Myxoid liposarcoma of the oral cavity with involvement of the periodontal tissues

Atypical Lipomatous Tumor/Well-Differentiated Liposarcoma Arising from the Tongue: case report

<p>Liposarcomas are common mesenchymal malignant tumors arising from adipose tissue. Although liposarcomas are the most frequent type of soft tissue sarcomas, accounting for approximately 20% of all soft tissue sarcomas, they are rare in the head and neck, particularly in the oral cavity. Oral liposarcomas have been reported to occur mainly on the buccal mucosa, with other sites including the floor of the mouth, tongue, palate, and mandible. This report describes a 76-year-old male patient with an atypical lipomatous tumor/well-differentiated liposarcoma of the tongue that underwent surgical excision. This report also reviews published data on these rare tumors.

Liposarcoma of oral cavity: Systematic review of cases reported to date and analysis of prognostic factors

The aim of this study was to integrate the available data published on Liposarcomas (LPSs) of the oral cavity into an analysis of its clinical features, treatment modalities, and prognostic factors. An electronic search was undertaken in January 2019. The eligibility criteria included publications that had enough clinical and histological information to confirm the diagnosis. Forty-five publications (104 LPSs) were included. The lesion was more prevalent in males from the fifth to seventh decades of life. Treatment (P = .03) and distant metastasis (P = .0001) were independently associated with survival. A lower possibility of recurrence was statistically associated with age (younger patients) (P = .03), tumor size (smaller than 2.8 cm) (P = .001), and treatment (radical surgery) (P = .04). LPS presents a good survival for patients after 5 years of follow-up (66.4%). Patients who were treated with conservative surgery and presented with distant metastasis showed poor prognosis.

Oral liposarcoma in elderly: Case report and literature analysis

RATIONALE

Oral liposarcoma is an extremely rare lesion that is often clinically misdiagnosed as a benign lesion because of its asymptomatic and indolent clinical course. we report a case of atypical lipomatous tumor/well-differentiated liposarcoma (ALT/WDL) of buccal mucosa, provisionally diagnosed as lipoma.

PATIENT CONCERNS

A 97-year-old female was referred to dentistry and oral surgery department with an asymptomatic mass on the right buccal mucosa which had been present for an unknown period of time.

DIAGNOSIS

Magnetic resonance imaging demonstrated a well-circumscribed lesion at the right buccal mucosa, and a lipoma was suspected.

INTERVENTIONS

Surgical removal was performed, and a diagnosis of ALT/WDL was made. She and her family refused additional treatment due to her age.

OUTCOMES

At the 10 months follow-up, the patient remained free of disease.

LESSONS

The indolent clinical course and small size of oral liposarcoma can lead to provisional clinical diagnosis of benign lesion.

Huge lipoma of tongue

Lipoma is the commonest benign tumor occurring at any anatomical site, where fat is present. In oral cavity and oropharynx, it is a relatively uncommon neoplasm. Tongue, which is totally devoid of fat cell is also a site for lipoma but very rarely. We report one such rare case of the universal tumor, of 20 years of duration and 9 cm in size, presenting at the lateral margin, dorsal and ventral surface of the tongue, for which complete tumor excision was done.

Detection of TLS/FUS-CHOP fusion transcripts in a case of oral liposarcoma

OBJECTIVE

The aim of this study was to detect the chromosomal translocation t(12;16)(q13;p11) that leads to a gene fusion encoding a FUS-CHOP chimeric protein and has been shown to be highly characteristic of myxoid and round cell subtypes of liposarcoma, in a case of oral myxoid liposarcoma.

METHOD AND MATERIALS

Nested reverse transcriptase-polymerase chain reaction to detect the TLS/FUS-CHOP fusion gene transcript was performed. A case of inflammatory fibrous hyperplasia and a case of oral lipoma were included as negative controls.

RESULTS

Only the myxoid oral liposarcoma showed a 103-base pair product, specific of TLS/FUS-CHOP fusion type II transcript.

CONCLUSION

The identification of FUS-CHOP transcript is potentially useful in the diagnosis and research of oral liposarcomas.

Dedifferentiated liposarcoma of the oral cavity with angiosarcomatous dedifferentiation

We report a unique case of a 42-year-old woman with a dedifferentiated liposarcoma of the soft tissue of the oral cavity with angiosarcomatous dedifferentiation. Liposarcomas compromising the head and neck region are very unusual, and most of the cases in oral cavity show a well-differentiated pattern. Dedifferentiation in liposarcomas occurs in about 10% of the cases and, when it occurs, the dedifferentiated areas usually resemble high-grade fibrosarcoma or pleomorphic sarcoma. Divergent differentiation might also occur. To the best of our knowledge, there are only nine cases of dedifferentiated liposarcoma of the oral cavity, none of which show an angiosarcomatous dedifferentiation.

Liposarcoma circumscriptum (lipoma-like) of the tongue: report of a case

Liposarcoma, first described by Virchow in 1857, is the second most frequent sarcoma of soft tissues, although it is rare both in the head and neck and the oral cavity. Intra-orally, liposarcoma has been reported in the jawbones (particularly the maxilla) and the soft tissues -- mainly the cheek and floor of mouth, but it is rare in the tongue. A case of well-differentiated, superficial liposarcoma circumscriptum of the tongue is reported. The authors underline the difficulties in the clinical and histopathological diagnosis, as this tumour may be confused with lipoma. In view of the indolent behaviour of this tumour type, local recurrence or metastasis rarely occur; consequently, conservative surgical therapy is advised without adjuvant chemo-radio therapy.