Hwan Jun Choi

Dr. Hwan Jun Choi

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Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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10 October 2016 in International Wound Journal
Verified
Journal Article
Closed access
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BJByung‐Joon Jeon
Byung‐Joon Jeon
HCHwan Jun Choi
Hwan Jun Choi
JKJin Seok Kang
Jin Seok Kang
MTMin Sung Tak
Min Sung Tak
EPEun Soo Park
Eun Soo Park

1 January 2012 in Journal of Craniofacial Surgery
Verified
Journal Article
Closed access
HCHwan Jun Choi
Hwan Jun Choi
YLYoung Man Lee
Young Man Lee
JKJun Hyuk Kim
Jun Hyuk Kim
MTMin Seong Tark
Min Seong Tark
JLJang Hyun Lee
Jang Hyun Lee
Accessory parotid gland tissue has been described as salivary tissue adjacent to the Stensen duct that is distinctly separate from the main body of the parotid gland. Of all parotid gland tumors, 1% to 8% arise from the accessory parotid gland. Little is known about the accessory parotid gland, and it is seldom mentioned in the literature. Between 1999 and 2010, we have treated and followed 8 patients with tumors of the accessory parotid gland. There were 5 males and 3 females with a mean age of 35 years. They all presented with an asymptomatic cheek mass, and 4 of them underwent fine-needle aspiration. Ultrasound or computed tomographic scan was used in all patients. All the patients underwent surgical intervention with standard parotidectomy incision and anterior extension. The mean follow-up time was 44 months (range, 6-120 months). Seven patients had benign disease. Four cases were pleomorphic adenoma, and the remaining 3 benign cases were parotid cyst, basal cell adenoma, and hemangioma. Only 1 patient had a malignant tumor that was a lymphoepithelioma-like carcinoma. In 7 cases, wide excision (excision of mass and accessory lobe of the parotid gland) was done because of the intra-accessory parotid gland lesion. One patient had concomitant superficial parotidectomy because the tumor was located very close to and has involved the parotid gland proper. There was no serious postoperative complication and recurrence. Prudent preoperative diagnostic evaluation and meticulous surgical approach are the keys to successful management of midcheek lesions. A wide excision of the accessory lobe of the parotid gland can be a definitive surgery in case of solitary tumor with an intact parotid fascia, and wide excision with anterior approach through a standard parotidectomy incision is preferred to a direct incision over the mass.

11 October 2023 in International Wound Journal
Verified
Journal Article
Open access
HNHa Jong Nam
Ha Jong Nam
SWSyeo Young Wee
Syeo Young Wee
SKSe Young Kim
Se Young Kim
HJHyun Gyo Jeong
Hyun Gyo Jeong
DLDa Woon Lee
Da Woon Lee
HCHwan Jun Choi
Hwan Jun Choi
The increased peripheral arterial disease (PAD) incidence associated with aging and increased incidence of cardiovascular conditions underscores the significance of assessing lower limb perfusion. This study aims to report on the correlation and utility of two novel non‐invasive instruments: transcutaneous oxygen pressure (TcPO 2 ) and forward‐looking infrared (FLIR) thermography. A total of 68 patients diagnosed with diabetic foot ulcer and PAD who underwent vascular studies at a single institution between March 2022 and March 2023 were included. Cases with revascularization indications were treated by a cardiologist. Following the procedure, ambient TcPO 2 and FLIR thermography were recorded on postoperative days 1, 7, 14, 21 and 28. In impaired limbs, TcPO 2 was 12.3 ± 2 mmHg and FLIR thermography was 28.7 ± 0.9°C. TcPO 2 ( p = 0.002), FLIR thermography ( p = 0.015) and ankle–brachial index ( p = 0.047) values significantly reduced with greater vascular obstruction severity. Revascularization ( n = 39) significantly improved TcPO 2 (12.5 ± 1.7 to 19.1 ± 2.2 mmHg, p = 0.011) and FLIR (28.8 ± 1.8 to 32.6 ± 1.6°C; p = 0.018), especially in severe impaired angiosomes. TcPO 2 significantly increased immediately post‐procedure, then gradually, whereas the FLIR thermography values plateaued from day 1 to 28 post‐procedure. In conclusion, FLIR thermography is a viable non‐invasive tool for evaluating lower limb perfusion based on angiosomes, comparable with TcPO 2 .

10 July 2022 in International Wound Journal
Verified
Journal Article
Open access
DLDa Woon Lee
Da Woon Lee
SKSi Hyun Kim
Si Hyun Kim
AKAnd Jun Hyuk Kim
And Jun Hyuk Kim
HCHwan Jun Choi
Hwan Jun Choi
Diabetes mellitus (DM) causes various complications over time, one such complication is diabetic foot ulcers (DFU), which are challenging to treat and can lead to amputation. Additionally, a system for accurate prediction of amputation has yet to be developed. In total, 131 patients were included in the study after retrospectively collecting data from 2016 to 2020 about DFU. The collected data were used for comparison of the accuracy between five existing classification systems and the newly revised DIRECT coding system, and investigation of risk factors for lower extremity amputation (LEA). The existing five classification systems and DIRECT system can effectively predict LEA. The DIRECT3 system has three elements, C‐reactive protein (CRP), ulcer history (UH), and hypertension (HTN) in addition to those of the DIRECT system. It had a high predictive value and accuracy similar to that of Wagner and University of Texas (UT) on depth among the five classification systems. Among the statistically significant risk factors, duration of DM and HTN, haemoglobin (Hb), CRP, and UH showed an association with LEA. The DIRECT coding system is effective for predicting LEA and explaining appropriate treatment methods for DFU, and is widely applicable because of its user accessibility and convenience.

1 November 2013 in Journal of Craniofacial Surgery
Verified
Journal Article
Closed access
HCHwan Jun Choi
Hwan Jun Choi
JLJoo Chul Lee
Joo Chul Lee
JKJun Hyuk Kim
Jun Hyuk Kim
YLYoung Man Lee
Young Man Lee
HLHyun Joo Lee
Hyun Joo Lee
Hemangiomas are vascular anomalies characterized by increased proliferation and turnover of endothelial cells. Hemangiomas of the parotid region are relatively uncommon in adult population, and there are a few reports of hemangioma with large phlebolith within the parotid gland. We herein report a case of it. Sialography may be a useful investigation method in the evaluation of radiopaque lesions localized intraglandularly in the parotid area to rule out the sialolith. Cavernous hemangioma with phleboliths should be included in the differential diagnosis of a swelling in the mandibular area.

1 January 2014 in Archives of Craniofacial Surgery
Verified
Journal Article
Open access
KJKyu Hwa Jung
Kyu Hwa Jung
HCHwan Jun Choi
Hwan Jun Choi
DNDoo Hyun Nam
Doo Hyun Nam
Dermoid cysts of the auricular area are extremely rare. We report on six cases of auricular dermoid and epidermoid cyst, and differentiate dermoid cyst from epidermal cyst along with a review of the literature. Three cases involved a gradually enlarging mass of the superior and anterior aspect of the helix of their ear. Another two cases were located in the posterior aspect of the ear. During the operation, a tumor was found just under the skin, not fixed mastoid or adjacent cartilage. Histologically, all specimens contained desquamated squamous epithelium and keratin in the lumen. However, two cases of posterior masses showed the presence of adnexal structures and three cases did not. A key in diagnosis of the dermoid cyst is the presence of adnexal structures. If the wall does not bear adnexal structures, the term epidermoid or keratin cyst is applied. Acquired cysts are most commonly of traumatic origin and result from an implantation or downward displacement of an epidermal fragment. Finally, the congenital epidermoid cyst grew at the upper part of the auricle; however, the dermoid cyst grew at the lower and posterior part of the auricle.