Successful treatment of refractory oral condyloma acuminatum through laser-photodynamic therapy combination.

Condyloma acuminatum (CA) is a sexually transmitted disease primarily caused by human papilloma virus (HPV) infection, predominantly affecting the genital and anal regions. However, the occurrence of oral condyloma acuminatum (OCA) is relatively infrequent, although its incidence has been gradually rising in recent years. OCA presents unique challenges in terms of treatment efficacy and recurrence prevention due to its concealed location and distinctive anatomical characteristics. In this manuscript, we present a case study involving the use of laser combined with photodynamic therapy (PDT) for managing hard palate OCA. The occurrence of warts in the hard jaw near the soft palate posed challenges during PDT due to involuntary swallowing and nausea. By modifying the conventional PDT approach and replacing the dressing with a cotton swab, the patient experience is more comfortable and therapeutic outcomes is more effective. Remarkably, the procedure resulted in minimal scarring post-operation. The combined approach of laser and PDT demonstrates promising results as a rapid and well-tolerated treatment modality for OCA.

A molybdenum disulfide/reduced graphene oxide fiber coating coupled with gas chromatography-mass spectrometry for the saponification-headspace solid-phase microextraction of polychlorinated biphenyls in food.

In this work, the molybdenum disulfide/reduced graphene oxide (MoS2/RGO) composite material was synthesized as a fiber coating to extract seven indicator polychlorinated biphenyls (PCBs; PCB28, PCB52, PCB101, PCB118, PCB138, PCB153, and PCB180) present in food via a saponification-headspace solid-phase microextraction assay (saponification-HS-SPME). The MoS2/RGO coating was prepared and deposited on a stainless steel wire with the help of a silicone sealant and used as an SPME fiber. The alkali solution dissolved the fat and helped in releasing the PCBs present in milk to the headspace for extraction under 100°C. Following desorption in the inlet, the targets were quantified by gas chromatography-mass spectrometry. The effects of sorbent dosage, extraction time, added salts, and stirring rate on the extraction efficiency were investigated. The new coating was able to adsorb a higher amount of analytes, which was about 1.1-2.9 times in comparison with the commercially available SPME fiber (coated with divinylbenzene/carboxen/polydimethylsiloxane). It also showed the highest adsorption capability toward PCBs, which was 1.5-2.7 times that of the prepared RGO modified fiber. Moreover, MoS2 also showed a strong affinity toward PCBs in a manner similar to its affinity for graphene. The developed method is simple and environmentally friendly as it does not require any organic solvents. Furthermore, it exhibits good sensitivity with detection limits less than 0.1ngmL-1, linearity (0.25-100ngmL-1), and reproducibility (relative standard deviation below 10% for n=3). The novel SPME fibers are inexpensive, reusable, and can be easily prepared and manipulated. In addition, the saponification-HS-SPME assay was also found to be suitable for screening persistent organic pollutants in dairy products.