LAUSR

© BMJ Publishing Group Limited 2022. No commercial reuse. See rights and permissions. Published by BMJ. DESCRIPTION A 24yearold woman was presented to our emergency department with fever and right upper abdominal pain for 4 days, which worsened with deep breathing. Two weeks earlier, she was treated for possible cystitis with nitrofurantoin and she had treatment for bacterial vaginosis. There was no significant medical history or history of recent highrisk sexual intercourse. Physical examination revealed pain on abdominal palpation in particular at the level of the right upper quadrant. There was no Murphy’s sign. The patient was haemodynamically stable with a blood pressure of 132/84 mm Hg, respiration rate of 18 breaths per minute and a pulse of 74 beats per minute, and there were no signs of heart failure. Laboratory tests demonstrated an increased level of C reactive protein value, mild leucocytosis, negative serum pregnancy test and normal liver function. The ultrasound showed hepatomegaly with no gallbladder and appendiceal pathologies. Abdominal contrastenhanced CT scan (figure 1) showed hepatomegaly with an enhancement of the hepatic capsule of the right lobe. Additionally, there was periportal oedema with inhomogeneous mottled pattern due to heterogenous perfusion of the liver consistent, commonly referred to as a ‘mosaic’ enhancement pattern. This patient could be considered to have a BuddChiari syndrome (BCS) but no venous thrombosis was present. In conjunction with these findings, the patient was admitted for followup and treatment. MRI (figure 2) was performed to further elucidate the findings and showed free fluid in the pouch of Douglas, enlarged right ovary with a heterogeneous cystic compatible with tuboovarian abscess. During hospitalisation, a serological study yielded positive results for both serum Chlamydia trachomatis immunoglobulin IgA and IgG. A PCR study of a cervical mucus sample was positive as well. These history and imaging findings are suggestive of FitzHughCurtis syndrome (FHCS). The patient was treated with intravenous antibiotics (doxycycline, ceftriaxone and metronidazole). After 8 days, she was discharged with a 14 days course of doxycycline and clindamicine and recovered well. FHCS is a rare complication of pelvic inflammatory disease. This condition is characterised by perihepatitis defined as an inflammation of the liver capsule to result from the intraperitoneal spread of pelvic inflammatory disease. There is no single diagnosis goldstandard, so it may be misdiagnosed as many other disorders like acute cholecystitis, right pyelonephritis, pneumonia and even acute appendicitis. In the past, the diagnosis was made by visual or laparoscopic inspection, showing the perihepatic adhesions and the treatment was made by adhesiotomy. Now, with the development of imaging strategies, it can be diagnosed by noninvasive methods. The syndrome can be cured by oral administrations of appropriative antibiotics such as tetracycline, doxycycline or erythromycin. On the other hand, surgical treatment (laparoscopic adhesiolysis) can be preferred only for cases that were unresponsive to antibiotic therapy. Stasis of blood within hepatic sinusoids and the altered haemodynamics that occur with hepatic venous outflow obstruction manifest as a ‘mosaic’ enhancement of the hepatic parenchyma. Hepatic venous outflow obstruction can occur at the following different levels: the heart (in the setting of congestive heart failure such as tricuspid regurgitation, cardiomyopathy, constrictive pericarditis and core pulmonale), inferior vena cava (IVC), hepatic veins (BCS) and at the level of sinusoids and central veins (sinusoidal obstruction syndrome (SOS)). However, a mosaic pattern of enhancement is not entirely specific for hepatic venous outflow obstruction. Hepatic sinusoidal dilatation can also Figure 1 Coronal (A) and axial (B) CT during portal venous phase showed hepatomegaly with enhanced thickening of liver capsule associated with heterogenous enhancement and a ‘mosaic’ appearance (red arrow). Additionally, there was a periportal oedema present also referred to as the periportal halo sign (yellow arrow).