Background: Although nail psoriasis is a common manifestation among patients with psoriasis, large-scale research exploring the association between nail psoriasis lesions and their intra-nail locations has not been conducted. This study is necessary to elucidate the shared pathophysiology among various phenotypes of nail psoriasis. Objective: We aimed to understand the association between nail psoriasis lesions and analyze their intra-nail locations. Methods: We obtained a total of 5,602 cropped fingernail images from 636 patients with psoriasis. We employed the Computer Vision Annotation Tool to annotate the intra-nail locations of nail psoriasis lesions. We computed χ 2 statistic to examine the relationship between nail psoriasis lesions and conducted an analysis of their intra-nail locations. Results: Based on the number of lesions, nail pitting was the most common, followed by leukonychia, with the red spots in the lunula being the rarest. We elucidated the associations between different nail psoriasis lesions, pinpointing a significant association between onycholysis and oil spots (χ 2 statistic=1,623.88), followed by onycholysis-subungual hyperkeratosis (1,607.50), and subungual hyperkeratosis-oil spots (985.76). A spatial relationship was observed between onycholysis and oil spots, with the intra-nail location of onycholysis being more distal compared to the nearest oil spots. A distribution pattern of nail psoriasis was also demonstrated, where nail matrix lesions were primarily located at the center of the nail, and nail bed lesions were predominantly located near the lateral nail folds. Conclusion This study represents a pioneering analysis of the intra-nail location of nail psoriasis lesions, revealing substantial associations and spatial relationships between different lesions.

Background: Despite various therapeutic modalities for keloids have been introduced; however, their therapeutic effects are limited. Therefore, the development of a new approach for inhibiting collagen production by scar fibroblasts is needed. Objective: To investigate the effect of electrical stimulation using a low-frequency and low-intensity alternating current on collagen and MMP-1 levels in human dermal fibroblasts. Methods: Low-frequency (20 kHz) and low-intensity (1 V/cm) electrical stimulations were applied to primary dermal fibroblasts. The production of type I procollagen and expression of matrix metalloproteinase-1 were evaluated. Transcriptomic analyses were conducted to explore the possible modes of action of electrical stimulation. Results: Electrical stimulation effectively suppressed type I procollagen production and increased MMP-1 expression. In addition, transcriptomic analyses revealed that electrical stimulation altered the gene expression associated with membrane permeability and the structure of cellular membranes. Validation using real-time polymerase chain reaction revealed that electrical stimulation significantly altered the expression of mechanosensitive ion channels (PIEZO2) and membrane-bound protein organizing caveolae (CAVIN2). Conclusion Electrical stimulation using low-frequency and low-intensity alternating currents effectively modulates extracellular matrix homeostasis by altering the cellular membrane structure and function. Our findings suggest a promising therapeutic approach for the management of keloids and hypertrophic scars.

Background: Infantile hemangioma is the most prevalent benign vascular tumor in children, with propranolol being the first line systemic treatment. However, the efficacy of low dose propranolol has not been studied yet. Objective: This study aims to explore the effectiveness of low dose propranolol in treating infantile hemangioma in Korea. Methods: This study is a single-arm, retrospective cohort study to evaluating the efficacy of low dose propranolol (1 mg/kg/d) in treating infantile hemangioma. We collected data of patient’s demographics, lesion characteristics, duration and dosage of propranolol use, residual scar, and other treatments used. We evaluate treatment response of infantile hemangioma based on changes in the size of the lesion. Initially, patients were prescribed propranolol at 1 mg/kg/d and monitored on a monthly basis. In cases where the dermatologist deemed the treatment response was clinically insufficient, the dosage was increased to 2 mg/kg/d. Results: We analyzed 68 patients diagnosed with infantile hemangioma. A total of 86.76% of the patients (59/68) were exclusively treated with propranolol at 1 mg/kg/d, resulting in complete regression in 38.98% and partial regression in 61.02%. A total of 13.24% of patients (9/68) had their dosage increased to 2 mg/kg/d due to insufficient effectiveness, which led to improved conditions in nearly 90% of these patients. Conclusion Low dose propranolol (1 mg/kg) is effective in treating infantile hemangioma. Low dose propranolol is recommended to be used in combination with other treatments or for patients at high risk of propranolol adverse effects.

Lipohypertrophy refers to the phenomenon of subcutaneous fatty tissue becoming either softer or firmer than normal so that it becomes thickened. The presence of lipohypertrophy is associated with not rotating injection sites correctly, injecting into the same sites repeatedly, using smaller injection zones, and reusing needles. Injecting into lipohypertrophy sites can cause unexplained hypoglycemia because insulin absorption is delayed or erratic, thus potentially worsening glucose levels and even diabetes management. Therefore, developing a lipohypertrophy checklist for patients who inject insulin is necessary to detect lipohypertrophy as soon as possible in order to avoid repeatedly injecting into lipohypertrophy sites. A lipohypertrophy checklist will help patients maintain stable glucose levels by minimizing the risk of glycemic variability.
Absorption ; Adipose Tissue ; Checklist* ; Glucose ; Humans ; Hypoglycemia ; Insulin* ; Needles