Nail disorders in newborns can show independently or as components of systemic illnesses or genodermatoses. The examination of these abnormalities is complex and sometimes challenging. However, familiarity with these disorders can significantly contribute to uncovering potential underlying conditions. This review includes the physiological nail changes seen within the first few months of life, such as Beau\'s lines, onychoschizia, koilonychia, congenital nail fold hypertrophy of the first digit, and onychocryptosis. This review also focuses on the most relevant congenital disorders reported and how to perform differential diagnosis. Finally, this review highlights those hereditary diseases in which nail involvement is crucial for diagnosis, such as nail-patella syndrome, congenital pachyonychia, or congenital dyskeratosis, among others.

Nail disorders in newborns can show independently or as components of systemic illnesses or genodermatoses. The examination of these abnormalities is complex and sometimes challenging. However, familiarity with these disorders can significantly contribute to uncovering potential underlying conditions. This review includes the physiological nail changes seen within the first few months of life, such as Beau\'s lines, onychoschizia, koilonychia, congenital nail fold hypertrophy of the first digit, and onychocryptosis. This review also focuses on the most relevant congenital disorders reported and how to perform differential diagnosis. Finally, this review highlights those hereditary diseases in which nail involvement is crucial for diagnosis, such as nail-patella syndrome, congenital pachyonychia, or congenital dyskeratosis, among others.

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Pemphigus vulgaris (PV) mainly causes blistering of the skin and mucous membranes, with nail unit involvement being rare. Nail involvement may serve as an indicator of disease severity. We present a case of a 20-year-old male with PV who had both cutaneous and nail findings, with nail changes corresponding with disease severity. The patient with biopsy-confirmed PV, on prednisone and mycophenolate, presented to the emergency department with an acute flare of PV and severe mandibular pain and lymphadenopathy. At follow-up in our outpatient department, the physical examination was significant for onychomadesis and onycholysis of the fingernails. Prednisone and mycophenolate dosages were increased, and rituximab infusions were initiated. Bullae and mucosal lesions resolved on the follow-up, and nail changes improved. This case appends an unusual perspective to the limited literature on PV-associated nail changes, especially in younger patients. It advocates for meticulous history taking and physical examination and supports a correlation between nail symptoms and PV disease severity.

Weyers acrofacial dysostosis (WAD) is a rare skeletal dysplasia, which is autosomal-dominant, and the clinical symptoms are presented as dental anomalies, polydactyly, nail dystrophy, and short physical stature. It is also termed \"Curry‑Hall syndrome\" and reported to be linked to genetic mutations mapped on chromosome 4p16, the region reported being commonly associated with a similar genetic syndrome, Ellis-van Creveld (EVC) syndrome. Most individuals with EVC have congenital heart abnormalities, most often atrial septal defects, unlike WAD. In this case, a 15‑year‑old girl presented with onychodystrophy and polydactyly observed in the hands and feet, microdontia, or agenesis of teeth, which were conical in shape, with a short stature. The patient had dystrophy of nails since birth, and physical growth in terms of height did not match the normal growth parameters with respect to age. The patient also had abnormal dentation with conical-shaped teeth, with the rest of the clinical presentations suggestive of WAD.

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UNASSIGNED: Cronkhite-Canada syndrome (CCS) is an extremely rare non-inherited syndrome first described in 1955 with only about 500 more cases reported so far. Since the aetiology of the disease remains unknown, there were no specific treatments in consensus. In many countries, CCS is a completely new condition that may confuse physicians at first encounter. Lessons should be learned from these cases by gastrointestinal specialists to be aware of this condition in any circumstances.
UNASSIGNED: The authors reported a case study of a 45-year-old Vietnamese male with CCS diagnosis, which encountered at our centre for the first time.
UNASSIGNED: The definitive diagnosis was provided by combining clinical characteristics, and endoscopic and histopathologic features, after excluding other causes of gastrointestinal polyposis. The patient responds to corticosteroids, proton pump inhibitors, and nutritional support right after treatment. After 1 year of treatment, his symptoms ameliorated completely although colon polyps insignificantly reduced.
UNASSIGNED: Gastroenterologists should always be aware of patients with CCS with the following symptoms: gastrointestinal hamartomatous polyps, diarrhoea, and the dermatologic triad of alopecia, hyperpigmentation, and onychodystrophy.

Onychotillomania is characterized by an irresistible urge to pick or pull at one\'s nails, resulting in significant damage to the nail and surrounding tissue. In severe cases, it can cause onychodystrophy, which leads to abnormal changes in nail shape, color, texture, and growth. Managing onychotillomania can be challenging due to the lack of standard treatment and concurrent behavioral disorders. Pharmacotherapy and behavioral therapy have shown some positive outcomes from reported cases. The treatment for onychodystrophy varies depending on the underlying cause and may entail the application of topical, systemic, or laser therapies. Nevertheless, there is currently no consensus on the most effective treatment approach. This report presents a case of onychodystrophy caused by onychotillomania successfully treated using a pulsed dye laser 595 nm. The treatment was administered four times, with a two-week interval between sessions. Significant improvement was seen within four weeks of starting the treatment, and by the end of the eight-week program, the dystrophic thumbnails had almost completely resolved. After a thorough ten-month follow-up, it has been determined that the dystrophic nails have not reappeared. Moreover, there has been a significant decrease in the patient\'s tendency to pull her nails.

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