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Patient Case: Cutaneous Cryptococcosis

Discussion

Chief Complaint: “I have these strange skin bumps that won’t heal.”

History of Present Illness:
A 45-year-old male from a rural village in Sub-Saharan Africa presents to a local clinic with multiple painless, nodular skin lesions on his face, neck, and upper arms. The lesions started as small, firm bumps a month ago and have gradually increased in size, some developing ulceration and crusting. He also reports occasional low-grade fever and fatigue but denies any itching or significant pain.

His medical history includes untreated HIV, which was diagnosed two years ago. He has not been on antiretroviral therapy (ART) due to limited healthcare access. He works as a farmer and has frequent exposure to soil and bird droppings.

Physical Examination:

  • Multiple dome-shaped, violaceous papules and nodules, some with central ulceration
  • No tenderness or warmth over lesions
  • Mild generalized lymphadenopathy
  • No oral thrush or meningismus

Diagnosis:
Given the patient’s history of untreated HIV and characteristic skin lesions, a clinical suspicion of cutaneous cryptococcosis is made. A skin biopsy with fungal culture and India ink staining of cerebrospinal fluid (CSF) is ordered to rule out disseminated Cryptococcus neoformans infection, particularly cryptococcal meningitis.

Management Plan:

  • Systemic antifungal therapy: Amphotericin B and fluconazole
  • HIV management: Initiation of ART after stabilizing cryptococcal infection
  • Patient education:
    • Cutaneous cryptococcosis often indicates systemic infection, requiring urgent treatment
    • Regular follow-up for monitoring response to therapy and managing HIV-related complications

The patient is referred to a regional hospital for further care, including CSF evaluation, as cryptococcal infections often involve the central nervous system in immunocompromised individuals

Questions
1. What is the most likely causative organism of the patient’s skin lesions?

a) Cryptococcus neoformans
b) Trichophyton rubrum
c) Candida albicans
d) Aspergillus fumigatus

2. Which underlying condition most likely predisposed the patient to cutaneous cryptococcosis?

a) Uncontrolled diabetes
b) Untreated HIV infection
c) Chronic kidney disease
d) Tuberculosis

3. What is the most important next step in confirming the diagnosis?

a) Skin biopsy with fungal culture
b) Complete blood count (CBC)
c) Allergy skin testing
d) Chest X-ray

4. Why is it crucial to evaluate the patient for cryptococcal meningitis?

a) Cutaneous cryptococcosis always progresses to meningitis
b) Cryptococcal infections typically start in the lungs and can disseminate to the central nervous system
c) Meningitis is always asymptomatic in cryptococcal infections
d) Skin lesions indicate an isolated infection without systemic involvement

Reveal answers

Answers

  1. (a) Cryptococcus neoformans – This fungus is the primary cause of cutaneous cryptococcosis, often occurring in immunocompromised individuals, particularly those with HIV/AIDS.
  2. (b) Untreated HIV infection – The patient’s history of untreated HIV significantly increases susceptibility to opportunistic infections like cryptococcosis, which can present with skin involvement as a sign of systemic disease.
  3. (a) Skin biopsy with fungal culture – A skin biopsy can confirm the presence of Cryptococcus neoformans, but further testing (such as CSF analysis) is needed to check for systemic dissemination.
  4. (b) Cryptococcal infections typically start in the lungs and can disseminate to the central nervous systemCryptococcus neoformans is an opportunistic pathogen that often affects the lungs first before spreading to the CNS, making cryptococcal meningitis a major concern in immunocompromised patients. CSF analysis is essential to rule out life-threatening involvement.

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