Copyright@ Atsushi Ochiai | Biomed J Sci & Tech Res | BJSTR. MS.ID.006589. 32605 Review Article ISSN: 2574 -1241 DOI: 10.26717/BJSTR.2022.41.006589 Tumors Originating from Fat Tissue in the Head and Neck Area: A Review of 40 Cases Atsushi Ochiai* Department of Otolaryngology-Head and Neck Surgery, School of Medicine, Kitasato University, Japan *Corresponding author: Atsushi Ochiai, Department of Otolaryngology-Head and Neck Surgery, School of Medicine, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara-shi, Kanagawa, 252-0374, Japan ARTICLE INFO ABSTRACT Received: January 17, 2022 Published: January 26, 2022 Citation: Atsushi Ochiai. Tumors Orig- inating from Fat Tissue in the Head and Neck Area: A Review of 40 Cases. Bi- omed J Sci & Tech Res 41(2)-2022. BJSTR. MS.ID.006589. Keywords: Lipoma; Age; Sex; Chief com- plaints; Growth style; Size; Primary le- sion; Treatment; Complications; Progno- sis Objectives: To clarify the features of lipomas that had been operated on in Kitasato University Hospital (KUH) and diagnosed by reviewing a series of cases. Method: All patients having undergone tumor removal between January 2000 and December 2021. Patients were identified through pathology department records. Results: Ages ranged from 2 to 80 years, with an average age of 47.1 years. Lipomas were benign in 38 cases and malignant in 2 cases. All 38 lipomas required only surgery. In cases of lipoma, 3 cases developed complications after surgery. In the cases of lipoma, although postoperative results were varied and changing, there were no recurrences. Conclusion: Clinical files were reviewed for 40 patients. Lipomas were benign in 38 cases and malignant in 2 cases. Complications after surgery were seen in 3 cases. Although treatment requires total removal, in some cases require preoperative or postoperative chemotherapy and radiotherapy. Abbreviations: KUH: Kitasato University Hospital; RLN: Recurrent Laryngeal Nerve; CT: Computed Tomography; MRI: Magnetic Resonance Imaging Introduction Lipomas, including spindle cell lipomas, pleomorphic lipomas, angiolipomas, lipoblastomas, and so on are benign tumors originating from fat tissue. Lipomas are the most frequently occurring benign tumors, and most lipomas arise subcutaneously. Liposarcoma is a malignant tumor consisting of a lipoblast. But, the degree of differentiation among all of these tumors are various, and the growth speed, metastasis, and prognosis of these tumors differ substantially by histological type. I therefore undertook this study to clarify the features of lipomas that had been operated on in Kitasato University Hospital (KUH) and diagnosed by reviewing a series of cases. Materials and Methods A. Ethical Consideration: patients included in this study were not subject to any harm. I ensured all patients had their privacy protected by ensuring anonymity of the data collected. B. Study Design: A retrospective study of all patients who underwent tumor removal. C. Setting: All patients having undergone tumor removal at Department of Otolaryngology-Head and Neck Surgery, KUH between January 2000 and December 2021. Patients were identified through pathology department records.