🔊 Men's Health

Ultrasound Scan — What to Expect and How to Read Results

Nigeria's most widely used medical imaging — demystified

Ultrasound (sonography) uses high-frequency sound waves to create images of structures inside the body — without radiation. It is the most widely used imaging modality in Nigeria, available at virtually all secondary and tertiary hospitals and many private clinics. Ultrasound is particularly valuable for imaging soft tissues, abdominal organs, the pelvis, obstetric assessment (pregnancy), the heart (echocardiography), and blood vessels. It is real-time (you can see movement), portable, relatively cheap, and completely safe — with no radiation. Understanding what your ultrasound report says helps you engage meaningfully with your doctor.

Signs and Symptoms

✓ Ultrasound is ordered for: abdominal pain, pregnancy monitoring, liver/kidney/spleen assessment, pelvic pain, thyroid lumps, breast lumps, scrotum/testicle assessment, guiding needle biopsies, vascular blood flow assessment

✓ No radiation — safe in pregnancy, safe to repeat frequently

✓ Preparation varies by type of scan

Risk Factors

Preparation guide:
Abdominal ultrasound: fast for 4–6 hours beforehand (reduces bowel gas that blocks views). Drink 1 litre of water 1 hour before and do not urinate — full bladder improves views of pelvic organs
Pelvic ultrasound (transabdominal): full bladder required
Transvaginal ultrasound (TVS): bladder should be empty
Obstetric ultrasound: full bladder for early pregnancy scans, empty bladder in third trimester
Thyroid, breast, testis, Doppler: no preparation needed

When to Seek Help

Any abdominal, pelvic, or pregnancy-related symptomUltrasound is the first-line imaging — available same day at most Nigerian hospitals

Pregnancy: booking scan at 8–12 weeks, anomaly scan at 18–22 weeksStandard obstetric scanning schedule — check dates and book ahead at antenatal clinic

Worrying lump in breast, thyroid, or testicleUltrasound characterises the lump — solid vs fluid-filled, features suggesting benign or malignant

Liver disease monitoring (hepatitis B, cirrhosis)6-monthly liver ultrasound + AFP for liver cancer surveillance

Tests & Diagnosis

🧪 Abdominal ultrasound findings — key terms

Echogenic: bright on ultrasound (liver parenchyma is reference). Hyperechoic: brighter than reference — fat, calcification. Hypoechoic: darker — fluid, tumour. Anechoic: completely dark — pure fluid (bile, urine, blood). Acoustic shadowing: dark area behind a bright object — gallstone or kidney stone casting shadow

🧪 Liver

Normal: homogeneous echo texture, smooth edges, < 15cm in length. Fatty liver: increased echogenicity (bright). Cirrhosis: coarse echo texture, nodular surface, small liver in late stage. Haemangioma: bright well-defined lesion — usually benign. Abscess: fluid collection with internal echoes

🧪 Gallbladder

Normal: thin-walled (< 3mm), filled with anechoic bile. Gallstones: bright echoes with posterior acoustic shadow. Cholecystitis: thick wall (> 3mm), pericholecystic fluid, tender on probe pressure (sonographic Murphy's sign)

🧪 Kidney

Normal: 9–12cm, smooth outline. Hydronephrosis: dilated pelvicalyceal system — caused by stone or obstruction. Cyst: anechoic round structure with smooth thin wall — usually benign. Mass: irregular hypoechoic lesion — needs further evaluation

🧪 Obstetric ultrasound terms

CRL (crown-rump length) — estimates gestational age in first trimester. BPD (biparietal diameter), HC (head circumference), AC (abdominal circumference), FL (femur length) — in second/third trimester. EFW (estimated fetal weight). AFI/MVP (amniotic fluid). Placental location and grade

🧪 Cardiac ultrasound (echo)

EF (ejection fraction): normal > 55%. LVH (left ventricular hypertrophy). Valvular regurgitation or stenosis. Pericardial effusion (fluid around heart)

Treatment Options

Incidental findings — what to do

Many ultrasound scans find unexpected findings. Simple liver cysts, small haemangiomas, renal cysts — most are benign and need no treatment. Discuss any finding with your doctor before worrying

When ultrasound is not enough

Ultrasound has limitations: bowel gas, obesity, and bone block the sound waves. CT or MRI may be needed for more detailed assessment of structures ultrasound cannot see well

FAST scan in trauma

Focused Assessment with Sonography in Trauma — rapid ultrasound at bedside in trauma patients to detect free fluid (blood) in abdomen or around heart. Performed in emergency departments

Frequently Asked Questions

Is ultrasound harmful in pregnancy?

No — ultrasound has been used in pregnancy for over 50 years with no evidence of harm. Unlike X-ray or CT, ultrasound uses sound waves (not radiation). It is safe to repeat throughout pregnancy and is the standard tool for all obstetric monitoring.

My ultrasound report says 'mild hepatomegaly' — is this serious?

Hepatomegaly means an enlarged liver (usually > 15cm). Mild hepatomegaly alone, without other abnormal features, is a common and often non-specific finding — it can result from fatty liver disease, alcohol, infection, heart failure, or even a normal variant. Your doctor needs to correlate this with your symptoms, liver function tests, and clinical examination.

What does 'no significant abnormality detected' mean?

It means the doctor did not find any abnormality on the scan within the limits of the technique. It does not guarantee that no problem exists — ultrasound has limitations and some conditions are not visible. If your symptoms persist despite a normal ultrasound, further investigation (CT, MRI, laparoscopy) may be needed.

My baby was seen with a 'bright bowel' on ultrasound — what does this mean?

Echogenic (bright) fetal bowel is a soft marker sometimes seen in the second trimester. Associations include: cystic fibrosis (if both parents are carriers), Down syndrome, cytomegalovirus (CMV) infection, swallowed blood, or it may be a normal variant. Additional investigations (detailed anomaly scan, blood tests) are usually recommended to exclude the serious associations.