Skin cancer incidence in Mexican renal transplant recipients: a cohort over 56 years.

Background: Skin cancer is a primary health concern in renal transplant recipients (RTRs). Existing research mainly stems from North America, Europe, and Australia, with limited data from Latin America.

Methods: This 56-year (1967-2023) retrospective cohort study explores skin cancer incidence in Mexican RTRs.

[Cutaneous hyperpigmentation as a manifestation in acute on chronic liver failure].

Background: The acquired cutaneous pigmentation represents a little recognized clinical manifestation in liver disorders, both acute and chronic, and can occur in the exacerbation processes of preexisting hepatopathies, as in the context of acute-on-chronic liver failure. Several hypotheses about the increase in pigment at skin and mucous membranes have been developed; some try to explain it as a defect in the degradation of melanin with secondary accumulation at tissues; others, on the other hand, describe it as a consequence of the release of fibroblast growth factors like endothelial growth factor and hepatocyte growth factor, which are produced under the stimulation of liver regeneration and cause a melanogenesis stimulation. The aim of this article is to study pigmentary skin changes in the background of liver diseases.

[Oral squamous cell carcinoma and lichen planus vs. lichenoid lesions. Case report].

Background: The development of squamous cell carcinoma from oral lichen planus is controversial. We report a case of intraoral squamous cell carcinoma, which presents together with lesions of oral lichen planus. The aim of this report was to analyze the problem to distinguish between the incipient changes of squamous cell carcinoma from the features described in oral lichen planus, in order to establish an accurate diagnosis of both entities.

Morphological clues in the diagnosis of sclerodermiform dermatitis.

In this report, we review 5 sclerodermiform cutaneous conditions: eosinophilic fasciitis, systemic nephrogenic fibrosis, scleredema, scleromyxedema, and toxic oil syndrome. We emphasize the morphological differences between the conditions and some morphological clues that are important to differential diagnosis.

In whom, how and how often is surveillance for hepatocellular carcinoma cost-effective?

Background: Despite well known worldwide differences in hepatocellular carcinoma incidence, which reflect different risk profiles, current recommendation of surveillance with ultrasound and alpha-fetoprotein twice-a-year has been restricted to cirrhotic patients. To evaluate the generalizability of this recommendation, we reviewed the clinical charts of hepatocellular carcinoma cases in a Mexican scenario. To evaluate efficiency, we performed a literature based cost-effectiveness analysis.