Ultrasound guided biopsy

Dr Ian Bickle et al.

Ultrasound guided biopsy is one form of image guided biopsy, typically performed by a radiologist.  It is the most common form of image guided biopsy, offering convenience and real time dynamic observation with echogenic markers on cannulae allowing for precise placement.

It can potentially be used to perform a biopsy of any body part, being regularly used to biopsy the kidney, liver, breast and lymph nodes. There can be some minor procedural variation in the type of biopsy performed.

Biopsies may be focal or non-focal in nature. Lesions as small as 5 mm may be biopsied, with a range of biopsy needle gauges and sizes available (from 22G to 14G). Broadly speaking needles may be single or co-axial  and have 10 mm or 20 mm cutting lengths.

Most common percutaneous biopsies
Laboratory parameters for a safe procedure

Biopsies in deep structures require special attention to coagulation indices. There are widely divergent opinions about the safe values of these indices for percutaneous biopsies. The values ​​suggested below were considered based on the literature review, whose references are cited below.

Complete blood count: Platelet > 50000/mm3  (some institutions determine other values between 50000-100000/mm31,3.

Coagulation profile: Some studies showed that having a normal INR or prothrombin time is no reassurance that the patient will not bleed after the procedure2.

  • international normalized ratio (INR) ≤1.5 3
  • normal prothrombin time (PT), partial thromboplastin time (PTT)

The contraindications must be considered individually in each case. Overall, the most important contraindications to percutaneous biopsies are:

  • uncooperative patient
  • lack of safe access
  • uncorrectable bleeding diathesis (abnormal coagulation indices)
Ultrasound - general index
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Article information

rID: 21143
Tag: refs
Synonyms or Alternate Spellings:
  • Ultrasound guided biopsies

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Cases and figures

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    Co-axial needle
    Figure 1: photograph - typical co-axial needle
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    Images obtained d...
    Case 1: breast mass
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    Alternative biops...
    Figure 2: photograph - renal biopsy gun
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    Case 2: needle position beautifully illustrated
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    Case 3: liver biopsy
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    Case 4: haemorrhage post liver biopsy
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    Case 5
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    Case 6: head and neck biopsy
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