Publications by authors named "P Daniel Knott"

212 Publications

Outcomes of Vascularized Versus Nonvascularized Adipofascial Grafts for Parotidectomy Reconstruction.

Facial Plast Surg Aesthet Med 2022 Jul 18. Epub 2022 Jul 18.

Department of Otolaryngology Head and Neck Surgery, University of California San Francisco, San Francisco, California, USA.

Parotidectomy defects can leave patients with considerable functional and cosmetic deformities. We aim to compare the success rates and complications associated with vascularized versus nonvascularized adipofascial grafts for reconstruction, including flap failure, return to surgery, infection, and delay to adjuvant treatment. Retrospective case series of patients undergoing either adipofascial anterolateral thigh (AFALT) free tissue transfer or free fat transfer (FFT) after parotidectomy from January 2010 to January 2020. Group comparisons and logistic regression were used to determine predictors of outcome measures. Seventy-six patients underwent AFALT reconstruction, and 73 patients underwent FFT reconstruction. Patients treated with AFALT reconstruction had more aggressive tumor characteristics and underwent more complex resections, most commonly radical parotidectomy ( = 55, 72.4%). Postoperative complications at both the donor and recipient sites were more common in the FFT group ( = 20, 27.4% in FFT vs.  = 11, 14.5% in AFALT, odds ratio = 0.45, 95% confidence interval = 0.20-1.02,  = 0.052). Although used in more advanced disease and in a more heavily treated wound bed, the AFALT free flap was safe and associated with fewer infectious complications than that offered by FFT.
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http://dx.doi.org/10.1089/fpsam.2022.0048DOI Listing
July 2022

Sex-Related Characteristics of the Face.

Otolaryngol Clin North Am 2022 Aug 21;55(4):775-783. Epub 2022 Jun 21.

Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology- Head and Neck Surgery, University of California San Francisco, 2233 Post Street, 3rd Floor, San Francisco, CA 94115, USA. Electronic address:

The face is central to individual identity and gender presentation. Sex-based differences are seen at nearly every component of the face, from craniofacial structure to skin and soft tissue distribution. This article provides a framework for identification and analysis of sex-based differences in facial anatomy. This can then be used to guide individualized approaches to surgical planning to create greater congruence between patients' existing physical features and goals for gender expression.
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http://dx.doi.org/10.1016/j.otc.2022.04.012DOI Listing
August 2022

Clinical Feasibility and Efficacy of the Externally Scarless Transoral Chondrolaryngoplasty.

Facial Plast Surg Aesthet Med 2022 May 2. Epub 2022 May 2.

Division of Facial Plastic and Reconstructive Surgery, Department of Otolaryngology-Head and Neck Surgery, University of California San Francisco, San Francisco, California, USA.

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http://dx.doi.org/10.1089/fpsam.2021.0295DOI Listing
May 2022

Hip Pain Increases With Age and Experience Level in Adult Karate Athletes: A Statewide Survey Study.

Arthrosc Sports Med Rehabil 2022 Apr 7;4(2):e325-e333. Epub 2021 Dec 7.

American Hip Institute Research Foundation, Chicago.

Purpose: To investigate the prevalence of hip pain from labral tears and femoroacetabular impingement (FAI) in karate athletes using a statewide online survey.

Methods: An anonymous electronic survey was distributed via Qualtrics to all registered members of a statewide karate organization who were a purple belt or higher. Basic demographic information was collected as well as belt level, competitive level, and information regarding hip pain and treatment for hip pain. Microsoft Excel was used to store and analyze data.

Results: Of 180 respondents, 123 (68.3%) never had hip pain when practicing karate, and 54 (30.0%) had hip pain at some point in their karate career. Three subjects did not provide an answer and were excluded. Furthermore, of the symptomatic individuals, 52 reported the location of their hip pain, whereas 2 subjects did not. Of the symptomatic individuals (54), 32 had formal diagnoses by a medical professional, 4 (12.5%) were diagnosed with FAI of the hip, 6 (18.8%) diagnosed with a hip labral tear, 3 (9.4%) diagnosed with hip bursitis, 3 (9.4%) diagnosed with hip arthritis, and 16 (50%) had other diagnoses. The remaining 22 participants have not received a formal diagnosis by a medical professional.

Conclusions: The prevalence of hip pain in karate athletes in this survey was lower compared to athletes of other martial arts and kicking sports. No differences in the percentage of injuries were found between sex and years practiced; however a higher incidence of hip pain was found between elite status and age group. When evaluating hip pain in the karate population, orthopaedic surgeons should maintain an index of suspicion for FAI and hip labral tears.

Level Of Evidence: Level IV, retrospective cross-sectional study.
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http://dx.doi.org/10.1016/j.asmr.2021.10.003DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9042759PMC
April 2022
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