Ocular and cerebral involvement in familial lymphohistiocytosis

Insights

Familial lymphohistiocytosis caused a 5-month-old infant girl's death. Autopsy revealed widespread central nervous system and ocular infiltration by inflammatory cells, including lymphocytes and histiocytes.

Area of Science:

  • Pediatric Pathology
  • Neuro-oncology
  • Ophthalmology

Background:

  • Familial lymphohistiocytosis (FLH) is a rare, life-threatening hyperinflammatory condition.
  • Early diagnosis and treatment are crucial for FLH outcomes.

Observation:

  • A 5-month-old infant girl presented with fatal familial lymphohistiocytosis.
  • Post-mortem examination revealed extensive central nervous system (CNS) involvement.
  • Ocular tissues also demonstrated significant cellular infiltration.

Findings:

  • Widespread perivascular infiltration in the cerebral pia, arachnoid, white matter, deep gray matter, cerebellum, and brain stem.
  • Infiltrating cells included lymphocytes, histiocytes, and macrophages exhibiting erythro- and lymphophagocytosis.
  • Ocular findings included anterior uveal tract infiltration, inner retina involvement, and optic nerve infiltration.

Implications:

  • This case highlights the severe CNS and ocular pathology associated with familial lymphohistiocytosis in infants.
  • Understanding the distribution of cellular infiltration is vital for diagnosing and managing FLH.
  • Further research into FLH pathogenesis may reveal targeted therapeutic strategies.

Related Concept Videos

Genetic Lingo01:11

Genetic Lingo

Overview
Lymphoid Cells and Tissues01:18

Lymphoid Cells and Tissues

Lymphoid cells and tissues are integral to the immune system, which is crucial in maintaining our body's defense against harmful pathogens. They form the building blocks of lymphoid organs, which include the spleen, thymus, and lymph nodes.
Lymphoid cells consist of various types of immune system cells. These include B and T lymphocytes, which are responsible for producing antibodies and killing infected cells, respectively. Dendritic cells act as messengers between the innate and adaptive...
Primary Lymphoid Organs01:16

Primary Lymphoid Organs

Primary lymphoid organs are pivotal in the formation, development, and maturation of lymphocytes, the white blood cells that serve as the backbone of our immune system. This crucial function underscores their fundamental role in maintaining our overall health and immunity. The two primary lymphoid organs of prime importance are the red bone marrow and the thymus.
The red bone marrow is a soft, spongy tissue nestled in the interior of long bones such as the humerus and femur. It is the site...
Secondary Lymphoid Organs01:15

Secondary Lymphoid Organs

Secondary organs, including lymph nodes, the spleen, and mucosa-associated lymphoid tissue (MALT), work harmoniously to protect us from disease and infection.
The spleen is a vital organ in the lymphatic system, nestled in the upper left side of the abdomen. It is composed of two primary regions: the red pulp and the white pulp, each having distinct functions. The red pulp performs a significant role in blood filtration. It efficiently purges the blood of old or damaged red blood cells and...
Encephalitis ll: Pathophysiology01:26

Encephalitis ll: Pathophysiology

Encephalitis is inflammation of the brain parenchyma caused by direct viral invasion or immune-mediated mechanisms triggered by infections or tumors. Both processes lead to neuronal injury, disrupted neurotransmission, and diverse neurological symptoms, often with overlapping clinical and pathological features.Autoimmune EncephalitisIn autoimmune encephalitis, antibodies target neuronal antigens on cell surfaces, synapses, or within neurons. A key example is anti-NMDAR encephalitis, which can...
Cytotoxic Edema: Pathophysiology01:21

Cytotoxic Edema: Pathophysiology

Cytotoxic edema is a form of cerebral edema characterized by intracellular swelling of neurons, astrocytes, and other glial cells. It develops when the mechanisms responsible for maintaining ionic gradients across the cell membrane become impaired. Under normal physiological conditions, the sodium–potassium ATPase actively transports sodium ions out of the cell and potassium ions into the cell, preserving osmotic balance and enabling electrical signaling. This pump requires a continuous supply...