Question

A child presents with cholestasis and lymphedema of the feet. What is the most likely diagnosis?

• A. Aagenaes syndrome
• B. Biliary atresia
• C. Choledochal cyst
• D. Viral hepatitis

Hint:

Classic Syndromic Associations with Cholestasis:
$\bullet$ Cholestasis + Lower limb lymphedema = Aagenaes syndrome (LCS1)
$\bullet$ Cholestasis + Butterfly vertebrae + Peripheral pulmonary stenosis = Alagille syndrome
$\bullet$ Cholestasis + Normal GGT = PFIC-1 PFIC-2 Inborn errors of bile acid synthesis

Answer 1

The Correct Option is A

Concept:
Aagenaes syndrome, also termed Lymphedema-Cholestasis Syndrome (LCS1), is an extremely rare autosomal recessive disorder characterized by the unique co-occurrence of neonatal intrahepatic cholestasis and generalized lymphatic vessel hypoplasia.
Explanation:
• Aagenaes syndrome is caused by homozygous mutations in the LCS1 gene locus on chromosome 15q.

• It is characterized by abnormal development and generalized hypoplasia of lymphatic vessels throughout the body, including both peripheral tissues and the liver.

• Clinically, affected patients present in the neonatal period with severe conjugated hyperbilirubinemia, pruritus, pale stools, and jaundice mimicking other causes of neonatal cholestasis.

• The cholestasis typically exhibits an episodic or fluctuating course that tends to improve spontaneously during childhood, only to recur later in life (e.g., during intercurrent illnesses or pregnancy).

• The pathognomonic hallmark is the development of chronic, progressive lymphedema of the lower extremities (feet and legs), which typically becomes clinically prominent around school age or early childhood.

• Biliary atresia, choledochal cysts, and viral hepatitis present with neonatal cholestasis, but none of these conditions are associated with congenital peripheral lymphedema.
Final Answer:
The distinctive association of idiopathic neonatal cholestasis with lower-limb lymphedema is the hallmark of Aagenaes syndrome.