The patient confirmed having been scratched by a cat and the serology for Bartonella henselae was IgM+/IgG-.
[ncbi.nlm.nih.gov]
[…] cleft cyst, thyroglossal duct cyst, lymphangioma/hemangioma, dermoid, laryngocele, pharyngeal diverticulum, thymic cyst); infectious complications (eg, bacterial, viral, cat-scratch
[emedicine.com]
The biopsy revealed a necrotising and abscessed granulomatous lymphadenitis, suggestive of cat scratch disease.
[ncbi.nlm.nih.gov]