Familial hemophagocytic lymphohistiocytosis

S Raka1, P Nayar, R Godbole

  • 1Department of Pathology, King Edward Memorial Hospital, Pune, India.

Insights

A 45-day-old infant was diagnosed with hemophagocytic lymphohistiocytosis (HLH), a rare and severe condition. The familial origin was suspected due to the death of two siblings.

Area of Science:

  • Pediatrics
  • Hematology
  • Immunology

Background:

  • Hepatosplenomegaly and fever are critical indicators in infant diagnostics.
  • Bicytopenia and hemophagocytosis in bone marrow aspirates suggest severe hematologic disorders.

Purpose of the Study:

  • To present a case of infant hemophagocytic lymphohistiocytosis (HLH).
  • To highlight the diagnostic challenges and familial implications of HLH.

Main Methods:

  • Clinical presentation analysis: hepatosplenomegaly, fever.
  • Laboratory investigations: hemogram, bone marrow aspirate.
  • Family history review: sibling mortality.

Main Results:

  • The infant presented with prolonged fever and enlarged liver and spleen.
  • Blood tests indicated bicytopenia, and bone marrow examination revealed hemophagocytosis.
  • A history of two deceased siblings strongly suggested a familial form of HLH.

Conclusions:

  • The case underscores the importance of considering familial hemophagocytic lymphohistiocytosis (HLH) in infants with suggestive clinical and laboratory findings.
  • Early recognition and diagnosis are crucial for potential management of this life-threatening condition.

Related Concept Videos

Lysosomal Hydrolases01:22

Lysosomal Hydrolases

Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
Huntington Disease l: Introduction01:21

Huntington Disease l: Introduction

Huntington disease or HD is a progressive, fatal neurodegenerative disorder inherited in an autosomal dominant pattern.PathophysiologyIt is caused by expansion of the CAG trinucleotide repeat in the HTT gene on chromosome 4 (4p16.3), producing an abnormal huntingtin protein with an expanded polyglutamine tract. This misfolded protein disrupts cellular function, leading to neuronal death. Normal alleles have ≤26 repeats, 27–35 are intermediate (risk of expansion), 36–39 show reduced penetrance,...
Cardiomyopathy III: Hypertrophic Cardiomyopathy01:29

Cardiomyopathy III: Hypertrophic Cardiomyopathy

Hypertrophic cardiomyopathy, or HCM, is an autosomal dominant genetic disorder characterized by asymmetric left ventricular hypertrophy without ventricular dilation. It is more common in men and is typically diagnosed in young, athletic adults.EtiologyHCM is primarily genetic and is caused by mutations in genes encoding sarcomeric proteins. Researchers have identified over 1400 mutations across at least 11 different genes. Among these, the most frequently occurring mutations are found in the...
Lethal Alleles02:41

Lethal Alleles

Agouti: A Lethal Allele
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Immunodeficiency Diseases01:25

Immunodeficiency Diseases

Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency disorders...
Hepatitis01:25

Hepatitis

Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver. The...