Prevalence of exercise-induced oxygen desaturation after recovery from SARS-CoV-2 pneumonia and use of lung ultrasound to predict need for pulmonary rehabilitation.

BACKGROUND: Persistence of breathlessness after recovery from SARS-CoV-2 pneumonia is frequent. Recovery from acute respiratory failure (ARF) is usually determined by normalized arterial blood gases (ABGs), but the prevalence of persistent exercise-induced desaturation (EID) and dyspnea is still unknown. METHODS: We investigated the prevalence of EID in 70 patients with normal arterial oxygen at rest after recovery from ARF due to COVID-19 pneumonia. Patients underwent a 6-min walking test (6MWT) before discharge from hospital. We recorded dyspnea score and heart rate during 6MWT. We also investigated the possible role of lung ultrasound (LU) in predicting EID. Patients underwent a LU scan and scores for each explored area were summed to give a total LU score. RESULTS: In 30 patients (43%), oxygen desaturation was >4% during 6MWT. These patients had significantly higher dyspnea and heart rate compared to non-desaturators. LU score >8.5 was significantly able to discriminate patients with EID. CONCLUSION: In SARS-CoV-2 pneumonia, ABGs at discharge cannot predict the persistence of EID, which is frequent. LU may be useful to identify patients at risk who could benefit from a rehabilitation program.

Use of bioactive materials and limited FOV CBCT in the treatment of a replanted permanent tooth affected by inflammatory external root resorption: a case report.

BACKGROUND: Inflammatory external root resorption is one of the possible complications of replantation of an avulsed tooth. Several studies have shown that limited FOV CBCT is an efficient diagnostic support and in treatment planning of these cases in paediatric patients because of its high resolution combined with low radiation doses. The recent literature has suggested that Biodentine is an effective material for resolution of inflammatory root resorption. CASE REPORT: This article describes the successful therapy of a replanted tooth affected by inflammatory root resorption. In the present case, a CBCT exam was performed to detect the extent of the damage, and the canal was filled with Biodentine in the apical third. At present, the threated tooth is asymptomatic, and the twelve months follow-up examination showed healing of periradicular hard tissues.

Lymphogranuloma venereum: an old, forgotten re-emerging systemic disease.

Lymphogranuloma venereum (LGV) is a sexually transmitted infection endemic in parts of Africa, Asia, South America, and the Caribbean, but once was rarely observed in Western countries, where most cases were considered to be imported. However, recent outbreaks have been reported in Europe, Australia, New Zealand, the United States and Canada, mainly among HIV positive men who have sex with men, signaling LGV re-emergence. The etiological agent of LGV is Chlamydia trachomatis serotypes L1, L2 and L3, and current outbreaks are mostly sustained by L2b type. The clinical course can be classically divided into three stages: an initial papule, which may ulcerate at the site of inoculation, followed by regional lymphoadenopathy (second stage, generally unilateral). In the tertiary stage, lymphatic obstruction, with elephantiasis of genitalia, and rectal involvement can lead to the formation of strictures and fistulae that may require surgical treatment. Recent cases are observed mainly among HIV positive people, often co-infected with HCV and others STIs, engaging in high-risk sexual practices. The main clinical picture is a relative new entity characterized by progressive ulcerative proctitis, the so called anorectal syndrome. Diagnosis is often delayed, requires a high index of clinical suspicion and must rely on the use of nucleic acid amplification tests. The differential diagnosis of proctitis should include LGV infection. Gastroenterologists, coloproctologists, dermatologists and other specialists need to be aware of LGV proctitis to avoid diagnostic delay and progression of disease to the tertiary stage.

Linkage disequilibrium of three polymorphic RFLP markers in the apolipoprotein AI-CIII gene cluster on chromosome 11.

We analysed the allelic and genotypic frequencies of three restriction fragment length polymorphisms in the region of chromosome 11 encoding apolipoprotein AI and CIII genes in a free-living population from South Italy (Calabria). These markers are located at -2500 and -78 bp from the transcription start site of apolipoprotein AI gene (XmnI and MspI, respectively), and in the 3' untranslated region of apolipoprotein CIII gene (SstI). XmnI and SstI label rare alleles (X2 and S2 indicate the presence of the site), whereas the absence of the MspI site (because of a G to A transition) marks the rare allele, M2. Pairwise linkage disequilibrium analysis was determined. Two significant non-random associations were found: a positive disequilibrium between ApoA1/XmnI and ApoA1/MspI markers (P < 0.0001), and a negative disequilibrium between ApoA1/XmnI and ApoC3/SstI markers (P < 0.05). Statistical analysis showed a significant difference in the S2-M2 haplotype frequency between the group of subjects with serum cholesterol levels in the highest decile (P < 0.005) and the group with serum cholesterol levels below the highest decile. The allelic frequency for each locus showed no significant difference between the two groups for all other metabolic parameters, included total cholesterol serum levels. These haplotypes are a more precise measure of genetic variations in the apolipoprotein cluster and their use should allow the mapping of mutations responsible for high serum cholesterol levels.

[Angiodysplasia of the colon]. / Le angiodisplasie del colon.

Ascending colon angiodysplasia is a cause of colorrhagia, particularly if the patients are more than 55 years old. Therapy is primarily surgical and it consists generally in right hemicolectomy. Two cases personally observed are reported and a survey of the literature is made.