What is Haemophagocytic Lymphohistiocytosis in Pediatric Pathology?

A life-threatening hyperinflammatory syndrome caused by uncontrolled activation and proliferation of cytotoxic T lymphocytes and macrophages, resulting in widespread tissue destruction and cytopenias.

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Pediatric Pathology Glossary

105 terms total — 1 showing — Last updated 15 Sep 2026

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Placental Site Nodule PSN

Advanced Technical IVT

A benign, hyalinised remnant of intermediate trophoblastic cells incidentally found in endometrial or cervical curettage specimens, representing a retained focus of implantation-site trophoblast.

15 Sep 2026

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Haemophagocytic Lymphohistiocytosis

Professional Technical IVT

A life-threatening hyperinflammatory syndrome caused by uncontrolled activation and proliferation of cytotoxic T lymphoc...

HLH haemophagocytic syndrome

Technical Term Full entry →

Glossary terms, with category, difficulty and definition
Term	Category	Difficulty	Definition
Haemophagocytic Lymphohistiocytosis IVT	Technical Term	Professional	A life-threatening hyperinflammatory syndrome caused by uncontrolled activation...

Glossary Stats

Total terms 105

IVT eligible 101

Verified 0

basic 3

intermediate 25

advanced 43

professional 34