CLINICOPATHOLOGIC AND IMMUNOHISTOCHEMICAL FEATURES OF 2 CASES OF SOLITARY FIBROUS TUMOR OF THE ORAL CAVITY

CLINICOPATHOLOGIC AND IMMUNOHISTOCHEMICAL FEATURES OF 2 CASES OF SOLITARY FIBROUS TUMOR OF THE ORAL CAVITY

ABSTRACTS e116 of the lower lip, and buccal mucosa. Case 3 is that of a 70-yearold man referred with burning symptoms in the mouth lasting a few mon...

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ABSTRACTS

e116

of the lower lip, and buccal mucosa. Case 3 is that of a 70-yearold man referred with burning symptoms in the mouth lasting a few months. Intraoral examination revealed erythematous areas surrounded by a white halo in the tongue and labial and buccal mucosa. Diagnosis in all 3 cases was GS, and patients were oriented about the condition and prescribed mouthwashes for relief of the burning sensation.

EOSINOPHILIC ULCER OF THE TONGUE: A CASE REPORT. LARISSA CONRADO DA SILVA, BEATRIZ DA ROCHA MIRANDA  VENTURI, NATHALIA DE ALMEIDA FREIRE, MARIO e  JOSE ROMANACH, BRUNO AUGUSTO BENEVENUTO DE ANDRADE, RAQUEL REGO VANZILLOTTA and,  CESAR WERNECK NOCE DOS SANTOS Eosinophilic ulcer is an uncommon, benign, self-limiting lesion of unknown etiology that may affect the tongue of a wide range of patients. A 49-year-old man was referred for evaluation of a painful 1.5-cm well-defined ulcer with hardened whitish margins located in the lateral border of the tongue, with duration of 1 month. Patient’s history included radiotherapy and chemotherapy for cervical metastatic carcinoma of unknown primary tumor. Incisional biopsy results showed an ulcer covered by fibrinopurulent membrane, exhibiting mixed inflammatory infiltrate with occasional eosinophils. The final diagnosis was of eosinophilic ulcer. The lesion decreased in size but persisted after the biopsy. Complete resolution of the lesion was observed after weekly intralesional injections of triamcinolone acetonide. No recurrence was observed after follow-up of 6 months. Eosinophilic ulcer may clinically mimic oral squamous cell carcinoma.

CLINICOPATHOLOGIC AND IMMUNOHISTOCHEMICAL FEATURES OF 2 CASES OF SOLITARY FIBROUS TUMOR OF THE ORAL CAVITY. LIVIA RAMALHO CRESCENCIO, CAROLINA EMERICK DA SILVA RANGEL, RENATA TUCCI, KARLA BIANCA FERNANDES DA COSTA FONTES, PRISCILLA ^  RODRIGUES CAMARA, JORGE ESQUICHE LEON and, REBECA DE SOUZA AZEVEDO Solitary fibrous tumor (SFT) is an uncommon soft tissue tumor that usually occurs in the pleura, but it is extremely rarely in the oral cavity. It presents an extensive microscopic diversity that may turn the diagnosis into a challenge. This is the report of 2 new cases of SFT in the buccal mucosa and tongue highlighting the clinical, microscopic, and immunohistochemical variations. The study included 2 women at 49 and 80 years old. Clinically, they were slow-growing, painless, small, well-defined submucosal masses. Microscopic examination showed well-circumscribed spindle cell proliferations associated with alternating dense hyalinization areas and characteristic stag horn-shaped blood vessels in variable arrangements. Immunohistochemistry showed consistently positivity for CD34 and vimentin, alternating positivity for Bcl-2 and epithelial membrane antigen and negativity for S-100. Patients are well with no recurrence or relapse.

EOSINOPHILIC ULCER: REPORT OF 4 CASES. DANIELLE RESENDE CAMISASCA, EMANUELY RONCONI DA FONSECA, ^ e TANIA REGINA GRAO VELLOSO, DANIELA

OOOO January 2020 NASCIMENTO SILVA, MARTHA ALAYDA ALCANTARA SALIM and, LILIANA APARECIDA PIMENTA DE BARROS Eosinophilic ulcer (EU) is a chronic, benign, and self-limiting condition, more common in the tongue of men. This study reports 4 patients diagnosed as having EU. Of the cases studied, 3 involved men and 1 involved a woman, with a mean age of 60 years. All lesions were described as ulcers covered by a membrane of fibrin with raised margins, which were rigid to touch, and a red halo located at lateral tongue. The mean lesion size was 1.45 cm, and the lesions were present for 10 to 60 days. Squamous cell carcinoma was among probable diagnostic hypothesis in all cases. An incisional biopsy was performed, and the histopathologic analysis revealed an EU in all cases with intense inflammatory infiltrate and presence of eosinophils. After the biopsy and removal of the causative agent (if detected), all the lesions regressed. Performing a biopsy is extremely important to differentiate EU from squamous cell carcinoma.

LASER THERAPY FOR THE TREATMENT OF CHEMICAL INJURY BY BLEACHING GEL: CLINICAL CASE REPORT. LUARA SAMPAIO DOS SANTOS, MARIA CAROLINA DE LIMA JACY MONTEIRO BARKI, KARLA BIANCA FERNANDES DA COSTA FONTES, RENATA TUCCI, REBECA DE SOUZA AZEVEDO, RAFAELA ELVIRA ROZZA-DE-MENEZES and, BRUNA LAVINAS SAYED PICCIANI Our aim is to report a case of gingival tissue damage induced by peroxide-based bleaching agent that was treated efficiently with low-level laser therapy (LLLT). A 23-year-old woman came to our oral diagnosis clinic complaining of a painful oral lesion that appeared after dental bleaching procedure using 37% phosphoric acid. Oral examination revealed a white plaque lesion on the marginal gingiva from #11 to #15 and erosion in the alveolar mucosa. The clinical diagnosis of chemical injury was made, and the LLLT (660 nm, InGaAIP, 100 mW of power, 4 J of energy, Flash laser III, DMC) was applied. The improvement of pain and total remission of the lesion was seen after 3 weekly sessions of LLLT. Topical application of Fibrase ointment was prescribed 4 times daily for 7 days. All dentists should be aware of this lesion to prevent their development during dental bleaching. The LLLT was effective in terms of accelerating tissue repair.

MANDIBLE BROWN TUMOR ASSOCIATED WITH HYPERPARATHYROIDISM SECONDARY TO CHRONIC RENAL INSUFFICIENCY: CASE REPORT. LUIZ ADRIANO TEIXEIRA DO REGO BARROS, LETICIA RODRIGUES DE OLIVEIRA, JOSE e DE LIMA, TANIA ^ JAYME GALVAO CRISTINA PEDROSO MONTANO, ITAMARA LUCIA ITAGIBA NEVES, e NEVES and, MARCELA ALVES DOS RICARDO SIMOES SANTOS PAUL Chronic renal disease decreases serum calcium level contributing to excess parathyroid hormone (PTH) synthesis. As more PTH is available, a significant change in osteoclastic activity can lead to bone focal well-defined lytic lesions known as brown tumor. We report a case of a 30-year-old female patient referred to our clinic with a chief complaint of a painful swelling of the left mandible and difficulty chewing. Her medical history included systemic lupus erythematosus, hypertension, and