A 57-year-old man presented with a pigmented papule, 0.4 cm in diameter, on the left lower eyelid. Skin biopsy revealed a basal cell carcinoma, which was excised through a wide excision followed by a full-thickness skin graft (FTSG). Two weeks after the surgery, an erythematous nodule developed in the lower margin of the graft recipient site. The nodule size increased rapidly over 2 weeks, becoming dome-shaped with a central hyperkeratotic plug. A diagnosis of keratoacanthoma (KA) was made, and surgical excision was performed. Histological findings revealed a large, well-differentiated squamous tumor with a central keratin-filled crater and buttress. The human papilloma virus (HPV) genotyping results were negative. Risk factors for KA include trauma, old age, exposure to ultraviolet (UV) radiation, immunosuppression, and HPV infection. KA has most often been reported to develop at the donor site. Although the pathogenesis of KA is unclear, trauma is believed to act as a second insult to a preceding oncogenic insult, such as exposure to UV radiation, resulting in a koebnerization. Herein, we report a case of solitary KA at a FTSG recipient site. This report presents information that may provide guidance during dermatologic surgeries.
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http://dx.doi.org/10.1055/a-1988-2869 | DOI Listing |
Xenotransplantation (XTx) is an increasingly realistic solution to the organ shortage. Clinical XTx may require off-site procurement in a designated pathogen free (DPF) facility necessitating a period of cold ischemic time during transportation. This study evaluates the impact of different kidney preservation strategies on early graft function in pig-to-baboon XTx in a series of eight cases of pig-to-baboon xenotransplantation performed after five hours of cold ischemic time and compares these results to six cases of pig-to-baboon xenotransplantation performed with minimal ischemic time.
View Article and Find Full Text PDFTrials
January 2025
Urological Research Unit, Department of Urology, Centre for Cancer and Organ Diseases, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark.
Background: Kidney transplantation is the ultimate treatment for end-stage kidney disease. Function of the kidney graft is not only dependent on medical factors but also on a complication-free surgical procedure. In the event of major surgical complications, the kidney graft is potentially lost and the patient will return to the waiting list which may be long.
View Article and Find Full Text PDFJAMA Intern Med
January 2025
Department of Population Medicine, Harvard Pilgrim Health Care Institute, Boston, Massachusetts.
JPRAS Open
March 2025
Department of Plastic & Reconstructive Surgery, Hospital Universitario Son Espases, Palma de Mallorca, Balearic Islands, Spain.
Introduction: Extensive scalp defects present a significant reconstructive challenge due to the complex needs of patients that are often beyond the scope of conventional therapies, which makes free flaps the most reliable solution. Despite the variety of free flaps available for such cases, there is a lack of clear criteria for selecting the most suitable option. The primary objective of this study was to provide a simplified guide for the selection of donor sites for free flaps for achieving optimal reconstruction outcomes.
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