatment.
Practical Imaging Approach for Radiologists
When evaluating a cavitary lung lesion, a structured workflow improves diagnostic accuracy.
Step 1: Analyze the Cavity
Evaluate:
- Wall thickness
- Margin characteristics
- Internal architecture
- Air-fluid level
- Calcification
- Satellite lesions
Step 2: Evaluate the Surrounding Lung
Look for:
- Ground-glass opacity
- Tree-in-bud nodules
- Consolidation
- Pleural abnormalities
- Linear migration tracks
- Bronchiectasis
Step 3: Review Clinical Data
Ask:
- Is eosinophilia present?
- Is IgE elevated?
- Is there a fever?
- Has empirical therapy failed?
- Is there immunosuppression?
Step 4: Consider Epidemiology
Important questions include:
- Has the patient recently immigrated?
- Has there been travel to endemic regions?
- Has the patient consumed raw freshwater crabs or crayfish?
- Are parasitic diseases prevalent in the patient's country of origin?
Step 5: Recommend Appropriate Next Steps
Depending on the imaging pattern, recommendations may include:
- Bronchoscopy
- Bronchoalveolar lavage
- Serologic testing
- Stool examination
- Repeat chest CT
- Infectious disease consultation
Artificial Intelligence and the Future of Thoracic Imaging
From Pattern Recognition to Clinical Reasoning
Current AI algorithms excel at detecting pulmonary nodules, tuberculosis, pneumonia, emphysema, and lung cancer.
However, rare parasitic diseases remain underrepresented in most training datasets.
The next generation of radiology AI should integrate:
Imaging Features
- Cavitary morphology
- Nodule distribution
- Pleural abnormalities
- Ground-glass opacity
- Migration tracks
Laboratory Features
- Absolute eosinophil count
- Total IgE
- White blood cell differential
- Serologic findings
Clinical Features
- Age
- Geographic origin
- Travel history
- Dietary exposure
- Previous treatment response
Longitudinal Imaging
Rather than analyzing a single CT examination, AI should compare serial studies to identify:
- Disease progression
- Failure of empirical therapy
- Unexpected imaging evolution
- Treatment response
This multimodal approach represents the future of precision radiology.
AI-Assisted Clinical Decision Support
Imagine an enterprise radiology platform integrated with PACS, RIS, EMR, and laboratory systems.
After analyzing CT images, the AI could automatically retrieve:
- Eosinophil count
- Serum IgE
- Country of origin
- Travel history
- Previous imaging reports
- Microbiology results
The AI-generated recommendation might state:
Persistent cavitary lesion associated with marked eosinophilia and elevated serum IgE. Pulmonary tuberculosis appears less likely. Consider pulmonary paragonimiasis or another helminthic infection. Bronchoalveolar lavage or serologic testing is recommended.
Such intelligent decision support would augment—not replace—the expertise of radiologists and clinicians.
Clinical Pearls
✔ Not every upper-lobe cavity represents tuberculosis.
✔ Marked eosinophilia should immediately broaden the differential diagnosis.
✔ Elevated serum IgE strongly favors allergic or parasitic disease.
✔ Migration history is often more informative than imaging alone.
✔ Pulmonary paragonimiasis may mimic malignancy, fungal infection, septic emboli, or vasculitis.
✔ Negative sputum examinations do not exclude parasitic infection.
✔ Bronchoalveolar lavage may establish the diagnosis when sputum studies are inconclusive.
✔ Appropriate antiparasitic therapy frequently leads to rapid clinical and radiologic recovery.
Key Learning Points
- Pulmonary paragonimiasis remains an important cause of chronic hemoptysis worldwide.
- Cavitary lung lesions require systematic differential diagnosis.
- CT findings alone are rarely diagnostic.
- Integration of imaging, laboratory data, and epidemiologic history is essential.
- Bronchoalveolar lavage plays a critical role when sputum examinations are negative.
- Early recognition prevents unnecessary anti-tuberculosis treatment and invasive procedures.
- Future AI systems should integrate multimodal clinical information rather than relying solely on image recognition.
Frequently Asked Questions (FAQ)
Is pulmonary paragonimiasis contagious?
No. Human-to-human transmission does not occur. Infection results from ingesting raw or undercooked freshwater crustaceans containing infective larvae.
Can pulmonary paragonimiasis mimic lung cancer?
Yes. Cavitary nodules, irregular masses, and pleural abnormalities may closely resemble primary lung malignancy.
Why was tuberculosis initially suspected?
The patient had chronic hemoptysis, an upper-lobe cavitary lesion, and a positive tuberculin skin test—features commonly associated with pulmonary tuberculosis.
What laboratory finding should immediately raise suspicion for parasitic infection?
Marked eosinophilia together with significantly elevated serum IgE levels.
What imaging modality is most useful?
High-resolution multidetector chest CT remains the primary imaging modality for evaluating cavitary lung disease.
Conclusion
Pulmonary paragonimiasis is an uncommon but clinically significant cause of cavitary lung disease that continues to challenge radiologists and clinicians, particularly in regions where tuberculosis is prevalent or among patients from endemic areas. This case underscores the importance of resisting premature diagnostic closure. A cavitary lesion should never be interpreted in isolation; instead, imaging findings must be integrated with laboratory results, epidemiologic history, and clinical evolution.
The combination of persistent hemoptysis, eosinophilia, markedly elevated serum IgE, failure of empirical anti-tuberculosis therapy, and bronchoalveolar lavage demonstrating Paragonimus westermani ultimately led to the correct diagnosis and successful treatment.
As radiology enters the era of artificial intelligence, the future lies not only in detecting abnormalities but in synthesizing imaging with laboratory and clinical data to generate context-aware differential diagnoses. AI-assisted decision support has the potential to reduce diagnostic delay, avoid unnecessary invasive procedures, and improve outcomes for patients with rare but important diseases such as pulmonary paragonimiasis.
Ultimately, the most effective diagnostic tool remains the partnership among an experienced radiologist, thoughtful clinical reasoning, and intelligent technology.
AI Interpretation Box
AI Radiology Confidence Assessment
| Disease | Estimated Diagnostic Confidence |
|---|---|
| Pulmonary Paragonimiasis | 94% |
| Pulmonary Tuberculosis | 48% |
| Lung Abscess | 34% |
| Granulomatosis with Polyangiitis | 19% |
| Cavitating Lung Cancer | 16% |
| Septic Emboli | 12% |
Educational Note: These values are illustrative and demonstrate how a future multimodal clinical AI system might prioritize differential diagnoses by combining imaging findings with laboratory and epidemiologic information. They are not derived from a validated clinical algorithm.
Imaging Checklist for Thoracic Radiologists
When interpreting any cavitary pulmonary lesion, systematically evaluate:
Cavity Characteristics
- Wall thickness
- Wall regularity
- Internal nodularity
- Air-fluid level
- Calcification
- Number of cavities
Distribution
- Upper lobe
- Lower lobe
- Central
- Peripheral
- Bilateral
- Multifocal
Associated Findings
- Ground-glass opacity
- Tree-in-bud nodules
- Consolidation
- Pleural effusion
- Pleural thickening
- Lymphadenopathy
- Migration tracks
- Bronchiectasis
Laboratory Correlation
- Eosinophilia
- Serum IgE
- ESR/CRP
- Acid-fast bacilli
- Fungal markers
- Autoimmune serology
Clinical History
- Travel history
- Immigration history
- Dietary exposure
- Immunosuppression
- Smoking history
- Previous tuberculosis
- Prior antimicrobial treatment
Quiz
Question 1
A 52-year-old patient presents with chronic hemoptysis, eosinophilia, elevated IgE, and an upper-lobe cavitary lesion. Which diagnosis should be strongly considered?
A. Small-cell lung carcinoma
B. Pulmonary edema
C. Pulmonary paragonimiasis
D. Sarcoidosis
Answer: C
Question 2
Which laboratory abnormality most strongly supports a diagnosis of pulmonary paragonimiasis?
A. Hypercalcemia
B. Leukopenia
C. Marked eosinophilia
D. Elevated troponin
Answer: C
Question 3
Which procedure confirmed the diagnosis in this case?
A. CT-guided biopsy
B. PET/CT
C. MRI
D. Bronchoalveolar lavage cytology
Answer: D
Internal Linking Strategy
Hub Page
- Thoracic Imaging
Recommended Cluster Articles
- Cavitary Lung Lesions: A Comprehensive CT Differential Diagnosis
- CT Imaging of Pulmonary Tuberculosis
- AI in Thoracic Radiology
- Hemoptysis: Imaging Evaluation and Clinical Workflow
- Eosinophilic Lung Diseases
- Pleural Diseases on CT
- Parasitic Infections of the Lung
- Bronchoalveolar Lavage in Pulmonary Diagnosis
Suggested Figure List
Figure 1. Chest radiograph demonstrating a left upper lobe opacity.
Figure 2. Axial chest CT showing a 14-mm cavitary lesion in the left upper lobe.
Figure 3. Papanicolaou-stained bronchoalveolar lavage specimen demonstrating Paragonimus westermani eggs.
Figure 4. Diagnostic workflow for chronic hemoptysis with cavitary lung lesions.
Figure 5. AI-assisted diagnostic algorithm integrating CT morphology, laboratory findings, and epidemiologic history.
Final Take-Home Message
Pulmonary paragonimiasis should remain an essential consideration whenever chronic hemoptysis coexists with cavitary lung lesions, eosinophilia, elevated serum IgE, and epidemiologic risk factors. This case reinforces that high-quality radiologic diagnosis extends beyond image interpretation alone. By integrating CT findings with laboratory data, patient history, and emerging AI-assisted clinical decision support, radiologists can improve diagnostic accuracy, reduce unnecessary treatments, and deliver more precise, patient-centered care.
Appendix A. Structured Radiology Report(Sample)
Examination: Contrast-Enhanced Chest CT
Clinical Indication:
51-year-old male with chronic hemoptysis for six months, rust-colored sputum, persistent cough, eosinophilia, and failure of empirical anti-tuberculosis treatment. Recent immigration from an endemic region.
Findings
Lungs
- A 14-mm cavitary lesion is identified within the anterior segment of the left upper lobe.
- Mild surrounding inflammatory opacity is present.
- Patchy ground-glass opacity is seen within the right lung.
- No diffuse miliary nodules are identified.
Pleura
- Small, partially loculated left pleural effusion.
Mediastinum
- Mild enlargement of a pretracheal lymph node measuring approximately 11 mm.
Airways
- No central airway obstruction.
Upper Abdomen
- No significant abnormality is demonstrated on the imaged portions.
Impression
- Left upper lobe cavitary pulmonary lesion.
- Associated contralateral ground-glass opacity and left pleural effusion.
- Imaging findings combined with marked eosinophilia and elevated IgE strongly suggest a parasitic pulmonary infection.
- Pulmonary paragonimiasis should be included among the leading differential diagnoses.
- Recommend bronchoscopy with bronchoalveolar lavage and parasitologic evaluation.
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