Dermatoscopic profiling of inverted follicular keratosis in different skin phenotypes.

BACKGROUND: Inverted follicular keratosis (IFK) is a rare benign tumour of the follicular infundibulum. Owing to its similarity to other benign and malignant cutaneous lesions, it poses a diagnostic challenge. There is limited information on the dermatoscopic characteristics of IFK and the majority of cases have been reported in patients with lighter skin types. OBJECTIVES: To describe the prevalent dermatoscopic features of IFK, especially in patients with skin of colour. METHODS: We retrospectively analysed 35 histopathologically verified cases of IFK from a single university hospital in Turkey. RESULTS: With respect to the Fitzpatrick skin phototype, 2 (6%), 12 (34%), 16 (46%) and 5 (14%) patients had Fitzpatrick skin phototypes II, III, IV and V, respectively. Clinically, the majority of IFKs were hypopigmented or nonpigmented (83%). Pink-white structureless areas (54%), ulceration (54%), a central keratin mass (43%) and blood spots on keratin mass (43%) were the most frequent dermatoscopic findings. Pigmented structures were observed as blue-grey structureless areas in 12 lesions and as blue-grey clods in 5, primarily in Fitzpatrick phototype IV and V skin. The incidence of a pink, structureless area and blood spots on ulceration was found to be statistically significantly higher in individuals with fairer skin types, while a greater prevalence of blue-grey coloration was observed in those with skin of colour (P < 0.05). CONCLUSIONS: Although our study found some distinguishing dermatoscopic findings in IFK, diagnosis is generally confirmed by histopathology, as the clinical appearance and dermatoscopic findings may not be sufficient to differentiate it from other tumours, especially squamous cell carcinoma or keratoacanthoma. The dermatoscopic characteristics of dark skin are comparable to those of pale skin; however, hyperpigmentation can be more noticeable in skin of colour.

Evaluation of relationship between antihypertensive drug usage and dermatoscopic features in patients with keratinizing skin cancer.

Keratinizing skin cancers including actinic keratoses (AK), in situ squamous cell carcinoma/Bowen's disease/intraepidermal carcinoma (IEC), invasive cutaneous squamous cell carcinoma (cSCC) and keratoacanthoma share similar dermatoscopic features and also reveal different patterns that assist in their diagnosis. Recently epidemiological studies reveal the association between antihypertensive drugs and skin cancer risk, especially cSCC. This study aims to determine the dermatoscopic features of keratinizing skin cancer in patients using antihypertensive drug and compare with non-users. A total of 46 patients with 64 keratinizing skin cancer lesions were included in the study. The demographic, clinical characteristic of patients, the number, duration, localization and dermatoscopic features from each lesion were collected. First, we evaluated the dermatoscopic features according to the histopathologic diagnosis. Then, all patients were divided into two groups as users of antihypertensive drugs and non-users. The dermatoscopic features were compared in terms of antihypertensive drug usage and histopathologic diagnosis in antihypertensive drug users and non-users, separately. The users of anti-hypertensive drugs were 22 (47,8%) and non-users 24 (52,2%). Of the total 64 lesions including 47 AK, 5 IEC, 10 cSCC, and 2 keratoacanthoma were evaluated. White structureless area was found statistically significant in cSCC lesions of patients using antihypertensive drugs (P = .004). This finding in cSCC may be a clue for antihypertensive drug usage and these drugs may be a predisposan factor for dermal fibrosis. Regardless of histopathology, dermatoscopic features show no statistically difference between antihypertensive drug users and non-users (P > .05). Clearer results can be obtained by conducting more detailed and long-term studies.

Targeted tumour therapy induced papulopustular rash and other dermatologic side effects: a retrospective study.

Background: Papulopustular rash is the most common cutaneous adverse effect during targeted tumour therapy particularly with epidermal growth factor receptor inhibitors (EGFRIs). Objective: To evaluate the adverse skin reactions, mainly papulopustular rash, caused by targeted tumour therapy. Materials and methods: We retrospectively analysed the data of patients who were diagnosed papulopustular rash due to targeted chemotherapeutic agents between January 2016 and August 2018. Demographic characteristics of the patients, the type of malignancy, chemotherapeutic agents causing papulopustular rash, clinical features and grade of the rash, treatment modalities used for the rash, other associated cutaneous adverse reactions, and the need for dose-modification or discontinuation of the chemotherapy were recorded. Results: A total of 39 patients (26 males, 13 females) with a median age of 60 (range 32-86) years were included in the study. EGFRIs such as erlotinib, lapatinib, cetuximab, and panitumumab were the main drugs causing papulopustular rash in 2 (5.1%), 3 (7.6%), 18 (46.1%), and 13 (33.3%) patients, respectively. Imatinib, bevacizumab in combination with oxaliplatin, and everolimus in combination with exemestane and goserelin were responsible in three patients. The most commonly affected area was the face (87.1%) followed by the trunk (56.4%), scalp (25.6%), and extremities (23%). The rash was recorded as grade 1, 2, and 3 in 18, 13, and 6 of the patients, respectively. Grade 3 rash was lead to dose interruptions in 5 (12.8%) patients with subsequent reintroduction at a lower dose in 4 (10.2%) of them and discontinuation of the therapy in 1 (2.5%) patient. Pruritus, xerosis, paronychia, increased growth of the eyelashes, mucositis, hand-foot syndrome (HSF), and symmetrical drug-related intertriginous and flexural exanthema (SDRIFE) are other skin toxicities associated with the targeted tumour therapy. Conclusions: With the increasing use of targeted therapies, dermatologists are now confronted with extensive spectrum of skin toxicities. Therefore, it is critical for dermatologists to be aware of these toxicities so as to develop the best approach without discontinuation of cancer therapy.

Molluscum contagiosum with dermoscopic features in an unusual areola and nipple location.

Molluscum contagiosum is a common, contagious viral skin disease that often affects children and adolescents. Involvement of the areola and nipple are rarely reported. Herein we report two young women with molluscum contagiosum on the areola-nipple complex and we discuss the dermoscopic features of the lesions at this unusual site.

Vitamin D Levels in Children During Winter and the Relationship Between Sunscreen and Sun Protection Behaviors.

INTRODUCTION: Sunlight is the major source of vitamin D, thus, the use of sunscreens could result in vitamin D insufficiency or deficiency. OBJECTIVES: Our study aimed to assess serum vitamin D levels in healthy children aged 0-18 years in the winter season and determine the association between sunscreen use and sun protection behaviors on vitamin D status. METHODS: The demographic data, clothing style, skin type, history of sunburn, history of visiting seaside towns in summer, sun protection behaviors including sunscreen use, wearing sunglasses and hats, and further detailed information about sunscreen use were recorded. Vitamin D status was assessed by measuring blood levels of total 25(OH)D during winter. RESULTS: Three hundred seventy-six children (172 boys and 204 girls) with a mean age of 128.38±56.39 months were enrolled. The mean serum level of 25(OH)D was 15.32±8.64 ng/mL. The mean values of vitamin D were associated with age, sex, traditional clothing style, having a sunburn history, and sunscreen use (P < 0.05). Adolescents and girls had vitamin D deficiency and inadequacy more than younger children and boys (P < 0.05). Sunscreen use in the adequacy group was lower than in the inadequacy and deficiency groups (P = 0.001). There was no significant difference between vitamin D status according to the sunscreen details (sun protection factor, product source, season, and body areas) (P > 0.05). CONCLUSIONS: Sunscreen use appears to reduce vitamin D levels measured in winter. Children, especially girls and adolescents, should be exposed to sufficient sunlight to maintain normal serum vitamin D levels. Vitamin D supplementation should be given to children, especially during winter.

An overlooked burden of acne in adolescents: the psychosocial well-being of their families.

INTRODUCTION: Acne vulgaris is significantly associated with an increased burden of care and has an important impact on the quality of life (QoL) and self-esteem of affected individuals. We aimed to assess the QoL of adolescents with acne and their families as well as the association of QoL with acne severity, treatment response, duration of acne and localization of lesions. MATERIAL AND METHODS: The sample included a total of 100 adolescents with acne vulgaris, 100 healthy controls and their parents. We collected data on sociodemographic characteristics, presentation of acne, duration of acne, treatment history, treatment response, and parental sex. We used the Global Acne Severity scale, Children's Dermatology Life Quality Index (CDLQI), and the Family Dermatology Life Quality Index (FDLQI). RESULTS: In the group of patients with acne, the mean CDLQI score in the patients was 7.89 (SD, 5.43) and the mean FDLQI score in the parents was 6.01 (SD, 6.11). In the control group, the mean CDLQI score in healthy controls was 3.92 (SD, 3.88) and the mean FDLQI score in their family members was 2.12 (SD, 2.91). We found a statistically significant difference between the acne and control groups in CDLQI and FDLQI scores (P < .001). There were also statistically significant differences in the CDLQI score based on the duration of acne and the response to treatment. CONCLUSIONS: Patients with acne and their parents had a decreased QoL compared with healthy controls. Acne was associated with impaired QoL in family members. Assessing QoL in the family in addition to that of the patient may allow an improved management of acne vulgaris.

Evaluation of Diagnostic Accuracy and Therapeutic Approach of Dermatologists and Plastic Surgeons To Non-Melanocytic Skin Lesions By Using Telemedicine.

Introduction: In the new circumstances of coronavirus disease 2019 pandemic, tele-dermatology and tele-dermoscopy have become more important in daily practice for departments for which visuality is at the forefront as dermatology and plastic and reconstructive surgery. Objectives: This study was aimed to determine diagnostic accuracy and treatment approaches of non-melanocytic skin lesions between 2 clinics by store and forward tele-dermatology method and to evaluate the contribution of tele-dermoscopy to the diagnostic accuracy for dermatologists. Methods: A total of 26 patients with non-melanocytic skin lesions were included in the study. Clinical images of the lesions were sent by email to 3 plastic surgeons and 3 dermatologists. The accuracy of the diagnoses was evaluated by comparing tele-dermatology with histopathology. Diagnosis and treatment approaches were recorded for both clinics. Dermatologists also defined their diagnosis with tele-dermoscopic images. Results: The mean percentage of diagnostic accuracy among dermatologists was 74.3% and among plastic surgeons was 61.5%. There was no significant difference in diagnostic accuracy between departments (P = 0.625). There was a statistically significant difference between the departments for diagnostic and treatment approaches (P values respectively P = 0.002, P < 0.001). Plastic surgeons preferred to confirm their pre-diagnosis histopathologically more than dermatologists. Plastic surgeons recommended surgical procedures for 25 lesions (96.2%) while dermatologists for 14 (53.8%) ones. Tele-dermoscopy increased the rate of diagnostic accuracy of dermatologists from 74.3% to 82.0% (P = 0.02). Conclusions: Tele-dermatology is an effective method for non-melanocytic skin lesions with high diagnostic accuracy. Adding dermoscopy to tele-dermatology increases diagnostic accuracy of dermatologists on non-melanocytic skin lesions.

Subungual Glomangiomyoma.

Glomus tumors are relatively rare benign tumors originated from normal glomus bodies. These tumors make up approximately 2% of all hand tumors and are most commonly found in the nail matrix and proximal nail bed of the hands. Histopathologically, they are classified into solid glomus tumor, glomangioma, and the least common type glomangiomyoma. Here we report an unusual case of subungual glomangiomyoma of the toe with dermatoscopic and histopathologic findings.

The effects of sebum configuration on Demodex spp. density.

BACKGROUND/AIM: Demodex spp. are ectoparasites living in the pilosebaceous units, which feed on the host's sebum and cellular proteins. The protective barrier of the skin consists of sebum secretion, moisture, and the acid mantle. In this study, we aimed to determine the effects of skin sebum, moisture, pH levels, and sebum configuration on Demodex spp. density. MATERIALS AND METHODS: Forty-five patients who had demodicosis were enrolled in the study group, while the control group consisted of 40 subjects without demodicosis. Body fat percentage, serum triglyceride and cholesterol levels, skin sebum, moisture, and pH levels were measured. Demodex spp. density was determined with a standardized skin surface biopsy. Sebum samples were taken from the forehead and a high-performance thin-layer chromatography (HPTLC) method was performed on these samples. Subsequently, densitometric analyses were applied to the HPTLC plates. RESULTS: Demodex spp. were found on the cheeks and lived in an alkali environment. Skin sebum and moisture levels were low in all groups. The skin pH levels and cholesterol ester in the sebum configuration were determined to be significantly higher in the group with demodicosis. CONCLUSION: We suggest that Demodex spp. may use cholesterol ester in the sebum as nutriment. In other words, cholesterol ester may be a suitable growth medium for the proliferation of Demodex spp.