Lymphocytic thrombophilic arteritis: an enigma.

Area of Science:

• Vascular Medicine
• Dermatopathology
• Rheumatology

Background:

• Livedo racemosa is a skin condition that can indicate underlying vasculitis.
• Lymphocytic thrombophilic arteritis (LTA) is a recently described vasculitic entity.
• LTA shares clinical and histological similarities with polyarteritis nodosa (PAN).

Purpose of the Study:

• To present a case of livedo racemosa attributed to lymphocytic thrombophilic arteritis (LTA).
• To discuss the differential diagnosis between LTA and polyarteritis nodosa (PAN).
• To highlight the diagnostic challenges and clinical significance of LTA.

Main Methods:

• Clinical presentation of a 55-year-old woman with a 5-year history of livedo racemosa.
• Histopathological examination of medium-sized arteries revealing vasculitis with a hyalinised fibrin ring.
• Laboratory investigations to exclude other systemic diseases.

Main Results:

• Histology confirmed vasculitis consistent with lymphocytic thrombophilic arteritis (LTA).
• No evidence of underlying systemic disease was found.
• The findings underscore LTA's resemblance to polyarteritis nodosa (PAN).

Conclusions:

• Lymphocytic thrombophilic arteritis (LTA) is a distinct vasculitic entity or a variant of PAN.
• Accurate diagnosis of LTA is crucial due to its mimicry of PAN.
• This case emphasizes the importance of considering LTA in patients with livedo racemosa and vasculitis.