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1. Abstract Oral squamous cell carcinoma (OSCC) represents 3% of all malignant neoplasms. Considering the observed regional occurrence of OSCC, the aim of this study was to analyze the incidence and clinical characteristics of patients with primary carcinoma.

1. Abstract Twin reversal arterial perfusion sequence is rare, and the most extreme complication of monochorionic monozygotic multiple gestation. Characteristically, there exists a recipient “acardiac” fetus that depends on the other donor, “Pump” fetus.

1. Abstract 1.1. Objective: This study used cone-beam computed tomography (CBCT) analysis to examine the root number and types of maxil lary third molars in Yemen.

1. Abstract Compound volvulus or double volvulus, is a rare surgical emergency causing a closed-loop intestinal obstruction that involves the sigmoid and ileum. In pregnancy, compound volvulus is very rare, ranging from 3.2% to 5.9% of all compound volvulus cases. The mean mortality rate in compound volvulus is 35.5%.

1. Abstract 1.1. Introduction: The purpose of this study is to compare dental and skeletal effects in Herbst appliance treatment without anchorage, with interradicular skeletal anchorage and with skeletal anchorage in the external oblique line.

1. Summary The origin of a coronary artery in a sinus other than the usual one is a rare cause of congenital anomaly, estimated at 0.05% to 0.1% for right coronary arteries originating from the left coronary sinus, with an important potential to cause sudden cardiac death.

1. Abstract 1.1. Purpose: To investigate the effects of high-flow nasal cannula oxygen therapy (HFNC) combined with Acapella PEP treatment on pulmonary function, blood gas analysis, mMRC, and serum inflammatory factor levels in elderly community-acquired pneu- monia (CAP) patients and to assess the clinical therapeutic effect of this method.

Glucagonoma is an extremely rare pNETs, usually presenting with glucagonoma syndrome, Necrolytic Migratory Erythema (NME) is mostly the first clinical manifestation of glucagonoma syndrome. Here we describe a rare case of glucagonoma syndrome accom panied with chronic necrolytic migratory erythema and multiple liver metastasis in a 23-year-old female patient.