As I said, I am perfectly aware of exactly where the perineum is

I misspoke, okay? I usually associate the word with abdominal/pelvic CTs because that is when I usually hear it. I was trying to help, and I didn't expect to be jumped on. I have been doing medical transcription since 1971, so I do have a little experience.

And re "peroneal," I happen to hear that most often when transcribing CTs or MRIs of the knee. Per Wheeless' Textbook of Orthopaedics (below) the peroneal nerve branches off the sciatic nerve and runs almost the entire length of the leg.  And I won't even get into the peroneal arteries and veins (which run from the knee to the ankle), muscles (peroneus longus and brevis), and tendons (which are the only part that is confined only to the ankle area, as mentioned above).

- Anatomy: 
- common peroneal nerve is derived from (L4, L5, S1, S2) as a part of the sciatic nerve; 
- posterior component, supplies short head of biceps femoris in thigh, crosses posterior to lateral head of gastrocnemius, and becomes subcutaneous behind head of fibula; 
- it penetrates the posterior intermuscular septum, and becomes closely opposed to the periosteum of the proximal fibula; 
- it then divides into superficial & deep peroneal nerves; 
- the nerve also gives off a lateral sural cutaneous brach which joins with the the medial sural cutaneous nerve (from tibial nerve) to form the sural nerve; 
- superficial peroneal nerve: 
- supplies lateral compartment of leg, first passing between peroneus longus 
 - passes in a straight line from the common peroneal nerve; 
- along the length of the proximal one third of the fibula, the superficial peroneal nerve is on the lateral cortex of the fibula; 
- passes between peroneus longus & peroneus brevis; 
- superficial sensory nerves: 
- subcutaneous superficial sensory branch lies between peroneus brevis and EDL msucles. 
- superficial peroneal nerve is accompanied by a true vascular axis that is supplied by tibialis anterior artery along its course. 
- about 10-12 cm above the tip of the lateral malleolus, the superficial peroneal nerve pierces the fascia; 
- about 6-7 cm distal to the fibula, the superficial peroneal nerve bifurcates into intermediate and medial dorsal cutaneous nerves; 
- location of cutaneous nerves: (from Huene and Bunnell 1995) 
- branches of the superficial peroneal nerve or the sural nerve may be injured during ORIF of Ankle frx; 
- these nerves are most at risk at the junction of the distal and middle thirds of the lateral border of the fibula; 
- in 22% of legs, braches of either nerve will cross the frx site; 
- in 54% of legs, branches of superficial peroneal will lie within 5 mm of the anterolateral border of the fibula; 
- safest interval is 12 mm posterior to the anterolateral border of the fibula at 10 cm from the fibular tip, and 10 mm posterior to the anterolateral border at 5 cm proximal to the tip

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help what is this? 'perineum clipped as an infant'?