Bacillary angiomatosis is an infective complication in those with the acquired immunodeficiency syndrome (AIDS) 3. Amongst other widespread multi-organ manifestations, the infection causes skin lesions which can be similar to those of Kaposi sarcoma.
Characterised by a non-neoplastic vascular proliferation related to infection.
Typical causative organisms include 2:
- Bartonella henselae: causes cat-scratch disease in non-immunocompromised patients
- Bartonella quintana
Lesions typically demonstrate characteristic pleomorphic bacillary organisms following the Warthin-Starry stain.
May be better outlined according to location rather than modality:
- lung nodules
- mediastinal adenopathy
- peripheral adenopathy
- pleural effusions
- abdominal adenopathy
- soft-tissue masses
- low-attenuating lesions in the liver +/- spleen 5,6
- lesions often show enhancement with contrast
- osteomyelitis causing osteolytic bony lesions 4,7
History and etymology
It was originally described in 1983 by Stoler et al 1.
Treatment and prognosis
Often treated with erythromycin.
- Kaposi sarcoma: can have similar cutaneous manifestations, but no osteolytic bone lesions
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