Sonographic diagnosis of appendicitis: A pictorial essay and a new diagnostic maneuver

While many cases of appendicitis are easy to diagnose clinically, a significant number need further workup in the form of imaging. Ultrasound and CT are both used extensively to diagnose or exclude appendicitis, or arrive at an alternate diagnosis. Ultrasound has many advantages but can be a difficult modality to use due to, among other reasons, the anatomical variations in appendicial location. The true retrocolic appendix is particularly difficult to diagnose with ultrasound. This pictorial essay examines the ultrasound features of normal and diseased appendix and proposes a new examining station, the prone view, for visualizing true retrocolic appendicitis.

Role of hysterosalpingoscintigraphy in the workup of infertility

OBJECTIVE

To assess the role of hysterosalpingoscintigraphy (HSSG) in the evaluation of fallopian tube patency and function and compare the results with hysterosalpingography (HSG) and laparoscopy (LS).

DESIGN

Cross-sectional study.

PLACE AND DURATION OF STUDY

The study was conducted at Multan Institute of Nuclear Medicine and Radiotherapy (MINAR), Multan from August 2004 to February 2005.

PATIENTS AND METHODS

HSSG was performed after instillation of 4mCi (148 MBq) 99mTechnetium-macroaggregated albumin (99mTc-MAA) in posterior vaginal fornix in 65 patients. Serial static images were acquired in supine position at 1 hour, 2 hours, 3 hours and, if needed, at 24 hours. The results were compared to the findings on LS and HSG.

RESULTS

Out of 65 patients, 37 (56.9%) patients had bilateral blocked tubes, 17 (26.1%) patients had bilateral patent tubes, 6 (9.2%) patients had blocked left tube and 5 (7.1%) patients had blocked right tube. The calculated sensitivity, specificity, positive predicted value (PPV), negative predicted value (NPV) and accuracy for HSSG were 90%, 83%, 90% and 90% respectively. The agreement between HSSG and LS was found in 32 out of 35 patients and agreement between HSG and HSSG was found in 24 out of 30 patients.

CONCLUSION

This simple procedure can delineate tubal physiology; in selected cases it can replace HSG and in others augment the information gathered by HSG. HSSG should be part of the infertility workup algorithm.