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Significance of nail changes in leprosy: a clinical review of 357 cases
Abstract:
Leprosy can cause many nail changes, which have been observed in up to 64% of infected patients. The manifestations of leprosy (clinical, bacteriologic, and histological) are profoundly affected by the patient's immunological status, which also determines the prognosis. Nail changes in leprosy can be caused by neuropathy and trauma, vascular impairment, infections, and miscellaneous changes. Often more than one factor will be important. Paradoxically, nail changes in tuberculoid and lepromatous patients are similar, despite wide differences in pathology. This may be because etiological factors common to both are implicated. Factors only associated with lepromatous disease are invasion of the bones of terminal phalanges by lepromatous granulomas and endarteritis occurring during type 2 lepra reactions. Otherwise, the only difference from tuberculoid leprosy is the time of onset and the symmetry of lesions. Lepromatous patients develop nail changes late in the course of disease. The presentation is usually bilaterally symmetrical. However, these changes are not specific to leprosy, and may be observed in other peripheral neuropathies.
Insights
Leprosy causes significant nail changes in up to 64% of patients due to neuropathy, vascular issues, and infections. These nail alterations, while common in leprosy, are not exclusive to the disease.
Area of Science:
- Dermatology
- Infectious Diseases
- Podiatry
Background:
- Leprosy, a chronic infectious disease, affects various tissues, including nails.
- Nail changes are observed in a substantial percentage of leprosy patients, influenced by disease type and host immunity.
- The pathogenesis of nail changes involves neuropathy, vascular compromise, trauma, and secondary infections.
Purpose of the Study:
- To detail the spectrum of nail changes associated with leprosy.
- To explore the etiological factors contributing to these nail manifestations.
- To differentiate leprosy-related nail changes from those seen in other conditions.
Main Methods:
- Review of clinical, bacteriologic, and histological findings in leprosy patients.
- Analysis of the correlation between immunological status and nail pathology.
- Comparison of nail changes across different leprosy classifications (e.g., tuberculoid vs. lepromatous).
Main Results:
- Nail changes occur in up to 64% of leprosy patients.
- Common causes include neuropathy, trauma, vascular impairment, and infections.
- Lepromatous leprosy presents unique features like phalangeal bone invasion and endarteritis, typically with late-onset, symmetrical changes.
Conclusions:
- Nail changes are a frequent, though non-specific, manifestation of leprosy.
- Immunological status significantly impacts disease presentation and prognosis.
- Differential diagnosis is crucial as similar nail changes can occur in other peripheral neuropathies.