40 yr old - kiranraja

[ArchivalUser]

A 40-year-old woman has had a worsening headache for the past week, along with a fever and increasing obtundation. On physical examination her temperature is 38.2 C. A head CT scan reveals a solitary 3 cm diameter lesion with ring enhancement located in the right parietal lobe. A stereotactic biopsy is performed and a frozen section shows granulation tissue with adjacent collagenization, gliosis, and edema. Which of the following is the most likely diagnosis

A Chronic brain abscess

B Aspergillosis

C Progressive multifocal leukocencephalopathy

D Toxoplasmosis

E Rabies virus infection

[ArchivalUser]

DDDDDDDDDDD

[ArchivalUser]

sorry its solitary so i change my ans to A.chronic brain abcess

[ArchivalUser]

ddd

[ArchivalUser]

B?

[ArchivalUser]

correct answer is A.
Granulation tissue with fibrosis is a typical reaction to a cerebral abscess. Collagen deposition around a ring enhancing lesion is typical for an abscess that organizes. A common source for such a brain abscess is a lung infection.

D. Toxoplasmosis can produce ring-enhancing lesions, but they do not have granulation tissue. Toxoplasmosis is most likely to be seen in immunocompromised patients.