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Large cell undifferentiated carcinoma of parotid gland is a rare disease of salivary gland cancer accounting about 1%, however, it has high malignancy and very poor prosgnosis. We report a clinical case with symptoms of left parotid gland tumor, rapid growth , invasive skin and superficial ulceration . The differential diagnosis is difficult between parotid adenocarcinoma and skin cancer or metastatic cervical lymphoma. The patient underwent extensive surgical resection of the lesion, radical cervical lymphadenectomy, and reconstruction with local flaps. The definitive diagnosis after surgery: large cell undifferentiated carcinoma of the left parotid gland stage IV (pT4aN0M0). The patient did not receive early radiation therapy, therefore local recurrence and distal metastasis, and death 6 months after surgery.

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Objective: To evaluate the treatment results of mandibular condylar fractures for prescription of more appropriate treatment methods. Methods: This is a retrospective and prospective cross-sectional study with follow-up on 95 patients treated for mandibular condylar fractures at 108 Central Military Hospital from January 2018 to October 2021. Results: A total of 95 condylar fractures were observed, including 75 unilateral fractures and 20 bilateral fractures. The most common fracture locations are: low condylar neck 53/115 (46.1%), condylar head 27/115 (23.5%), high condylar neck 22/115 (19.1%), subcondylar 13/115 (11.3%). Little deviation 13/115 (11.3), average deviation 79/115 (68.7%), high deviation 23/115 (20%). Conservative treatment for 18/115 condyle with good and satisfactory results accounted for 89.3%. Surgical removal of 33/115 condyles with good and satisfactory results accounted for 89.3%. Fracture osteosynthesis for 64/115 condyles with good and satisfactory results accounted for 96.2%. Conclusion: Conservative treatment should be indicated for cases with small or no displacement and condylar removal surgery for cases of condylar fractures or multi-fragment high condylar fractures with moderate and high displacement. The indication of osteosynthesis for low condylar neck and subcondylar fractures will have a high success rate.