Search results for "Canth"

Oral pigmented lesions: clinicopathologic features and review of the literature

2012

Diagnosis of pigmented lesions of the oral cavity and perioral tissues is challenging. Even though epidemiology may be of some help in orientating the clinician and even though some lesions may confidently be diagnosed on clinical grounds alone, the definitive diagnosis usually requires histopathologic evaluation. Oral pigmentation can be physiological or pathological, and exogenous or endogenous. Color, location, distribution, and duration as well as drugs use, family history, and change in pattern are important for the differential diagnosis. Dark or black pigmented lesions can be focal, multifocal or diffuse macules, including entities such as racial pigmentation, melanotic macule, melan…

Cerebriform sebaceous nevus: a subtype of organoid nevus due to specific postzygotic FGFR2 mutations.

2021

Background Postzygotic mutations in FGFR2 have been identified in mosaic forms of acne, keratinocytic epidermal nevi, nevoid acanthosis nigricans / rounded and velvety epidermal nevus and in two fetuses with papillomatous pedunculated sebaceous nevus (PPSN). Objectives To determine the clinical and genetic characteristics of children with cerebriform, papillomatous, and pedunculated variants of sebaceous nevi. Methods Infants diagnosed with sebaceous nevi characterized by a cerebriform, papillomatous, and/or pedunculated morphology over a 10-year period (2010 - 2019) at three pediatric dermatology centers in Switzerland and France were included in this case series. Clinical and histological…

Expanded forehead (Fricke) flap for large defect of lateral canthal area

1993

The use of an expanded forehead (Fricke) flap to repair large full thickness defects of the lateral canthus and/or of the upper eyelid is presented. The reconstruction is performed in two stages. In the first stage, a rectangular, 25 ml tissue expander (6 cm in width and 2 cm in length) is inserted under the skin lateral to and above the eyebrow; expansion is completed in about three weeks. At the second stage, the lesion is excised, and the laterally based expanded flap is elevated. Using the expanded Fricke flap, thinner, abundant skin is obtained, and the donor site is directly closed, without grafting and without distorting the eyebrow. If there is a shortage of conjunctiva, this can be…

Locking Y Lateral Canthopexy as a Treatment for Dry Eye Disease Caused by Eyelid Malposition

2020

PURPOSE The signs and symptoms of dry eye disease (DED) can affect the quality of life of patients. This study analyzes whether locking Y lateral canthopexy improves patients' quality of life and in what way it does so (based on the ocular surface disease index questionnaire) and DED signs (measured by the fluorescein breakup time, tear osmolarity, Schirmer test, and corneal staining) in patients with DED caused by a eyelid malposition or impaired blink dynamics. METHODS This was a case-control study. Forty eyes of 20 patients with DED and lateral canthal disinsertion examined at the University Hospital La Ribera during a 1-year period from November 2016 to November 2017. The 40 eyes were d…

Oral melanoacanthoma and oral melanotic macule: a report of 8 cases, review of the literature, and immunohistochemical analysis.

2007

Oral melanoacanthoma (MA) is a rare, benign pigmented lesion, similar to cutaneous MA, characterized by hyperplasia of spinous keratinocytes and dendritic melanocytes. The pathogenesis of oral MA remains uncertain, although its clinical behavior is suggestive of a reactive origin. The most common intraoral sites are the buccal mucosa, lip, palate and gingiva. The average age of presentation is 28 years, mainly in blacks, with a strong female predilection. The oral melanotic macule (MM) is a small, well-circumscribed brown-to-black macule that occurs on the lips and mucous membranes. The etiology is not clear and it may represent a physiologic or reactive process. The average age of presenta…

Patterns of trunk spine growth in two congeneric species of acanthocephalan: investment in attachment may differ between sexes and species.

2012

SUMMARYAcanthocephalans have evolved a hooked proboscis and some taxa have trunk spines to attach to their definitive hosts. These structures are generated before being used, thus a key question is how investment in attachment could optimally be allocated through the ontogeny. The number and arrangement of hooks and spines are never modified in the definitive host, but it is unclear whether these structures grow during adult development. A comparison of the size of trunk spines between cystacanths and adults of Corynosoma cetaceum and C. australe indicated that spines grow in both species, but only in females, which also had significantly larger spines than males. This sexual dimorphism did…

Analytical pyrolysis of wood and non-wood materials from integrated biorefinery concepts

2019

Wood and non-wood differ with respect to their anatomical, physical, and chemical properties, even among their species, resulting in different behaviors during thermal conversion. Hence, understanding the degradation of these feedstocks by pyrolysis is attractive to establish biorefinery possibilities for renewable resources. Additionally, biomass pretreatment technology plays an important role in many biorefinery processes. Therefore, an approach that integrates such pretreatment with pyrolysis offers an attractive, novel method for improving the end-product spectrum (e.g., enriched either with aliphatic or aromatic constituents). Furthermore, a rapid analytical method for biomass feedstoc…

La licantropía y el efialtes en la literatura médica griega: los testimonios de Areteo, Galeno, Posidonio y Aecio de Amida, Oribasio y Actuario (más …

2018

Textos médicos de las épocas imperial y bizantina nos proporcionan alguna información sobre las patologías de la licantropía y el llamado efialtes, que son tratadas correlativamente y que presentan algunas características comunes a ambas, si bien es la primera la que recibe mayor atención. El presente trabajo comprende brevemente los pasajes de mayor interés, acompañados de su traducción y de un somero comentario que atiende a la problemática filológica, histórica y médica. Se concluye el acierto de la medicina griega al relacionar ambas afecciones con la estabilidad psiquiátrica del paciente, exactamente como lo hace la medicina moderna, sin por ello dejar de lado el establecimiento de una…

Host-related factors affectingisopod (Asellus aquaticus) susceptibility to and interaction with an acanthocephalan (Acanthocephalus lucii) parasite

2013

Kirjoittamisen ja rakkauden paloa : Juhani Aho sekä Elisabet Järnefeltin ja Minna Canthin kirjalliset salongit

2012

Tutkimukseni käsittelee Juhani Ahoa sekä Elisabet Järnefeltin ja Minna Canthin kirjallisia salonkeja. Tutkimuksessani kirjallisella instituutiolla ja kirjallisen elämän kuvaamisella on keskeinen rooli ja teoreettisesti se pohjautuu kirjallisuussosiologiaan. Tutkimukseni kuuluu kirjoittamisen historian tutkimuksiin. Tutkimuksessa kuvaan kirjallista elämää ja siihen liittyvien keskeisten henkilöiden, kirjailija Juhani Ahon, Elisabet ja Aleksander Järnefeltin sekä kirjailija Minna Canthin välisiä suhteita ja heidän elämäänsä hyvinkin tarkasti, ulkopuolisesta näyttäen jopa hivenen juoruilunomaisesti. Tämän tutkimuksen perusteella voidaan todeta, että kirjallisuussosiologian juuret ulottuvat Suo…