NUMERO: #20250154

Título: Unusual occurrence of actinomycosis in dorsum posterior of the tongue

Nome do Apresentador: Gabriela Lopes Dos SANTOS

Categoria do Trabalho: Painel de caso clínico (PCC)

Área Temática: Patologia Oral

Resumo: Actinomycosis of the tongue is a rare suppurative infection, often
mimicking benign or malignant neoplasms. The diagnosis of oral actinomycosis can be
challenging. A 48-year-old male presented with a 2.5 cm ulcer in posterior dorsum of the
tongue, with indurated borders, a necrotic center and a rapid growth over 30 days was
observed. The patient showing dysphagia. Clinical diagnosis was squamous cell carcinoma.
An incisional biopsy was performed, and the material sent for histopathological analysis.
Microscopically, an extensive abscess with polymorphonuclear leukocytes and fibrin
surrounded filamentous bacterial colonies in a radiating pattern, suggestive of Actinomyces
israelli was observed. The bacterial colonies showed positivity for PAS and Brown Brenn stainings and Grocott Methenamine Silver staining was negative. Additionally, the oral mucosa consisting of parakeratinized squamous epithelium with
pseudoepitheliomatous hyperplasia and PMN exocytosis, and a dense inflammatory infiltrate with sulfur granules in connective tissue were also observed. The patient was
referred to an infectious physician and achieved complete lesion remission after treatment

Autor 1:  Gabriela Lopes Dos SANTOS

E-mail 1:  [email protected]

Autor 2:   Marcelo Junior ZANDA

E-mail 2: 

Autor 3 :  Cleverson Teixeira SOARES

E-mail 3: 

Autor 4:  Denise Tostes OLIVEIRA

E-mail 4:  [email protected]