Histopathological spectrum in cutaneous leishmaniasis: a study in Oman

Area of Science:

• Dermatology
• Parasitology
• Histopathology

Background:

• Cutaneous leishmaniasis exhibits diverse clinical and histological presentations.
• Histological examination is a recognized diagnostic tool for cutaneous leishmaniasis.
• Previous research has identified various histological reaction patterns.

Purpose of the Study:

• To investigate the histological features of cutaneous leishmaniasis in Oman.
• To correlate clinical manifestations with identified histological patterns.
• To characterize the spectrum of histological findings in Omani patients.

Main Methods:

• Retrospective analysis of 40 cutaneous leishmaniasis cases from Oman.
• Detailed examination of histological features.
• Correlation of histological findings with clinical data.

Main Results:

• Four primary histological patterns were identified: diffuse macrophage infiltration without necrosis, macrophage infiltration with necrosis, early reactive granuloma, and established epithelioid granuloma.
• Leishmania Donovani (LD) bodies were detected in 65% of cases.
• Epidermal changes were generally non-specific.
• Correlation between histological patterns and clinical features (duration, lesion type) was inconsistent.

Conclusions:

• Histological examination reveals distinct patterns in cutaneous leishmaniasis.
• While some correlations exist, histological patterns do not consistently align with clinical presentation or duration.
• Further research may elucidate more consistent diagnostic or prognostic indicators.