Related Experiment Video
Updated: Jan 1, 2026
Modeling Osteosarcoma Using Li-Fraumeni Syndrome Patient-derived Induced Pluripotent Stem Cells
Published on: June 13, 2018
Malignant Infantile osteopetrosis
Insights
Malignant Infantile Osteopetrosis (MIOP) is a severe genetic disorder. Early diagnosis and hematopoietic stem cell transplant are crucial for this lethal condition.
Area of Science:
- Genetics
- Pediatrics
- Hematology
Background:
- Malignant Infantile Osteopetrosis (MIOP) is a rare, severe genetic disorder characterized by abnormal osteoclast function.
- It presents in infancy with significant morbidity and mortality.
Observation:
- A 10-month-old male infant diagnosed with MIOP presented with thrombocytopenia and visceromegaly.
- Clinical features included severe hepatosplenomegaly, anemia, visual and hearing impairment, and recurrent infections.
- Genetic analysis confirmed heterozygous mutations in the TCIRG1 gene.
Findings:
- Hematopoietic stem cell transplantation was performed but did not result in hematological recovery.
- The patient's condition was complicated by occlusive venous disease, leading to mortality.
Implications:
- MIOP necessitates a high index of suspicion in infants with hepatosplenomegaly and bone marrow failure.
- Early diagnosis and timely hematopoietic stem cell transplantation offer the only potentially curative options for this lethal disease.
Introduction:
Malignant Infantile Osteopetrosis (MIOP) is a rare and severe genetic disorder due to abnormal osteoclast activity.
Objective:
To report an infant who presented Malignant Infantile Osteopetrosis, reviewing the most relevant diagnostic and therapeutic aspects.
Clinical Case:
A ten- month-old male infant with diagnosis of MIOP confirmed after presenting thrombocytopenia and visceromegaly. He was the first child of non-consanguineous parents, and among the findings, he presented severe hepatosplenomegaly, thrombocytopenia, and anemia; visual and hearing impair ment, and repeated infections. The diagnosis was confirmed by genetic study, which identified two heterozygous mutations in the TCIRG1 gene. Hematopoietic stem cells were transplanted without hematological recovery. The patient died due to occlusive venous disease.
Discussion:
MIOP is a rare, severe, and early-onset disease, with a high rate of suspicion necessary in the presence of hepa- tosplenomegaly and bone marrow failure. Early diagnosis and hematopoietic stem cells transplanta tion are the only potentially therapeutic interventions of this lethal entity.
Related Concept Videos
01:20The Retinoblastoma Gene
The first-ever tumor suppressor gene called Rb was identified in retinoblastoma - a rare eye tumor in children. In inherited forms of the disease, a child inherits one defective copy of the Rb gene, which predisposes them to retinoblastoma. However,...
01:29Bone Disorders
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...
01:20Inborn Errors of Metabolism
01:31Osteoclasts in Bone Remodeling