Cutaneous infections due to nontuberculous mycobacteria: histopathological review of 28 cases. Comparative study between lesions observed in immunosuppressed patients and normal hosts
| Autor: | Antoni Castells, Vicente García-Patos, Agustí Alomar, Dolors Sitjas, Ramon M. Pujol, Nuria Martín-Casabona, Pere Coll, R. Bartralot |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Adult
Male Pathology medicine.medical_specialty Panniculitis Histology Adolescent Mycobacterium Infections Nontuberculous Mycobacterium chelonae Mycobacterium gordonae Dermatology Mycobacterium abscessus Pathology and Forensic Medicine Immunocompromised Host Humans Medicine Mycobacterium marinum Aged Retrospective Studies Mycobacterium kansasii Acquired Immunodeficiency Syndrome Granuloma biology medicine.diagnostic_test business.industry Nontuberculous Mycobacteria Skin Diseases Bacterial Middle Aged bacterial infections and mycoses biology.organism_classification Skin biopsy Female Mycobacterium simiae Epidermis business Immunosuppressive Agents Mycobacterium terrae |
| Zdroj: | Journal of Cutaneous Pathology. 27:124-129 |
| ISSN: | 1600-0560 0303-6987 |
| Popis: | To evaluate the histopathological features observed in patients with cutaneous infections due to nontuberculous mycobacteria (NTM) and to compare the histopathological patterns observed in immunosuppressed patients and normal hosts. Twenty-eight biopsy specimens corresponding to 27 patients with cutaneous infections due to NTM were reviewed. Eighteen biopsies corresponded to normal hosts (14 Mycobacterium marinum, 2 Mycobacterium chelonae, 1 Mycobacterium terrae and 1 Mycobacterium gordonae) and 10 biopsy specimens were obtained from 9 immunosuppressed patients (3 Mycobacterium chelonae, one of which had two biopsies, 1 Mycobacterium abscessus, 2 Mycobacterium kansasii, 1 Mycobacterium marinum, 1 Mycobacterium avium complex and 1 Mycobacterium simiae). A panel of histopathological features was evaluated by two independent observers in each biopsy specimen. Epidermal changes (acanthosis, pseudoepitheliomatous hyperplasia, exocytosis) were mainly observed in M. marinum infections. In immunosuppressed patients the infiltrate tended to be deeper, involving the subcutaneous tissue (100%) with a more diffuse distribution and constant abscess formation. A marked granulomatous inflammatory reaction was observed in 83% of immunocompetent and in 60% of immunosuppressed patients. In immunosuppressed patients a relationship between the chronic evolution of the disease and granuloma formation was demonstrated. A diffuse infiltrate of histiocytes with occasionally foamy appearance was noted in three biopsy specimens from three patients with AIDS. Acute and chronic panniculitis was detected in 8 biopsy specimens. In one biopsy (M. chelonae) an acute suppurative folliculitis was observed. Different histopathological patterns can be noted in biopsy specimens from cutaneous nontuberculous mycobacterial infections. The evolution of the disease and the immunologic status of the host may explain this spectrum of morphological changes. Tuberculoid, palisading and sarcoid-like granulomas, a diffuse infiltrate of histiocytic foamy cells, acute and chronic panniculitis, non-specific chronic inflammation, cutaneous abscesses, suppurative granulomas and necrotizing folliculitis can be detected. Suppurative granulomas are the most characteristic feature in skin biopsy specimens from cutaneous NTM infections. Some histopathological patterns seem more prevalent in immunosuppressed patients. |
| Databáze: | OpenAIRE |
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