Pediatric Pathology Glossary
105 terms total — 24 showing — Last updated 15 Sep 2026
Placental Site Nodule PSN
A benign, hyalinised remnant of intermediate trophoblastic cells incidentally found in endometrial or cervical curettage specimens, representing a retained focus of implantation-site trophoblast.
Diffuse Intrinsic Pontine Glioma
A highly aggressive, diffusely infiltrative brainstem glioma arising in the pons of children, characterised by the H3 K2...
DSRCT
Abbreviation for desmoplastic small round cell tumour, a rare peritoneal sarcoma of adolescents characterised by the EWS...
duodenal atresia
Congenital obstruction of the duodenum due to failure of recanalization during fetal development.
embryonal tumour with multilayered rosettes
A highly aggressive paediatric central nervous system embryonal tumour defined by amplification of the C19MC microRNA cl...
Ependymoma
A glial tumour arising from ependymal cells lining the ventricular system and central canal of the spinal cord, the most...
ETMR
Abbreviation for embryonal tumour with multilayered rosettes, an aggressive paediatric CNS tumour defined by C19MC ampli...
Extralobar Sequestration
A discrete mass of non-functioning lung tissue with its own pleural covering and systemic arterial supply, located outsi...
Favourable Histology
A formal INPC designation applied to neuroblastic tumours whose histopathological features—including tumour category, de...
Fetal Autopsy
A post-mortem examination performed on a stillborn or pregnancy-loss specimen to determine cause of death, structural an...
Fetal Rhabdomyoma
A benign mesenchymal tumour of skeletal muscle differentiation occurring predominantly in the head and neck region of in...
Fibromatosis Colli
A benign fibrous proliferation within the sternocleidomastoid muscle of neonates, presenting as a neck mass and typicall...
Fibrous Hamartoma of Infancy
A benign fibroblastic soft-tissue lesion of early childhood composed of three characteristic tissue components: fibrous...
frozen section
An intraoperative histological technique in which tissue is rapidly frozen and sectioned to provide near-immediate patho...
Ganglioneuroblastoma
An intermediate-grade peripheral neuroblastic tumour containing both immature neuroblasts and mature ganglion cells, cla...
gastroschisis
A congenital abdominal wall defect where intestines protrude through an opening beside the umbilical cord.
germinal matrix hemorrhage
Bleeding in the germinal matrix region of premature infant brains, a major cause of neurological morbidity.
gestational age
The age of a pregnancy or fetus measured in weeks from the first day of the mother's last menstrual period (LMP), used a...
Haemophagocytic Lymphohistiocytosis
A life-threatening hyperinflammatory syndrome caused by uncontrolled activation and proliferation of cytotoxic T lymphoc...
Hepatic Infantile Haemangioma
A benign vascular tumour of the infant liver characterised by lobular proliferation of GLUT1-positive endothelial cells,...
Hepatic Mesenchymal Hamartoma
A benign cystic hepatic tumour of early childhood composed of loosely arranged mesenchymal stroma, bile ducts, and hepat...
hepatoblastoma
Most common primary liver malignancy in children, arising from primitive hepatic cells.
Hirschsprung disease
A congenital disorder characterised by the absence of ganglion cells in the distal bowel wall (aganglionosis), causing f...
HLH
Acronym for Haemophagocytic Lymphohistiocytosis, a severe hyperinflammatory syndrome characterised by uncontrolled macro...
HLHS
Hypoplastic left heart syndrome - severe congenital heart defect with underdeveloped left-sided cardiac structures.