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Introduction The subepithelial connective tissue graft (SCTG) and flap combination is a highly predictable root coverage procedure, with low complication rates. To our knowledge, this article reports the first case of two late SCTG complications, epithelial cell discharge, and subsequent epidermal inclusion cyst (EIC) formation. Case Presentation A 35‐year‐old male presented with a 3‐mm deep Miller Class II recession defect on the mandibular right canine and mesial root of mandibular right first molar. A mild discomfort was reported at 8 weeks after envelope flap+SCTG in #27. At 4 months after the procedure, the patient presented with persistent discomfort and minimally compressible recipient site diffuse swelling with discharge, which was cytologically diagnosed as normal epithelial cells. One year postoperatively, enlargement of the lesion was seen, and excisional biopsy was performed simultaneously with SCTG in #30. The lesion was diagnosed as EIC. At 8 months follow‐up, the site healed uneventfully, the patient remained asymptomatic, and the site exhibited scar formation and no recurrence of the lesion. Conclusion This report highlights epithelial cell discharge and EIC formation as a rare yet possible SCTG complication and emphasizes the importance of an excisional biopsy as the means to obtain a definitive diagnosis and manage this complication.

Soft tissue sarcomas of the esophagus represent an extremely rare cause of esophageal masses, and an even smaller proportion of these tumors represent dedifferentiated liposarcomas. We present a case of a 75-year-old gentleman presenting with dysphagia found to have a 5 cm pedunculated mass in the cervical esophagus, originating at the cricopharyngeus. This was found to have involvement limited to the superficial mucosa by endoscopic ultrasound, and the lesion was subsequently resected endoscopically. Pathology demonstrated an undifferentiated pleomorphic sarcoma later determined to represent dedifferentiated liposarcoma after fluorescence in situ hybridization analysis. The patient received no additional adjuvant therapy and remains disease free 20 months from the procedure. While treatment experience is limited, our case demonstrates that in selected patients, sustained local control can be obtained without radical resection.

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between the tracked position and the ground truth position in 3D space. In addition, the calculation time was measured on a workstation (Intel XeonÒ CPU @ 3.6 GHz). Results: The mean positional error for three patients was measured to be 0.32 mm with a standard deviation of 0.17 mm. The worst positional error was 1.1 mm. For the first, second and third patient, the mean errors were 0.38, 0.26 and 0.32 mm with a standard deviation of 0.16, 0.13 and 0.16 mm, respectively. The calculation time was within 50.4 milliseconds per frame. Conclusion: We presented real-time linear fiducial marker tracking for respiratory-gated radiotherapy with a DNN framework. We performed experiments involving three live patients with our proposed method and obtained high accuracy and short computation time.

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