We report a case of atypical microtia with a low and highly anteriorly bent auricle. Surgery was performed in two stages. The auricle was moved cephalad and opened, and aplasty was performed for a buried ear deformity and hypoplasia of the auricle. Six years after surgery, the reconstructed auricle maintained good morphology.
 Atypical microtia should be treated comprehensively with attention to morphology, careful preoperative planning, appropriate surgical combination, and long-term follow-up.

 We report a case of a 2-year-old girl who presented with depression and a keratinized protrusion under the nail of the left little finger since birth. Plain X-ray revealed no abnormalities of the distal phalanges, and there was no history of trauma; therefore, we diagnosed as congenital ectopic nail. We performed surgery, and the histopathological findings were consistent with the diagnosis. Eight months postoperatively, no recurrence was observed. Congenital ectopic nail is a relatively rare disease whose etiologic cause remains unclear. Further accumulation of cases is warranted in the future.

 Eccrine porocarcinoma is a rare malignant tumor that usually develops in the lower extremities, head, and neck of elderly people. Its management includes resection of the primary lesion. We experienced a 79-year-old woman with an eccrine porocarcinoma of the right buttock, with metastasis to the inguinal and external iliac lymph nodes. The patient presented with swelling and pain in her right lower extremity. A lymph node biopsy was performed, and the tumor was confirmed to be an eccrine porocarcinoma. We performed lymphadenectomy with a tumor resection margin of 2 cm. In the treatment of patients with lymph node metastases, appropriate lymph node dissection is necessary to maintain a good postoperative prognosis.

 Scleredema is a rare connective tissue disorder characterized by diffuse, nonpitting edema and skin induration spreading from the neck region to the trunk and upper limbs. In diabetic patients without preceding infections or other skin disorders, it is diagnosed as diabetic scleredema after excluding other skin disorders such as scleroderma. We encountered two cases of scleredema: one managed with observation due to poor diabetes control and one managed with surgical excision. The symptoms remained unchanged in the first case, but the second case achieved a favorable outcome without recurrence. The diagnosis was confirmed by pathological findings, as there are no specific imaging findings for this disease. A tissue biopsy should be proactively considered if this disease is suspected. To the best of our knowledge, there are no reports for surgical excision for scleredema. Our findings suggest that surgical treatment may be viable, as one of our cases achieved functional and morphological improvements following excision.

 Chronic expanding hematoma (CEH) is a hematoma that persists for > 1 month and gradually increases after trauma or surgery. Herein, we present a case of a 73-year-old man with CEH in his right thigh. He had sustained a contusion in a traffic accident approximately 10 years before. Two years after the accident, two subcutaneous masses were discovered in his proximal right thigh. Eight years later, another subcutaneous mass was observed in the distal part of the same thigh. All three masses were surgically removed, and CEH was diagnosed based on the clinical course, imaging, and pathological examination. The first two masses were thought to be related to the traffic accident. The cause of the third mass was uncertain; however, minor trauma and anticoagulant medication may have contributed to its development. A detailed history is important to determine the cause of CEH development.

 A burn at the return electrode site is an iatrogenic disease that can occur during surgery. Moreover, it has recently been observed to occur even in the community setting, because of the growing interest in alternative medicine and the diversification of treatment equipment. We report a case of a deep burn after diathermy therapy. A 15-year-old female patient suffered a deep burn due to contact with the return electrode during diathermy therapy at an osteopathic clinic. After autolytic and surgical debridement, reconstruction with a local skin flap was performed. The postoperative course was favorable. Our findings suggest the need to pay attention to this issue and educate non-medical professionals, such as estheticians, about the accurate use of return electrodes.