This cine demonstrates the left PLAPS view, showing a large anechoic pleural effusion within the left hemithorax The fluid collection is seen above the diaphragm, separating the spleen below from the adjacent left lung The effusion extends posteriorly and allows clear visualisation of the thoracic spine above the diaphragm (spine sign), confirming the presence of pleural fluid The left lung is seen floating within the effusion and demonstrates dynamic respiratory movement, pr

This cine demonstrates the left PLAPS (Posterolateral Alveolar and/or Pleural Syndrome) view, with the spleen identified inferior to the diaphragm and the left lung visualised above it A large anechoic (black) fluid collection is seen inferior to the diaphragm, surrounding the spleen, consistent with free intraperitoneal ascites The fluid appears simple, without obvious septations or internal echogenic debris The diaphragm is clearly visualised as a bright curvilinear structu

This cine demonstrates a large complex pleural effusion with an associated positive spine sign. An anechoic pleural fluid collection is visualised above the diaphragm, allowing transmission of ultrasound through the thoracic cavity. The vertebral bodies and posterior thoracic tissues can be seen extending cephalad beyond the diaphragm, producing the characteristic spine sign The lung does not move freely throughout the fluid; instead, part of it remains fixed to the diaphragm

Thoracic ultrasound demonstrates a complex loculated pleural effusion, with multiple internal echogenic septations forming separate anechoic fluid compartments. The appearances are not those of a simple transudative effusion and are more suggestive of an exudative/inflammatory process, such as complicated parapneumonic effusion empyema haemothorax, or chronic organised effusion, depending on the clinical context.

Left upper quadrant (LUQ) ultrasound demonstrates anechoic free fluid around the spleen and within the splenorenal recess, consistent with intraperitoneal free fluid The spleen and left kidney are visualised, with fluid tracking in the dependent perisplenic/splenorenal spaces.

A large, deep pocket of anechoic (black) free intraperitoneal fluid is seen, consistent with ascites. Multiple bowel loops are visualised floating freely within the fluid, demonstrating preserved peristalsis and respiratory movement, producing the characteristic 'floating bowel' appearance. The fluid appears simple, without obvious septations, loculations, or echogenic debris. The bowel loops are freely mobile and non-adherent, confirming free peritoneal fluid rather than a c