[Clinical and Neuroimaging Analysis of 24 Cases of Sturge-Weber Syndrome].

OBJECTIVE: To analyze the clinical manifestations and neuroimaging characteristics of Sturge-Weber syndrome (SWS), to describe the manifestations of facial port-wine stains (PWS) of SWS, and to explore the screening opinions for SWS. METHODS: A retrospective analysis was performed on the general condition, clinical manifestations, and neuroimaging results of 24 SWS patients from the dermatology department of West China Hospital of Sichuan University between 2017 and 2019. Three different facial PWS distribution methods (traditional anatomical distribution, facial trigeminal nerve distribution, and facial embryological vasculature distribution) in SWS patients were Analysed. RESULTS: Among the 24 patients, 50% were male and 50% were female, with an average age of (18.9±14.0) years (range 1 to 54 years old). 12 cases were SWS type Ⅰ, and the other 12 cases were type Ⅱ. All patients had facial PWS at birth, and the facial PWS of 13 cases (54.2%) were thickened. According to the anatomical division, all the PWS involved the upper and middle face (above the oral commissure); according to the trigeminal nerve distribution, 100% (24/24) patients involve the V2 area; according to the distribution of facial embryological vasculature, 95.8% (23/24) of the patients involved frontal region. 22 patients had ophthalmic abnormalities, the most common was glaucoma (70.8%), and 4 patients had a history of epilepsy. The typical neuroimaging presentations of SWS include leptomeningeal enhancement, cortical calcification, enlarged choroid plexus, focal cerebral atrophy, abnormal intracranial vessels, and local thickening of the skull. CONCLUSION: Early intervention is recommended for facial PWS in patients with SWS , and ophthalmological screening should be performed on children with PWS found in any part of the upper and middle face after birth. Moreover, neuroimaging examination (MRI) for patients with high suspicion of SWS should be performed after 1 year old, and regular ophthalmological examination and intraocular pressure measurement is necessary.

From pathogenesis of acne vulgaris to anti-acne agents.

Acne vulgaris is a cutaneous chronic inflammatory disorder with complex pathogenesis. Four factors play vital roles in acne pathophysiology: hyperseborrhea and dysseborrhea, altered keratinization of the pilosebaceous duct, Cutibacterium acnes (C. acnes) and inflammation. The main hormones responsible for the development of acne vulgaris include androgens, insulin and insulin-like growth factor-1. Other factors involved in this process are corticotropin-releasing hormone, α-melanocyte-stimulating hormone and substance P. Wnt/ß-catenin signaling pathway, phosphoinositide 3-kinase (PI3K)/Akt pathway, mitogen-activated protein kinase pathway, adenosine 5'-monophosphate-activated protein kinase pathway and nuclear factor kappa B pathway participate in the modulation of sebocyte, keratinocyte and inflammatory cell (e.g. lymphocytes, monocytes, macrophages, neutrophils) activity. Among all the triggers and pathways mentioned above, IGF-1-induced PI3K/Akt/Forkhead box protein O1/mammalian target of rapamycin (mTOR) C1 pathway is the most important signaling responsible for acne pathogenesis. Commonly used anti-acne agents include retinoids, benzoyl peroxide, antibiotics and hormonal agents (e.g. spironolactone, combination oral contraceptive and flutamide). New approaches including peroxisome proliferator-activated receptor γ modifier, melanocortin receptor antagonists, epigallocatechin-3-gallate, metformin, olumacostat glasaretil, stearoyl-CoA desaturase inhibitor omiganan pentahydrochloride, KDPT, afamelanotide, apremilast and biologics have been developed as promising treatments for acne vulgaris. Although these anti-acne agents have various pharmacological effects against the diverse pathogenesis of acne, all of them have a synergistic mode of action, the attenuation of Akt/mTORC1 signaling and enhancement of p53 signal transduction. In addition to drug therapy, diet with no hyperglycemic carbohydrates, no milk and dairy products is also beneficial for treatment of acne.