Generalized type II minocycline-induced pigmentation: A case report.

Minocycline-induced pigmentation is a rare dermatological condition that primarily affects the skin and thyroid gland, oral mucosa, nails, teeth, bones, and sclera leading to grayish-blue pigmentation in these areas. Early identification, discontinuation of the drug, and laser treatment are crucial in managing this condition. We reported a case involving a 72-year-old Chinese woman who developed diffuse blue-brown pigmentation after 1 year of minocycline treatment for pemphigus vulgaris.

Acquired perforating dermatosis: A clinicopathologic study, and the features of dermoscopy and reflective confocal microscopy of 37 cases.

Background: Acquired perforating dermatosis (APD) is a rare skin condition characterized by degenerated materials eliminated from the dermis. Several retrospective studies on APD have been reported; however, few data are available on Chinese APD and their features on dermoscopy and reflective confocal microscope (RCM) assays.

Objective: The aim of this study was to retrospectively evaluate the clinical and histopathologic data of 37 acquired perforating dermatosis cases, and assess their features on dermoscopy and RCM.

Acquired Perforating Dermatosis Induced by PD-1 Inhibitor: A Case Report.

Acquired perforating dermatoses (APDs) are a group of diverse skin disorders in patients with systemic disease, most commonly chronic renal failure and diabetes mellitus. APD induced by medication has seldom been reported. Anti-PD-1 monoclonal antibody has recently been used as a broad-spectrum, effective, durable, and relatively safe antitumor therapy for various malignancies.

The Msi1-mTOR pathway drives the pathogenesis of mammary and extramammary Paget's disease.

Mammary and extramammary Paget's Diseases (PD) are a malignant skin cancer characterized by the appearance of Paget cells. Although easily diagnosed, its pathogenesis remains unknown. Here, single-cell RNA-sequencing identified distinct cellular states, novel biomarkers, and signaling pathways - including mTOR, associated with extramammary PD.

Congenital Blaschkoid Angiolymphoid Hyperplasia With Eosinophilia of the Anogenital Region.

Angiolymphoid hyperplasia with eosinophilia (ALHE) is an uncommon, idiopathic vascular disorder. It manifests as dermal or subcutaneous red to brown papules or nodules, most commonly on the head and neck; other less common sites include the trunk, extremities, genitalia, lips, and oral mucosa. Although ALHE is a benign disease, lesions are often persistent and difficult to eradicate.

Reduced Expression of RECK Protein May Help Differentiate Cutaneous Malignant Melanoma from Melanocytic Nevus.

Background: Differentiating between vertical growth cutaneous malignant melanoma (CMM) and predominantly intradermal benign melanocytic nevus (BMN) can be extremely challenging. Reversion-inducing cysteine-rich protein with Kazal motifs (RECK) is an endogenous inhibitor of many proteins that promote tumor invasion and progression. We investigated the difference in expression of RECK between CMM and BMN to determine whether RECK could assist in their differentiation.

Panfolliculoma and histopathologic variants: a study of 19 cases.

Panfolliculoma (PF) is an uncommon benign follicular neoplasm exhibiting differentiation toward all components of a hair follicle. Several pathologic manifestations have been described in a limited number of cases. We studied 19 cases of PF to summarize the clinical parameters and to classify this unique neoplasm histopathologically.

Exenatide-induced eosinophilic sclerosing lipogranuloma at the injection site.

Sclerosing lipogranuloma is a granulomatous reaction to the injection of a high-viscosity fluid in the tissues for the cosmetic purpose of improving body contour; lesions on the extremities and buttocks are commonly the results of injections of therapeutic agents in oily vehicles. Exenatide, once-weekly injection, is a therapeutic method for patients with type 2 diabetes. Here, we describe a case of exenatide once weekly induced eosinophilic sclerosing lipogranuloma at the injection site of a 62-year-old patient.

Expression of glycoprotein non-metastatic melanoma protein B in cutaneous malignant and benign lesions: a tissue microarray study.

Background: Glycoprotein non-metastatic melanoma protein B (GPNMB) plays an important role in the pathogenesis of inflammatory and malignant diseases. We investigated the expression of GPNMB in benign and malignant skin diseases.

Methods: Tissue microarray was performed in the skin tissues of 102 cases including malignant melanoma (MM), squamous cell carcinoma (SCC), basal cell carcinoma (BCC), and benign dermatosis.

Kanglaite attenuates UVB-induced down-regulation of aquaporin-3 in cultured human skin keratinocytes.

Ultraviolet (UV) radiation plays an important role in the pathogenesis of skin photoaging. Depending on the wavelength of UV, the epidermis is affected primarily by UVB. One major characteristic of photoaging is the dehydration of the skin.

Expression of survivin and human telomerase reverse transcriptase in extramammary Paget's disease.

Background: Extramammary Paget's disease (EMPD) is a rare neoplasm of apocrine gland-bearing skin. It is known that over-expression of survivin and human telomerase reverse transcriptase (hTERT) correlates with malignancies. We investigated the expression of hTERT and survivin by Paget's cells and their role in the tissue invasion and recurrence of EMPD.

Treatment of palmoplantar pustulosis with arotinoid ethylester.

Palmoplantar pustulosis (PPP) is a chronic recurring and refractory pustular dermatosis. To investigate the efficacy and safety of arotinoid ethylester in patients with PPP, sixteen adult subjects with PPP, who had taken no systemic medications for three months, were enrolled. All the subjects received 0.