The novel coronavirus (COVID-19) has changed people's lifestyles significantly. Herein, we examine how plastic surgery trends changed during the two-and-a-half years of the COVID-19 pandemic.
 We compared the number of plastic surgeries after the outbreak of COVID-19 (March 2020-July 2022) and average data over the past 5 years. In addition, we examined the difference in trends between the first half of the epidemic (waves 1-3) and the latter half (waves 4-6).
 The number of plastic surgeries during the COVID-19 epidemic decreased significantly (-13.3%) compared to the average year, and the rate of decrease was greater than that of other surgical procedures (-7.2%). In the acute disease group (trauma, bone and soft tissue infection, malignant tumor), the number of surgeries was lower than in the pre-pandemic period over the two-and-a-half years, with an average decrease of -17.0%, whereas the chronic disease group (benign tumor, chronic ulcers, congenital anomalies) showed an average decrease of only -2.0%. The number of operations for trauma and malignant tumors was particularly marked, ranging from -16.3 to -25.4%. Comparing the early (1st-3rd wave) and late (4th-6th wave) periods of the epidemic, the rate of decline was slow, with a -20.2% decrease in the early period and -7.4% in the late period.
 Plastic surgery was more affected by COVID-19 than other surgeries, which was mainly due to a decrease in the number of surgeries in the acute disease group. However, its influence diminished over time.

 Introduction: Accessory auricles are common congenital anomalies recognized as skin protrusions located from the side of the mouth to the preauricular area.
 Methods: The medical records of patients who visited our center with accessory auricles were retrospectively reviewed using records from 2003 to 2021. We compared age at initial visit, sex, laterality, number, location, shape, comorbidities, and treatment.
 Results: We included 584 patients with accessory auricles. The average age at initial visit was 9.4 months, and the total number of accessory auricles was 984. The most common location, shape, and treatment were middle preauricular area (66.7%), papule shape (32.0%), and surgery under general anesthesia (41.4%), respectively. A coexisting symptom occurred in 24.5% of the patients.
 Discussion: Our findings suggest that the accessory auricles were derived from the first pharyngeal arch. Patients who have accessory auricles in the buccal area have more accessory auricles and coexisting symptoms. Accessory auricles located in the cervical region seem to have a different origin from those around the auricular and buccal areas.

 Parasitic myoma is a condition in which the uterine fibroids detach completely from the uterus and receive a blood supply from other regions. In recent years, few studies have examined shredded myoma tissue fragments remaining in the abdominal cavity or abdominal wall after laparoscopic myomectomy or uterine evacuation surgeries that were assumed to be viable. Herein, we report the first case of parasitic myoma in the umbilical region. The patient underwent myomectomy and umbilicoplasty, and the wound was successfully closed.

 Schwannoma is a benign tumor that originates from Schwann cells of neurilemma, and is commonly localized in the head, neck, and extremities. Intramasseteric schwannoma is considered extremely rare. A 30-year-old female patient was referred to our hospital due to induration of her right cheek. Clinical examination revealed a painless, elastic, and hard mass in the right cheek. MRI revealed 16×10 mm lesion with iso signal intensity on T1-weighted imaging and high signal intensity on T2-weighted imaging in the masseter muscle. Resection of the tumor through an S-shaped incision (Blair incision) under general anesthesia was performed. Histopathological diagnosis of the lesion was schwannoma. Four years postoperatively, the patient has no tumor recurrence. In addition, possible postoperative complications, such as masseter atrophy and poor masticatory function, have not been observed. Herein, we report a rare case of schwannoma found in the masseter muscle, which was successfully resected in our institution.

 Foreign bodies in the foot are usually diagnosed by medical history and symptoms. We report a case of a needle in the foot that was asymptomatic for a long time. The patient was a 14-year-old male. A foreign body was accidentally found on the sole of the foot when taking an X-ray of the foot. The X-ray revealed a sewing needle with a length of 5 cm, which was removed by surgery. The foreign body was found to have entered the subplantar aponeurosis muscles. In this case, the foreign body on the sole of the foot may have moved under the tendon sheath by walking.

 Hair-thread tourniquet syndrome (HTTS) is a rare emergency that occurs when one or more appendages become circumferentially strangulated by human hair or thread. If left untreated, it can cause prolonged ischemia, resulting in tissue necrosis or autoamputation of the affected appendage, including fingers, toes, genitals, or uvula. HTTS of the toe usually occurs in children less than 1 year of age. Prompt recognition and immediate removal of the constricting material can prevent irreversible tissue damage and loss of the digit. Herein, we report a case of HTTS in a 4-month-old infant, presenting with erosion and swelling of the left fourth toe. The patient was treated immediately and recovered without complications.

 Locked metacarpophalangeal joint of a finger is a rare condition characterized by a loss of extension with little or no loss of flexion. Locking of the index to little fingers occurs less frequently than that of the thumb. Few cases have been reported, especially in the ring finger. We treated a 73-year-old man who presented with locking of the right ring finger. Locking of a metacarpophalangeal joint usually requires open reduction; however, in this case, manual reduction using the "Yagi method" was successful. This method of restoration is very effective and can be used in any clinical setting without requiring surgery. Our findings suggest that for treatment of locked finger, manual reduction should be attempted before open reduction.