Treatment of Typhlitis Complicated by Perforation and Microabscess

Immediate Surgical Indications

For typhlitis with perforation and microabscess, emergency surgical intervention is mandatory, as these complications represent absolute indications for surgery despite the high operative mortality in neutropenic patients 1, 2
Perforation is an absolute indication for surgery in typhlitis, overriding the general preference for conservative management 1, 2, 3
The presence of microabscess formation alongside perforation represents a surgical emergency requiring source control 1

Damage control surgery should be adopted in severely sick patients with physiological derangement, which is typical in perforated typhlitis 4
Resection of necrotic bowel with stoma creation (Hartmann-type procedure preferred in critically ill patients) is a surgical option 5

The mortality for emergency surgery in neutropenic patients is up to 81% for patients on active chemotherapy, and 57% for those who had chemotherapy within 30 days 1
Perforation without surgical intervention is universally fatal 1, 2, 3
Bowel wall thickening >10mm on CT carries a 60% mortality risk, and the presence of perforation with microabscess indicates advanced disease requiring source control 1, 4

Immediate broad-spectrum antibiotics covering Gram-negative bacteria and anaerobes must be initiated before and continued after surgery 1, 4, 6
First-line regimen per IDSA guidelines for febrile neutropenia includes an anti-pseudomonal β-lactam agent (piperacillin-tazobactam 4g/0.5g q6h) or a carbapenem (meropenem 1g q6h by extended infusion) 1, 5
The duration of antibiotics is 4 days if adequate source control is achieved in immunocompetent patients, and up to 7 days in immunocompromised or critically ill patients 5, 7, 8

Bowel rest is mandatory 1, 6
Intravenous fluids and total parenteral nutrition are recommended 3
Normalization of neutrophil counts through granulocyte colony-stimulating factors correlates directly with resolution 1
Percutaneous drainage of accessible abscesses may be considered as an adjunct to surgery if collections are well-defined and accessible 5, 9

Do not delay surgery waiting for hematologic recovery when perforation is present, as this is universally fatal 1, 3
Clinical signs may be minimal or absent despite catastrophic intra-abdominal pathology due to neutropenia, so maintain high suspicion and rely on imaging 4
Mortality reaches 29.5% even with appropriate treatment when radiologic signs of typhlitis are present, and approaches 60% with bowel wall >10mm 1, 4