Clinical features of dcld
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"diffuse cystic lung disease"
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diffuse cystic lung disease clinical features LAM Birt-Hogg-Dube review
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DCLD (diffuse cystic lung disease) refers to disorders causing multiple, bilateral, air-filled lung cysts. Clinical presentation varies widely and may be incidental.
Common clinical features
- Progressive exertional dyspnea, often the most frequent symptom
- Recurrent spontaneous pneumothorax: acute pleuritic chest pain and sudden breathlessness, sometimes the first presentation
- Chronic cough, usually dry
- Reduced exercise tolerance and fatigue
- Hemoptysis, less common, particularly in lymphangioleiomyomatosis (LAM)
- Chylous pleural effusion (chylothorax) or chylous ascites in LAM
- Some patients remain asymptomatic until cysts are found on chest CT
Important extrapulmonary clues
These help identify the cause:
| Disorder | Typical clinical clues |
|---|---|
| LAM | Almost exclusively women, usually of reproductive age; dyspnea, recurrent pneumothorax, chylothorax, hemoptysis; renal angiomyolipoma; may be associated with tuberous sclerosis complex |
| Birt-Hogg-Dubé syndrome | Recurrent or familial pneumothorax; skin fibrofolliculomas; family history of renal tumors; renal cell carcinoma risk |
| Pulmonary Langerhans cell histiocytosis | Current or former cigarette smoker; cough, dyspnea, pneumothorax; may have constitutional symptoms; bone, skin, or diabetes insipidus in multisystem disease |
| Lymphocytic interstitial pneumonia | Often associated with Sjögren syndrome, HIV, or other autoimmune/immunodeficiency states; dry cough and dyspnea; sicca symptoms, parotid enlargement, arthralgia |
| Amyloidosis / light-chain deposition disease | Cysts with nodules; may have systemic plasma-cell or lymphoproliferative disease features |
Physical examination
Physical findings can be normal early. Advanced disease may show:
- Tachypnea or hypoxemia
- Reduced breath sounds in pneumothorax or pleural effusion
- Fine crackles when interstitial involvement coexists
- Signs of an associated systemic disease, such as skin lesions in Birt-Hogg-Dubé syndrome or tuberous sclerosis.
High-yield point: In a young woman with diffuse cysts and recurrent pneumothorax, think LAM. In someone with recurrent/familial pneumothorax plus skin papules or renal tumors, think Birt-Hogg-Dubé syndrome. This clinical review outlines the broad differential and Birt-Hogg-Dubé clues.
Murray & Nadel's Textbook of Respiratory Medicine, 2-Volume Set, p. 4956
Clinical features of decompensated liver disease
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"decompensated cirrhosis" AND clinical features
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decompensated cirrhosis clinical features ascites encephalopathy variceal bleeding authoritative
Decompensated liver disease usually means cirrhosis has progressed to clinically evident liver failure and/or portal hypertension.
Major defining features
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Ascites
- Abdominal distension, weight gain, early satiety, ankle edema
- May become tense and cause dyspnea
- Can be complicated by spontaneous bacterial peritonitis, presenting with fever, abdominal pain, confusion, or renal dysfunction.
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Variceal upper gastrointestinal bleeding
- Hematemesis, coffee-ground vomiting, melena, dizziness/syncope, shock
- Due to portal hypertension and esophagogastric varices.
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Hepatic encephalopathy
- Sleep-pattern reversal, impaired concentration, personality or behavior change
- Confusion, drowsiness, asterixis, disorientation, and possibly coma.
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Jaundice / worsening synthetic liver failure
- Yellow sclera and skin, dark urine, pale stools, pruritus
- Easy bruising or bleeding due to coagulopathy.
Other common features
- Fatigue, anorexia, nausea, weight loss
- Muscle wasting (sarcopenia), frailty, malnutrition
- Peripheral edema
- Splenomegaly and thrombocytopenia
- Spider angiomas, palmar erythema, gynecomastia, testicular atrophy in men
- Caput medusae or abdominal-wall collateral veins
- Recurrent infections and sepsis
- Hepatorenal syndrome: oliguria and rising creatinine
- Hepatopulmonary syndrome or portopulmonary hypertension: hypoxemia and dyspnea
- Hepatocellular carcinoma may present with weight loss, pain, worsening ascites, or sudden decompensation.
Exam definition: Decompensation is classically identified by ascites, variceal hemorrhage, hepatic encephalopathy, or jaundice. Ascites is the most frequent manifestation. Goldman-Cecil Medicine International Edition, 2 Volume Set, p. 3934.
Urgent features: hematemesis/melena, new confusion, fever with ascites, marked jaundice, hypotension, or reduced urine output require emergency assessment. The NIH cirrhosis overview similarly lists ascites, jaundice, encephalopathy, and variceal bleeding as defining transition events.
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