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Observations on hair shaft morphology in mucopolysaccharidoses
Abstract:
Scalp hair samples were obtained from 11 children with mucopolysaccharidosis (MPS, types I, II and III) in order to study the micromorphological structure of the hair shafts. To evaluate the morphological variation longitudinal hair preparations and cross-sections were investigated by light microscopy and additionally scanning electron microscopy was employed to demonstrate the surface structure. It is shown that the mean hair shaft diameter in MPS-patients, separated into two age groups, is not significantly different from the mean value in normal children of the same age, whereas the wider range of diameters and, in connection with it, the increased medulla content seems to be a characteristic feature of MPS. The most striking deviations were observed in the cross-sections, particularly in MPS III/A patients: varying polygonal shapes and an abnormal pigment distribution. According to these cross-sections the hair surface exhibited severe deformities in the scanning electron microscope, i.e. distortions of hair, irregular nodes and longitudinal grooves. In MPS I and II similar abnormalities were found.
Insights
Children with mucopolysaccharidosis (MPS) show distinct hair shaft abnormalities, including wider diameter ranges and increased medulla content. These micromorphological changes, like surface deformities, are characteristic of MPS hair.
Area of Science:
- Biomedical Science
- Genetics
- Dermatology
Background:
- Mucopolysaccharidoses (MPS) are rare genetic disorders.
- MPS affects cellular structure and function.
- Hair shaft micromorphology in MPS is not well understood.
Purpose of the Study:
- To investigate the micromorphological structure of hair shafts in children with MPS.
- To identify characteristic hair shaft abnormalities in different MPS types.
Main Methods:
- Analysis of scalp hair samples from 11 children with MPS (types I, II, III).
- Light microscopy of longitudinal and cross-sectioned hair preparations.
- Scanning electron microscopy (SEM) for surface structure evaluation.
Main Results:
- No significant difference in mean hair shaft diameter compared to controls.
- Wider range of hair shaft diameters and increased medulla content observed in MPS patients.
- Significant cross-sectional deformities, abnormal pigment distribution, and surface irregularities (nodes, grooves) noted, especially in MPS III/A.
Conclusions:
- Hair shaft micromorphology reveals characteristic changes in MPS patients.
- These findings suggest hair shaft analysis could be a potential diagnostic indicator for MPS.
- Abnormalities are present across MPS types I, II, and III, with notable severity in MPS III/A.