Background Over the past decades, soft‐tissue filler injections have become an essential part of cosmetic practice worldwide. Due to the increasing demand, unlicensed practitioners venture in performing this minimally invasive procedure, injecting illegal fillers that pose serious complications. Objectives To compare the adverse effects of legal and illegal soft‐tissue fillers injected by licensed and unlicensed practitioners. Materials and methods A 10‐year retrospective, descriptive, single‐center study conducted at the outpatient dermatology department and skin laser center at Siriraj Hospital from January 2009 to December 2019. Patients were identified as having treatment‐related complications. Their demographic data, clinical history, and injection history were reviewed. Results Forty patients with mean age of 37 years old were included in the study. Thirty‐five of them (87.5%) were female. Illegal soft‐tissue fillers were used in 28 patients (70%) and were performed by unlicensed practitioners (18 cases, 64.3%, P = .001). Adverse effects from illegal fillers (26 cases, 92.9%) developed longer than legal fillers (7 cases, 58.3%) (P = .017). Symptoms significantly lasted longer in patients injected with illegal fillers, 10 (0.07‐288) weeks, as compared to patients injected with legal fillers 0.75 (0.14‐72) weeks (P = .01). Injections from illegal fillers resulted to foreign body reaction (22 cases, 78.6%) and infections (6 cases, 21.4%). Vascular complications were identified in legal fillers injections (5 cases, 41.7%). Conclusions The incidence of adverse effects and complications from soft‐tissue filler injections are superior when performed by novice injectors and unlicensed practitioners using illegal fillers. Proper training of filler injections, selection of appropriate fillers, and early recognition of adverse effects are critically important to the success of treatments.

About half of onychomycosis patients, especially elderly males, could not recognize the disease by themselves. It is important for physicians to educate patients with risk factors for onychomycosis to recognize this condition early to prevent concomitant infection and complications, and to improve patients' well-being.

Background: Basal cell carcinoma (BCC) is the most common skin cancer with globally increasing incidence. To date, the information regarding BCC in Thailand is limited.Objective: To evaluate the demographic, clinical, histopathological trends of BCC and other contributing factors.Methods: We retrospectively reviewed the demographic, clinical and histological data of all BCC outpatients from January 2009 to December 2018.Results: From 278 BCC patients recruited to this study, most of them (71.6%) were older than 60 years old. The most common histological subtype was nodular BCC (63.3%). A statistically significant association was observed between histological variant and location of the tumor; H and M area were associated with nodular BCC, L area was related to superficial subtype (p-value < 0.001). Misdiagnosis of BCC was observed in 53 cases, mostly as melanocytic nevus (30.2%), and about quarter (26.4%) was made by board-certified dermatologists.Conclusions: Nodular BCC is significantly associated with H and M area, while superficial subtype is related to L location. Quarter of the patients already have large tumors at their first presentation. Misdiagnosis of BCC is not uncommon.