Hereditary and Metabolic Liver Diseases

Hereditary and Metabolic Liver Diseases

Overview

3 disorders → cirrhosis via toxic accumulation: HAEMOCHROMATOSIS(iron), WILSON’S(copper), α1-AT DEFICIENCY(misfolded protein). Each has distinctive extra-hepatic triad/pattern.

Haemochromatosis (pigment cirrhosis)

Iron-storage disorder, excess parenchymal accumulation→tissue damage (liver/pancreas/heart/pituitary). TRIAD: micronodular pigment cirrhosis + diabetes + skin pigmentation = “BRONZE DIABETES.” Males predominate/present earlier (women protected by menstrual iron loss).

2 forms:

1. IDIOPATHIC(primary,genetic) — AR, HFE gene overexpression(chr6, near HLA)→complexes with transferrin receptor on intestinal crypt cells→excess lifelong dietary iron absorption
2. SECONDARY(acquired) — thalassaemia, sideroblastic anaemia, alcoholic cirrhosis, multiple transfusions

Etiopathogenesis: normal body iron 3-4g, absorption=loss(1mg/day men,1.5mg/day menstruating women). Haemochromatosis: ≥4mg/day — ↑serum iron(N125mg/dl), ↑transferrin saturation(N30%). Primary: genetic defect at intestinal absorption OR post-absorption excretion level; excess iron→parenchymal cytoplasm(liver/pancreas/spleen/heart/endocrine)→iron-laden lysosomes+lipid peroxidation damage. Secondary: ineffective erythropoiesis, defective Hb synthesis, transfusions, alcohol-enhanced absorption (AFRICAN/BANTU SIDEROSIS — iron-vessel home-brew) — RE+liver iron ↑ but usually insufficient for tissue damage.

Morphology: ferritin/haemosiderin = golden-yellow granules, haemosiderin+ Prussian blue. Worst: liver+pancreas. Liver: hepatocyte pigment→periportal→↑fibrosis→MICRONODULAR CIRRHOSIS, chocolate-brown nodular gross. Pancreas: less intense, acinar+islet cells, interstitial fibrosis+atrophy→diabetes.

Clinical: skin pigmentation(90% presenting feature), diabetes, hepatic/cardiac dysfunction, arthropathy, hypogonadism. Dx: serum iron, transferrin sat%, ferritin, chelatable iron(desferrioxamine), biopsy. HCC = late complication.

Wilson’s disease (hepatolenticular degeneration)

AR copper metabolism disorder — toxic accumulation liver/brain/eye. TRIAD: cirrhosis + bilateral basal ganglia degeneration + KAYSER-FLEISCHER RINGS (corneal). Age 5-30yrs. Initial=hepatic (jaundice/hepatomegaly)→later neuropsychiatric+K-F rings.

Pathogenesis: normal — dietary Cu absorbed(stomach/duodenum)→liver→incorporated into α2-globulin=CERULOPLASMIN→biliary excretion. Wilson’s: absorption/transport NORMAL but Cu ACCUMULATES in liver (not excreted) — defect = ATP7B gene mutation (chr13, hepatic copper-excreting gene). Storage capacity exceeded→Cu released→extrahepatic deposition(brain/eyes). KIDNEY Cu deposition = NO serious dysfunction (key exception).

Biochemistry: ↓serum ceruloplasmin (↓apoceruloplasmin synthesis+defective lysosomal Cu mobilisation); ↑hepatic Cu(biopsy); ↑urinary Cu excretion. SERUM COPPER itself = NOT diagnostically useful (varies low-normal-high by stage) — key distinguishing fact from ceruloplasmin/tissue Cu.

Morphology: liver=fatty change→acute/chronic active hepatitis→submassive necrosis→MACRONODULAR cirrhosis, ±Mallory bodies. Periportal hepatocyte Cu (reddish granules, rubeanic acid/rhodamine stain). Brain=basal ganglia toxic injury. Cornea=Descemet’s membrane Cu(K-F rings). Kidney=fatty/hydropic change.

α1-Antitrypsin deficiency

AUTOSOMAL CODOMINANT — homozygous state→liver disease(cirrhosis)/lung disease(emphysema)/both. α1-AT=hepatocyte rough ER glycoprotein, MOST POTENT protease inhibitor(Pi), gene chr14 (same region as Ig light chains). PiMM=normal. PiZZ homozygote=commonest abnormal, causes liver+lung disease. PiSS/Pi-null=near-total deficiency. PiMZ/PiSZ(intermediate)→predisposed to HCC.

Presents: respiratory(emphysema) and/or liver dysfunction. Neonates: variable cholestatic jaundice. Adolescence: hepatitis or (usually well-compensated) cirrhosis.

Morphology: lung=emphysema. Liver by age: neonatal=neonatal hepatitis(acute/“pure” cholestasis); childhood/adolescence=micro/macronodular cirrhosis, DIAGNOSTIC=intracellular acidophilic PAS-POSITIVE GLOBULES in periportal hepatocytes (= dilated rough ER ultrastructurally).

Clinical relevance

All 3 converge on cirrhosis via DIFFERENT accumulating substances — anchor each to its DEFINING triad/marker, not the shared endpoint: haemochromatosis=bronze diabetes triad; Wilson’s=hepato-lenticular-corneal triad; α1-AT deficiency=liver+lung dual-organ from ONE gene. Wilson’s vs Indian childhood cirrhosis (cross-ref Cirrhosis of the Liver) = both ↑hepatic copper but differ in age/fatty-change/regeneration — recurring exam trap. Serum-copper-useless-but-ceruloplasmin-useful = frequently confused pair in Wilson’s — ceruloplasmin(↓)+tissue/urinary copper(↑) are reliable, serum copper is NOT. PiZZ = paradigm case of ONE protein deficiency → TWO-organ pathology via TWO different mechanisms (misfolded-protein accumulation=liver cirrhosis; lost protease inhibition=lung emphysema).

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Hereditary and Metabolic Liver Diseases

Overview

3 disorders → cirrhosis via toxic accumulation: HAEMOCHROMATOSIS(iron), WILSON’S(copper), α1-AT DEFICIENCY(misfolded protein). Each has distinctive extra-hepatic triad/pattern.

Haemochromatosis (pigment cirrhosis)

Iron-storage disorder, excess parenchymal accumulation→tissue damage (liver/pancreas/heart/pituitary). TRIAD: micronodular pigment cirrhosis + diabetes + skin pigmentation = “BRONZE DIABETES.” Males predominate/present earlier (women protected by menstrual iron loss).

2 forms:

1. IDIOPATHIC(primary,genetic) — AR, HFE gene overexpression(chr6, near HLA)→complexes with transferrin receptor on intestinal crypt cells→excess lifelong dietary iron absorption
2. SECONDARY(acquired) — thalassaemia, sideroblastic anaemia, alcoholic cirrhosis, multiple transfusions

Etiopathogenesis: normal body iron 3-4g, absorption=loss(1mg/day men,1.5mg/day menstruating women). Haemochromatosis: ≥4mg/day — ↑serum iron(N125mg/dl), ↑transferrin saturation(N30%). Primary: genetic defect at intestinal absorption OR post-absorption excretion level; excess iron→parenchymal cytoplasm(liver/pancreas/spleen/heart/endocrine)→iron-laden lysosomes+lipid peroxidation damage. Secondary: ineffective erythropoiesis, defective Hb synthesis, transfusions, alcohol-enhanced absorption (AFRICAN/BANTU SIDEROSIS — iron-vessel home-brew) — RE+liver iron ↑ but usually insufficient for tissue damage.

Morphology: ferritin/haemosiderin = golden-yellow granules, haemosiderin+ Prussian blue. Worst: liver+pancreas. Liver: hepatocyte pigment→periportal→↑fibrosis→MICRONODULAR CIRRHOSIS, chocolate-brown nodular gross. Pancreas: less intense, acinar+islet cells, interstitial fibrosis+atrophy→diabetes.

Clinical: skin pigmentation(90% presenting feature), diabetes, hepatic/cardiac dysfunction, arthropathy, hypogonadism. Dx: serum iron, transferrin sat%, ferritin, chelatable iron(desferrioxamine), biopsy. HCC = late complication.

Wilson’s disease (hepatolenticular degeneration)

AR copper metabolism disorder — toxic accumulation liver/brain/eye. TRIAD: cirrhosis + bilateral basal ganglia degeneration + KAYSER-FLEISCHER RINGS (corneal). Age 5-30yrs. Initial=hepatic (jaundice/hepatomegaly)→later neuropsychiatric+K-F rings.

Pathogenesis: normal — dietary Cu absorbed(stomach/duodenum)→liver→incorporated into α2-globulin=CERULOPLASMIN→biliary excretion. Wilson’s: absorption/transport NORMAL but Cu ACCUMULATES in liver (not excreted) — defect = ATP7B gene mutation (chr13, hepatic copper-excreting gene). Storage capacity exceeded→Cu released→extrahepatic deposition(brain/eyes). KIDNEY Cu deposition = NO serious dysfunction (key exception).

Biochemistry: ↓serum ceruloplasmin (↓apoceruloplasmin synthesis+defective lysosomal Cu mobilisation); ↑hepatic Cu(biopsy); ↑urinary Cu excretion. SERUM COPPER itself = NOT diagnostically useful (varies low-normal-high by stage) — key distinguishing fact from ceruloplasmin/tissue Cu.

Morphology: liver=fatty change→acute/chronic active hepatitis→submassive necrosis→MACRONODULAR cirrhosis, ±Mallory bodies. Periportal hepatocyte Cu (reddish granules, rubeanic acid/rhodamine stain). Brain=basal ganglia toxic injury. Cornea=Descemet’s membrane Cu(K-F rings). Kidney=fatty/hydropic change.

α1-Antitrypsin deficiency

AUTOSOMAL CODOMINANT — homozygous state→liver disease(cirrhosis)/lung disease(emphysema)/both. α1-AT=hepatocyte rough ER glycoprotein, MOST POTENT protease inhibitor(Pi), gene chr14 (same region as Ig light chains). PiMM=normal. PiZZ homozygote=commonest abnormal, causes liver+lung disease. PiSS/Pi-null=near-total deficiency. PiMZ/PiSZ(intermediate)→predisposed to HCC.

Presents: respiratory(emphysema) and/or liver dysfunction. Neonates: variable cholestatic jaundice. Adolescence: hepatitis or (usually well-compensated) cirrhosis.

Morphology: lung=emphysema. Liver by age: neonatal=neonatal hepatitis(acute/“pure” cholestasis); childhood/adolescence=micro/macronodular cirrhosis, DIAGNOSTIC=intracellular acidophilic PAS-POSITIVE GLOBULES in periportal hepatocytes (= dilated rough ER ultrastructurally).

Clinical relevance

All 3 converge on cirrhosis via DIFFERENT accumulating substances — anchor each to its DEFINING triad/marker, not the shared endpoint: haemochromatosis=bronze diabetes triad; Wilson’s=hepato-lenticular-corneal triad; α1-AT deficiency=liver+lung dual-organ from ONE gene. Wilson’s vs Indian childhood cirrhosis (cross-ref Cirrhosis of the Liver) = both ↑hepatic copper but differ in age/fatty-change/regeneration — recurring exam trap. Serum-copper-useless-but-ceruloplasmin-useful = frequently confused pair in Wilson’s — ceruloplasmin(↓)+tissue/urinary copper(↑) are reliable, serum copper is NOT. PiZZ = paradigm case of ONE protein deficiency → TWO-organ pathology via TWO different mechanisms (misfolded-protein accumulation=liver cirrhosis; lost protease inhibition=lung emphysema).

Hereditary and Metabolic Liver Diseases

Overview

Three inherited/metabolic disorders converge on cirrhosis through toxic accumulation of a specific substance in the liver: haemochromatosis (iron), Wilson’s disease (copper), and α1-antitrypsin deficiency (a misfolded protein). Each has a distinctive systemic triad or pattern beyond the liver alone.

Pigment Cirrhosis in Haemochromatosis

An iron-storage disorder with excessive parenchymal iron accumulation causing tissue damage and functional insufficiency of liver, pancreas, heart, and pituitary. Classic triad: micronodular pigment cirrhosis + diabetes mellitus + skin pigmentation — hence “bronze diabetes.” Males predominate and present earlier (women have physiologic iron loss via menstruation, delaying effects).

Two forms:

1. Idiopathic (primary, genetic) — autosomal recessive; overexpression of the HFE gene (chromosome 6, near the HLA locus), which normally regulates intestinal iron absorption. Mutated HFE complexes with the transferrin receptor on intestinal crypt cells, causing excessive lifelong dietary iron absorption.
2. Secondary (acquired) — gross iron overload secondary to other disease: thalassaemia, sideroblastic anaemias, alcoholic cirrhosis, multiple transfusions.

Etiopathogenesis: normal body iron content 3–4 g, absorption matched to loss (~1 mg/day men, ~1.5 mg/day menstruating women). In haemochromatosis, absorption rises to ≥4 mg/day — reflected in elevated serum iron (normal ~125 mg/dl) and increased transferrin saturation (normal 30%). In primary disease, the genetic defect lies at the intestinal mucosal absorption level or the post-absorptive excretion level; excess iron deposits mainly in parenchymal cell cytoplasm (liver, pancreas, spleen, heart, endocrine glands); tissue injury results from iron-laden lysosomes and iron-driven lipid peroxidation of organelles. In secondary disease, causes include ineffective erythropoiesis, defective haemoglobin synthesis, multiple transfusions, and alcohol-enhanced iron absorption (e.g. African/Bantu siderosis from home-brewed beverages made in iron vessels) — RE system and liver iron storage rises, but the magnitude is generally insufficient to cause tissue damage.

Morphology: excess iron deposits as ferritin/haemosiderin — golden-yellow cytoplasmic pigment granules, haemosiderin positive with Prussian blue. Most affected: liver and pancreas, less so heart, endocrine glands, skin, synovium, testis. Liver: pigment in hepatocytes (less in Kupffer cells/bile duct epithelium), initially periportal with increasing portal fibrosis, eventually micronodular cirrhosis; chocolate-brown, nodular liver grossly. Pancreas: less intense pigmentation (acinar/islet cells), diffuse interstitial fibrosis and parenchymal atrophy → diabetes mellitus.

Clinical features: skin pigmentation, diabetes, hepatic/cardiac dysfunction, arthropathy, hypogonadism. Bronze pigmentation is the presenting feature in ~90%. Diagnosis: serum iron, transferrin saturation %, serum ferritin, chelatable iron stores (desferrioxamine), liver biopsy. Hepatocellular carcinoma is a late complication of haemochromatosis-induced cirrhosis.

Cirrhosis in Wilson’s Disease (Hepatolenticular Degeneration)

Autosomal recessive disorder of copper metabolism — toxic copper accumulation chiefly in liver, brain, eye. Classic triad:

1. Cirrhosis of the liver.
2. Bilateral basal ganglia degeneration.
3. Kayser-Fleischer rings — greenish-brown corneal periphery pigmentation.

Manifests predominantly in children/young adults (5–30 years). Initial manifestations relate to liver involvement (jaundice, hepatomegaly — hepatic form); later, progressive neuropsychiatric changes and Kayser-Fleischer rings appear.

Pathogenesis (vs normal copper metabolism): normally, dietary copper (exceeding requirement) is absorbed via stomach/duodenum, transported to liver, incorporated into α2-globulin to form ceruloplasmin, and excreted via bile — most plasma copper circulates as ceruloplasmin, with minute urinary excretion. In Wilson’s disease, absorption/hepatic transport are normal, but copper accumulates in the liver rather than being excreted — the defect is a mutation in the ATP7B gene (chromosome 13), the normal hepatic copper-excreting gene. Once hepatocyte storage capacity is exceeded, copper releases into circulation and deposits in extrahepatic tissues (brain, eyes, others) — renal copper deposition, notably, does not cause serious renal dysfunction.

Biochemical abnormalities: decreased serum ceruloplasmin (impaired apoceruloplasmin synthesis + defective lysosomal copper mobilisation); increased hepatic copper on biopsy; increased urinary copper excretion. Serum copper level itself is not diagnostically useful (varies low-normal-high by disease stage).

Morphology: liver shows fatty change, acute/chronic active hepatitis, submassive necrosis, and macronodular cirrhosis, in varying grades; Mallory bodies in some cases. Copper deposits in periportal hepatocytes as reddish cytoplasmic granules/colouration (rubeanic acid/rhodamine stains). Brain: toxic neuronal injury in basal ganglia. Cornea: copper deposits in Descemet’s membrane (Kayser-Fleischer rings). Kidney: fatty/hydropic change.

Cirrhosis in α1-Antitrypsin Deficiency

Autosomal codominant condition — the homozygous state produces liver disease (cirrhosis), pulmonary disease (emphysema), or both. α1-antitrypsin is a glycoprotein normally synthesised in hepatocyte rough ER, the most potent protease inhibitor (Pi); its gene is on chromosome 14 (same region encoding immunoglobulin light chains). Of 24 alphabetically labelled alleles, PiMM is the normal common phenotype; PiZZ homozygotes are the most frequent abnormal phenotype causing liver/lung disease. PiSS and Pi-null also cause disease (near-total serum deficiency). Intermediate PiMZ/PiSZ phenotypes predispose to hepatocellular carcinoma.

Patients may present with respiratory disease (emphysema), liver dysfunction, or both. At birth/in neonates: variable-severity cholestatic jaundice. In adolescence: may evolve to hepatitis or (usually well-compensated) cirrhosis.

Morphology: pulmonary changes = emphysema (covered elsewhere). Hepatic changes vary by presentation age — at birth/neonatally: neonatal hepatitis (acute or “pure” cholestasis); childhood/adolescence: micro- or macronodular cirrhosis, with the diagnostic feature being intracellular, acidophilic, PAS-positive globules in periportal hepatocytes (ultrastructurally, dilated rough ER).

Clinical Relevance

• All three conditions converge on the same downstream lesion (cirrhosis) via completely different accumulating substances (iron, copper, misfolded protein) — the organising principle is to anchor each condition to its defining triad/marker rather than its shared cirrhotic endpoint: haemochromatosis = bronze diabetes triad; Wilson’s = hepato-lenticular-corneal triad; α1-AT deficiency = liver+lung dual organ involvement from one gene.
• Wilson’s disease and Indian childhood cirrhosis share elevated hepatic copper as a diagnostic finding but differ sharply in age group, fatty-change presence, and regeneration capacity — this pairing is a recurring exam trap worth cross-referencing against the Cirrhosis of the Liver topic.
• The serum-copper-is-diagnostically-useless-but-ceruloplasmin-is-useful distinction in Wilson’s disease is a frequently tested, easily confused pair — ceruloplasmin (low) and hepatic/urinary copper (high) are the reliable tests, not serum copper itself.
• PiZZ homozygosity causing combined liver+lung disease from a single gene defect is worth remembering as the paradigm case of one protein deficiency producing genuinely two-organ pathology through two different mechanisms — accumulation of misfolded protein in the liver (cirrhosis) versus loss of protease inhibition in the lung (emphysema).

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Hereditary and Metabolic Liver Diseases

Overview

Three inherited/metabolic disorders converge on cirrhosis through toxic accumulation of a specific substance in the liver: haemochromatosis (iron), Wilson’s disease (copper), and α1-antitrypsin deficiency (a misfolded protein). Each has a distinctive systemic triad or pattern beyond the liver alone.

Pigment Cirrhosis in Haemochromatosis

An iron-storage disorder with excessive parenchymal iron accumulation causing tissue damage and functional insufficiency of liver, pancreas, heart, and pituitary. Classic triad: micronodular pigment cirrhosis + diabetes mellitus + skin pigmentation — hence “bronze diabetes.” Males predominate and present earlier (women have physiologic iron loss via menstruation, delaying effects).

Two forms:

1. Idiopathic (primary, genetic) — autosomal recessive; overexpression of the HFE gene (chromosome 6, near the HLA locus), which normally regulates intestinal iron absorption. Mutated HFE complexes with the transferrin receptor on intestinal crypt cells, causing excessive lifelong dietary iron absorption.
2. Secondary (acquired) — gross iron overload secondary to other disease: thalassaemia, sideroblastic anaemias, alcoholic cirrhosis, multiple transfusions.

Etiopathogenesis: normal body iron content 3–4 g, absorption matched to loss (~1 mg/day men, ~1.5 mg/day menstruating women). In haemochromatosis, absorption rises to ≥4 mg/day — reflected in elevated serum iron (normal ~125 mg/dl) and increased transferrin saturation (normal 30%). In primary disease, the genetic defect lies at the intestinal mucosal absorption level or the post-absorptive excretion level; excess iron deposits mainly in parenchymal cell cytoplasm (liver, pancreas, spleen, heart, endocrine glands); tissue injury results from iron-laden lysosomes and iron-driven lipid peroxidation of organelles. In secondary disease, causes include ineffective erythropoiesis, defective haemoglobin synthesis, multiple transfusions, and alcohol-enhanced iron absorption (e.g. African/Bantu siderosis from home-brewed beverages made in iron vessels) — RE system and liver iron storage rises, but the magnitude is generally insufficient to cause tissue damage.

Morphology: excess iron deposits as ferritin/haemosiderin — golden-yellow cytoplasmic pigment granules, haemosiderin positive with Prussian blue. Most affected: liver and pancreas, less so heart, endocrine glands, skin, synovium, testis. Liver: pigment in hepatocytes (less in Kupffer cells/bile duct epithelium), initially periportal with increasing portal fibrosis, eventually micronodular cirrhosis; chocolate-brown, nodular liver grossly. Pancreas: less intense pigmentation (acinar/islet cells), diffuse interstitial fibrosis and parenchymal atrophy → diabetes mellitus.

Clinical features: skin pigmentation, diabetes, hepatic/cardiac dysfunction, arthropathy, hypogonadism. Bronze pigmentation is the presenting feature in ~90%. Diagnosis: serum iron, transferrin saturation %, serum ferritin, chelatable iron stores (desferrioxamine), liver biopsy. Hepatocellular carcinoma is a late complication of haemochromatosis-induced cirrhosis.

Cirrhosis in Wilson’s Disease (Hepatolenticular Degeneration)

Autosomal recessive disorder of copper metabolism — toxic copper accumulation chiefly in liver, brain, eye. Classic triad:

1. Cirrhosis of the liver.
2. Bilateral basal ganglia degeneration.
3. Kayser-Fleischer rings — greenish-brown corneal periphery pigmentation.

Manifests predominantly in children/young adults (5–30 years). Initial manifestations relate to liver involvement (jaundice, hepatomegaly — hepatic form); later, progressive neuropsychiatric changes and Kayser-Fleischer rings appear.

Pathogenesis (vs normal copper metabolism): normally, dietary copper (exceeding requirement) is absorbed via stomach/duodenum, transported to liver, incorporated into α2-globulin to form ceruloplasmin, and excreted via bile — most plasma copper circulates as ceruloplasmin, with minute urinary excretion. In Wilson’s disease, absorption/hepatic transport are normal, but copper accumulates in the liver rather than being excreted — the defect is a mutation in the ATP7B gene (chromosome 13), the normal hepatic copper-excreting gene. Once hepatocyte storage capacity is exceeded, copper releases into circulation and deposits in extrahepatic tissues (brain, eyes, others) — renal copper deposition, notably, does not cause serious renal dysfunction.

Biochemical abnormalities: decreased serum ceruloplasmin (impaired apoceruloplasmin synthesis + defective lysosomal copper mobilisation); increased hepatic copper on biopsy; increased urinary copper excretion. Serum copper level itself is not diagnostically useful (varies low-normal-high by disease stage).

Morphology: liver shows fatty change, acute/chronic active hepatitis, submassive necrosis, and macronodular cirrhosis, in varying grades; Mallory bodies in some cases. Copper deposits in periportal hepatocytes as reddish cytoplasmic granules/colouration (rubeanic acid/rhodamine stains). Brain: toxic neuronal injury in basal ganglia. Cornea: copper deposits in Descemet’s membrane (Kayser-Fleischer rings). Kidney: fatty/hydropic change.

Cirrhosis in α1-Antitrypsin Deficiency

Autosomal codominant condition — the homozygous state produces liver disease (cirrhosis), pulmonary disease (emphysema), or both. α1-antitrypsin is a glycoprotein normally synthesised in hepatocyte rough ER, the most potent protease inhibitor (Pi); its gene is on chromosome 14 (same region encoding immunoglobulin light chains). Of 24 alphabetically labelled alleles, PiMM is the normal common phenotype; PiZZ homozygotes are the most frequent abnormal phenotype causing liver/lung disease. PiSS and Pi-null also cause disease (near-total serum deficiency). Intermediate PiMZ/PiSZ phenotypes predispose to hepatocellular carcinoma.

Patients may present with respiratory disease (emphysema), liver dysfunction, or both. At birth/in neonates: variable-severity cholestatic jaundice. In adolescence: may evolve to hepatitis or (usually well-compensated) cirrhosis.

Morphology: pulmonary changes = emphysema (covered elsewhere). Hepatic changes vary by presentation age — at birth/neonatally: neonatal hepatitis (acute or “pure” cholestasis); childhood/adolescence: micro- or macronodular cirrhosis, with the diagnostic feature being intracellular, acidophilic, PAS-positive globules in periportal hepatocytes (ultrastructurally, dilated rough ER).

Clinical Relevance

• All three conditions converge on the same downstream lesion (cirrhosis) via completely different accumulating substances (iron, copper, misfolded protein) — the organising principle is to anchor each condition to its defining triad/marker rather than its shared cirrhotic endpoint: haemochromatosis = bronze diabetes triad; Wilson’s = hepato-lenticular-corneal triad; α1-AT deficiency = liver+lung dual organ involvement from one gene.
• Wilson’s disease and Indian childhood cirrhosis share elevated hepatic copper as a diagnostic finding but differ sharply in age group, fatty-change presence, and regeneration capacity — this pairing is a recurring exam trap worth cross-referencing against the Cirrhosis of the Liver topic.
• The serum-copper-is-diagnostically-useless-but-ceruloplasmin-is-useful distinction in Wilson’s disease is a frequently tested, easily confused pair — ceruloplasmin (low) and hepatic/urinary copper (high) are the reliable tests, not serum copper itself.
• PiZZ homozygosity causing combined liver+lung disease from a single gene defect is worth remembering as the paradigm case of one protein deficiency producing genuinely two-organ pathology through two different mechanisms — accumulation of misfolded protein in the liver (cirrhosis) versus loss of protease inhibition in the lung (emphysema).

Hereditary and Metabolic Liver Diseases

• Three disease triads side by side: haemochromatosis (bronze diabetes), Wilson’s disease (hepato-lenticular-corneal), and α1-antitrypsin deficiency (liver+lung)
• Normal vs Wilson’s disease copper handling pathway, with the ATP7B defect point marked

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Hereditary and Metabolic Liver Diseases

• Three disease triads side by side: haemochromatosis (bronze diabetes), Wilson’s disease (hepato-lenticular-corneal), and α1-antitrypsin deficiency (liver+lung)
• Normal vs Wilson’s disease copper handling pathway, with the ATP7B defect point marked