Cerebral phaeohyphomycosis: a rare cause of brain abscess

Fungal thalamic abscess caused by Rhinocladiella mackenziei in an immunocompetent patient

Cerebral phaeohyphomycosis (CP) stands as an exceedingly uncommon yet severe type of fungal infection affecting the central nervous system, attributable to dematiaceous fungi. Despite the patient's immune status, CP is associated with grave prognosis. In the present study, authors describe the first case of left thalamic fungal abscess due to Rhinocladiella mackenziei in an immunocompetent 39-year-old male patient in Jaipur, Rajasthan. Early diagnosis by direct microscopy of aspirated pus and extensive management with surgical excision and prolonged antifungal coverage showed favourable outcome. The present case is one of the few cases documented globally who has survived.

Post covid cerebral phaeohyphomycosis by Rhinocladiella mackenziei: An unusual association

Cerebral phaeohyphomycosis (CP) is a rare but a highly morbid fungal infection of the central nervous system caused by the fungi belonging to the order Chaetothyriales, which includes Cladophialophora bantiana, Exophiala dermatitidis, Rhinocladiella mackenziei (RM) etc. This disease is associated with poor clinical outcomes, with reported mortality of over 80%. We present the case of a 65-year gentleman who developed CP secondary to RM infection following COVID-19 and the associated challenges in his medical and surgical management.

Gram stain to the rescue: a case report of cerebral phaeohyphomycosis by Cladophialophora bantiana in an immunocompetent 24-year-old

BACKGROUND

Fungal brain abscesses in immunocompetent patients are exceedingly rare. Cladophialophora bantiana is the most common cause of cerebral phaeohyphomycosis, a dematiaceous mold. Radiological presentation can mimic other disease states, with diagnosis through surgical aspiration and growth of melanized fungi in culture. Exposure is often unknown, with delayed presentation and diagnosis.

CASE PRESENTATION

We present a case of cerebral phaeohyphomycosis in a 24-year-old with no underlying conditions or risk factors for disease. He developed upper respiratory symptoms, fevers, and headaches over the course of 2 months. On admission, he underwent brain MRI which demonstrated three parietotemporal rim-enhancing lesions. Stereotactic aspiration revealed a dematiaceous mold on staining and the patient was treated with liposomal amphotericin B, 5-flucytosine, and posaconazole prior to culture confirmation. He ultimately required surgical excision of the brain abscesses and prolonged course of antifungal therapy, with clinical improvement.

CONCLUSIONS

Culture remains the gold standard for diagnosis of infection. Distinct microbiologic findings can aid in identification and guide antimicrobial therapy. While little guidance exists on treatment, patients have had favorable outcomes with surgery and combination antifungal therapy. In improving awareness, clinicians may accurately diagnose disease and initiate appropriate therapy in a more timely manner.

Invasive cerebral phaeohyphomycosis in a Chinese boy with CARD9 deficiency and showing unique radiological features, managed with surgical excision and antifungal treatment

We report this rare case of cerebral phaeohyphomycosis in a previously healthy Chinese boy, who was found to have caspase recruitment domain family member 9 (CARD9) deficiency. Initial radiological features suggested a neoplastic cerebral lesion, while histopathological examination supplemented by internal transcribed sequencing (ITS) of cerebral tissue confirmed the diagnosis of phaeohyphomycosis. He was treated with intravenous (IV) liposomal amphotericin B and voriconazole, guided by plasma and cerebrospinal fluid (CSF) level monitoring at drug initiation. At the 1 year follow-up, the patient demonstrated near complete neurological and radiological recovery.

Cerebral phaeohyphomycosis due to Cladophialophora bantiana in an immunocompetent individual: A case report and brief review of literature

Background and Purpose

Fungal infections of the central nervous system (CNS) are life-threatening conditions that are frequently misdiagnosed with bacterial and viral CNS infections. Cerebral phaeohyphomycosis is a cerebral infection caused by dematiaceous fungi, especially Cladophialophora bantiana. Very few cases of fungal CNS infection have been reported across the world. High clinical suspicion should be cast for the patients with brain abscess that do not respond to conventional antibiotic therapy.

Case report

We report a case of a 21-year-old male presenting with headache, seizures and weakness in the limbs. Radiological examination revealed multiple brain abscesses. After surgical excision and laboratory evaluation, it was found to be caused by C. bantiana. The patient's outcome was good with surgical excision and voriconazole therapy.

Conclusion

Brain abscess caused by C. bantiana is on rise, especially in immunocompromised groups. Thus, high clinical suspicion, accurate diagnosis and management are the fundamentals for good prognosis.

Solitary Intracerebral Phaeoid Fungal Granuloma: A Case Report

Fungal granuloma in the brain parenchyma caused by pheohyphomycosis is extremely rare. Antifungal drugs are not very effective. The present report is a case of solitary pheohyphomycosis granuloma, which underwent surgical excision followed by antifungal drug treatment with excellent result.

Cerebral Phaeohyphomycosis with Onychomycosis: Case Report and Review of Literature

The term phaeohyphomycosis (PHM) means dark-pigmented fungal hyphae. Cerebral PHM (CPHM) with onychomycosis is extremely rare; very few have been reported so far. The authors report a case of CPHM with onychomycosis in a 37-year-old male from a rural background in Haryana, India, with involvement of the left frontal lobe. The mass was resected and biopsy was sent for histopathological examination. He was given antifungal drugs in the postoperative period. The patient responded very well to the treatment, and there were no signs of recurrence at the 6-month follow-up visit. The clinical features, imaging and histopathological investigations, and management of this rare entity are discussed, and the available literature is also reviewed.