UNASSIGNED: Acute appendicitis is widely recognized as the prevailing abdominal surgical emergency globally, exhibiting an annual incidence ranging from 96.5 to 100 cases per 100,000 adults. Conversely, situs inversus totalis is a rare anatomical anomaly characterized by the complete reversal of the chest and abdominal organs, occurring in approximately 1 out of every 10,000 to 50,000 individuals.
UNASSIGNED: 53-year-old female patient who presented to the emergency department with a complaint of diffuse abdominal pain of colic nature that had persisted for 5 days. The patient referred systemic hypertension, pre-diabetes mellitus type 2, and situs inversus as relevant medical history. A laparotomy procedure was conducted, revealing a perforated appendix located in the right hypochondrium. Additionally, the patient exhibited situs inversus totalis, with the colon positioned in its normal anatomical location.
UNASSIGNED: Due to the low incidence of situs inversus totalis, in cases similar to the one presented, the utilization of image studies and laboratory studies is imperative for accurate diagnosis. In the face of diagnostic suspicions and inconclusive paraclinical studies, the most effective approach is to pursue surgical examination and intervention, preferably utilizing laparoscopic techniques.
UNASSIGNED: la apendicitis aguda es la urgencia quirúrgica abdominal más frecuente en el mundo, con una incidencia anual de 96.5 a 100 casos por 100,000 adultos. Por otra parte, el situs inversus totalis es un trastorno posicional inverso de los órganos torácicos y abdominales con una incidencia de 1 en 10,000 a 50,000 personas.
UNASSIGNED: paciente del sexo femenino de 53 años que se presentó en sala de urgencias refiriendo dolor abdominal difuso tipo cólico de 5 días de evolución. La paciente refirió hipertensión arterial sistémica esencial, prediabetes mellitus tipo 2 y situs inversus. Se realizó intervención quirúrgica (laparotomía) en la que se encontró el apéndice perforado en hipocondrio derecho y situs inversus totalis con colon en posición anatómica normal.
UNASSIGNED: debido a la baja incidencia del situs inversus totalis, el diagnóstico en casos como el presentado representa un reto en el que el uso de estudios de imagen y laboratorio resulta indispensable. Ante la sospecha diagnóstica y estudios paraclínicos con resultados no concluyentes, la mejor estrategia consiste en la exploración y el manejo quirúrgicos, preferentemente laparoscópicos.

Polysplenia syndrome is an embryological disorder whereby the usual left-right asymmetry of thoracic and abdominal viscera fails to develop. It is a rare entity, estimated to occur at a frequency of 1 in 40,000, and is often associated with cardiac and biliary abnormalities. More than 75% of patients die before the age of 5 years, and even in the absence of cardiac anomalies, only 5%-10% of patients are expected to survive into adulthood without complications. Although polysplenia syndrome encompasses a wide range of anatomic abnormalities, there is no single pathognomonic feature. Hence, the prognosis of patients with polysplenia depends on their anatomy, thus necessitating radiology in their management. Here we present a case of a 56-year-old man with polysplenia syndrome and situs inversus totalis. This presentation is atypical because polysplenia is usually considered a form of situs ambiguus, and cases with situs inversus totalis are exceedingly rare. Also noted in our patient are variations in the great vessels, including aortic arch branches and the venae cavae which are features not typically associated with either polysplenia syndrome or situs inversus totalis. The patient is healthy and asymptomatic at baseline, with his diagnosis being made incidentally. Our case report is the first to describe this unique combination of cardiothoracic and cardiovascular anatomy. It also emphasizes the importance of radiologists in caring for patients with laterality defects. As these disorders are uncommon, more data on their anatomic variations may help provide better medical care to this patient population.

BACKGROUND: A dramatic increase in fetal situs inversus diagnoses by ultrasound in the months following the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) surge of December 2022 in China led us to investigate whether maternal SARS-CoV-2 exposure could be associated with elevated risk of fetal situs inversus.
METHODS: In this multi-institutional, hospital-based, matched case-control study, we investigated pregnant women who underwent ultrasonographic fetal biometric assessment at gestational weeks 20-24 at our hospitals. Each pregnant woman carrying a situs inversus fetus was randomly matched with four controls based on the date of confinement. Relevant information, including SARS-CoV-2 infection, and other potential risk factors were collected. Conditional logistic regression was used to test possible associations between fetal situs inversus and SARS-CoV-2 infection at different gestational weeks as well as individual risk factors.
RESULTS: A total of 52 pregnant women diagnosed with fetal situs inversus between January 1 and October 31, 2023 and 208 matched controls with normal fetuses were enrolled. We found no association between an increased risk of fetal situs inversus with gestational SARS-CoV-2 infection or with other risk factors. However, fetal situs inversus was significantly associated with SARS-CoV-2 infection specifically in gestational weeks 4-6 (adjusted odds ratio [aOR] 6.54 [95% confidence interval 1.76-24.34]), but not with infection at other gestational ages, after adjusting for covariates.
CONCLUSIONS: Increased risk of fetal situs inversus is significantly associated with maternal SARS-CoV-2 infection at gestational weeks 4-6, corresponding to the fetal developmental window for visceral lateralization in humans.
BACKGROUND: National Key R&D Program of China, etc.

Primary Ciliary Dyskinesia (PCD) is a rare autosomal recessive disorder caused by impaired ciliary function. The incidence of PCD is 1 in 20,000 births. Kartagener\'s syndrome (KS), a subtype of PCD, is distinguished by the presence of situs inversus. KS occurs in about 1 in 32,000 to 40,000 births. Characterized by a triad of situs inversus totalis, sinusitis, and typically lower lobe bronchiectasis, Kartagener\'s syndrome presents with distinct radiological features, which are explored in this case study. We report on an adolescent male with Kartagener\'s syndrome, manifesting atypical bronchiectasis in the left upper lobe, leading to a bilateral lung transplant, and severe pectus excavatum requiring surgical correction. This case documents a male patient with concurrent Kartagener\'s syndrome and pectus excavatum, supporting a previously explored, albeit theoretical association between these conditions.

Obesity prevalence is increasing with the modern lifestyle. Bariatric surgery is an excellent method to sustain weight reduction and the most commonly performed surgery is laparoscopic sleeve gastrectomy (LSG). The laparoscopic approach can be challenged in certain conditions such as situs inversus totalis (SIT). We report a 38-year-old gentleman with class II obesity known to have SIT. After complete preoperative preparation, we performed LSG with no complications. The main difficulty of performing any surgical procedure for SIT patients is the reversed anatomy. It is essential to highlight the importance of anatomy for surgeons. Proper preoperative anatomy assessment along with the surgeon\'s experience is the key element to perform LSG or any bariatric laparoscopic procedure in rare conditions such as SIT.

Dextrocardia associated with situs inversus totalis is a rare congenital anomaly. We herein report a patient with this condition and ischemic coronay artery disease who underwent emergency surgical myocardial revascularization. A 76-year-old man was admitted to our hospital with a diagnosis of unstable angina pectoris. He had incessant ventricular fibrillation attack on the second day of hospitalization. Emergent coronary angiography revealed total obstruction of the anatomically left anterior descending and right coronary arteries, and severe stenosis in the anatomically left circumflex artery. Emergent off-pump coronary artery bypass using saphenous vein grafts was successfully performed. Intraoperatively, the main surgeon continuouly stood on the patient\'s right side except during anastosiso of a vein graft to the left circumflex artery. Postoperative course was almost uneventful aside from transient renal replacement and prolonged ventilation.

Kartagener\'s syndrome is an uncommon autosomal recessive ciliary dyskinesia. It combines a triad comprised of bronchiectasis, chronic sinusitis, and situs inversus. This work aims to describe the clinical and paraclinical aspects of primary ciliary dyskinesia using Kartagener\'s syndrome as a model and to highlight the difficulties of confirming the diagnosis in our context. We report four observations (three boys and one girl with an average age of 10 years) of Kartagener\'s syndrome collected in the department of pediatric pneumo-allergology. Chronic bronchorrhea and otorhinolaryngological manifestations were found in all cases. Signs of neonatal respiratory distress syndrome were found in only one case. One child had dysmorphic facial features suggestive of Noonan\'s syndrome and conductive hearing loss. Digital hippocratism was found in half of the cases, along with pulmonary crackles and heart sounds perceived on the right. A chest CT scan showed bronchiectasis in all patients and necrotic adenopathy suggestive of tuberculosis in one case. Sinus imaging showed an appearance of pansinusitis. All children had abdominal situs inversus with dextrocardia. They had received antibiotic therapy with amoxicillin-clavulanic acid associated with respiratory physiotherapy. The girl had benefited from a right lobectomy with a follow-up of 18 months and a good evolution. In light of these four observations, Kartagener\'s syndrome is a rare disease but can be compatible with normal life if the treatment is done early. However, in our context, the difficulty of confirming the diagnosis explains its delay with the risk of progression of pulmonary lesions.

Cryoballoon ablation has been established as an effective method for pulmonary vein isolation and has recently been investigated for its efficacy of substrate modification on the left atrial roof area in patients with persistent atrial fibrillation. We herein report the first successful case of left atrial posterior wall isolation including roof line ablation using cryoballoons in a patient with persistent atrial fibrillation, dextrocardia, and situs inversus. Cryoballoon ablation proved to be a safe and straightforward approach to create lasting lesions along the left atrial roof line and left atrial posterior wall, even under challenging anatomical conditions.

Situs inversus complicates diagnosis and treatment due to the mirrored organ placement in relation to normal anatomy. This report describes a 78-year-old female patient with situs inversus totalis who underwent laparoscopic cholecystectomy and laparoscopic common bile duct exploration for cholecystolithiasis and choledocholithiasis. Utilizing the \"French mirror technique\" for port placement, the surgeon adeptly mirrored standard maneuvers with a 2-mm needle forceps in the left hand and a 5-mm forceps in the right in a reversed anatomical setting. This technique maintained familiar hand movements, despite the patient\'s unique anatomy. The surgeon applied transcystic ductal bile duct exploration, using choledochoscopy for duct exploration and a basket catheter for stone removal. Laparoscopic cholecystectomy and common bile duct exploration through the transcystic ductal route are viable and effective for patients with situs inversus.

Defects in motile cilia, termed motile ciliopathies, result in clinical manifestations affecting the respiratory and reproductive system, as well as laterality defects and hydrocephalus. We previously defined biallelic MNS1 variants causing situs inversus and male infertility, mirroring the findings in Mns1-/- mice. Here, we present clinical and genomic findings in five newly identified individuals from four unrelated families affected by MNS1-related disorder. Ciliopathy panel testing and whole exome sequencing identified one previously reported and two novel MNS1 variants extending the genotypic spectrum of disease. A broad spectrum of laterality defects including situs inversus totalis and heterotaxia was confirmed. Interestingly, a single affected six-year-old girl homozygous for an MNS1 nonsense variant presented with a history of neonatal respiratory distress syndrome, recurrent respiratory tract infections, chronic rhinitis, and wet cough. Accordingly, immunofluorescence analysis showed the absence of MNS1 from the respiratory epithelial cells of this individual. Two other individuals with hypomorphic variants showed laterality defects and mild respiratory phenotype. This study represents the first observation of heterotaxia and respiratory disease in individuals with biallelic MNS1 variants, an important extension of the phenotype associated with MNS1-related motile ciliopathy disorder.