Diagnosing Granulomatous Lesions in Immunocompromised Patients
The question describes a patient who is immuno-compromised and presents with symptoms suggestive of disseminated disease, specifically "local gamma like tumors" and granulomatous lesions affecting multiple sites including the lungs, bones, and brain/meninges. The key is to identify the condition most likely to cause such widespread granulomatous inflammation in an immunocompromised host.
Evaluating Differential Diagnoses
- Tuberculosis: While TB can cause granulomas and disseminate in immunocompromised individuals, the term "gamma like tumors" is not typical.
- Leprosy: Primarily affects skin and peripheral nerves; less likely to cause disseminated granulomatous lesions in lungs, bones, and brain simultaneously.
- Sarcoidosis: Characterized by non-caseating granulomas, but typically occurs in immunocompetent hosts and doesn't usually present as "tumors."
- Cryptococcosis: A fungal infection common in immunocompromised patients (e.g., HIV). It frequently causes disseminated disease, including lung and CNS infections (meningitis, cryptococcomas in the brain, which can appear tumor-like). Granulomatous inflammation is characteristic.
Identifying the Most Likely Diagnosis
Given the patient is immuno-compromised and presents with disseminated granulomatous lesions, particularly involving the central nervous system (brain and meninges), Cryptococcosis is the most probable diagnosis. Opportunistic fungal infections like Cryptococcosis thrive in immunocompromised states and can manifest with varied presentations, including lesions that may be described as tumor-like.
The presence of lesions in the lungs, bones, and CNS, combined with immune deficiency, strongly points towards an opportunistic pathogen. Cryptococcus neoformans is a well-known cause of such disseminated disease.
Important Questions from Fungal Infections
- Which of the following opportunistic systemic mycoses is characterized by rapid development of severe tissue necrosis and emerged as specific complication associated with COVID-19 infection in India?
- Which of the following fungal infections is caused by dermal inoculation of the fungal agent, usually from a thorn?
Consider the following statements with regard to coccidioidomycosis:
1. It is a primary systemic mycosis caused by dimorphic fungi Cocci- dioides immitis and Coccidioides posadasii.
2. Primary pulmonary coccidioido- mycosis presents with cough, fever, chest pain and arthritis.
3. Progressive pulmonary coccidioido- mycosis presents with constitu- tional symptoms like fever, weight loss, anorexia and features of lobar pneumonia.
4. Coccidioides meningitis is a mild disease, not warranting any treatment.
Which of the statements given above are correct?
- A patient receiving chemotherapy develops neutropenia. He presents with fever, cough, expectoration, chest pain and hemoptysis. His CT scan of chest reveals nodular infiltrates with halo sign and crescent sign. The most useful drug for treating him is
- Consider the following statements with regard to Amphotericin B :
1. It is a narrow spectrum antifungal agent.
2. It can cause nephrotoxicity.
3. It lacks an oral preparation.
4. Its lipid formulations are less toxic.
Select the correct answer using the code given below:
