A peroneus longus (PL) to Achilles tendon transfer is done to restore strength across the ankle joint. Strength may have been lost due to an injury to the Achilles tendon or a neurological disorder. Also, patients with Achilles tendon pain that has not improved from non-surgical treatment may benefit from this transfer. Other tendons (such as the tendon to the big toe or lesser toes) may be chosen for the transfer instead of the PL, based on the underlying anatomy and function.

The peroneal tendons run on the outside of the ankle just behind the bone called the fibula. Peroneal tendinosis is enlargement and thickening with swelling of these tendons. This usually occurs with overuse, such as a repetitive activity that irritates the tendon over long periods of time. 

Percutaneous Achilles tendon lengthening in a procedure used to stretch a tight Achilles tendon and increase motion at the ankle joint.

Osteochondral lesions, sometimes called osteochondritis dessicans or osteochondral fractures, are injuries to the talus (the bottom bone of the ankle joint) that involve both the bone and the overlying cartilage. These injuries may include softening of the cartilage layers, cyst-like lesions within the bone below the cartilage, or fracture of the cartilage and bone layers. Throughout this article, these injuries will be referred to as osteochondral lesions of the talus (OLT).

Orthotics, also called orthoses, are devices that are worn to relieve pain associated with foot and ankle deformities and help prevent or delay surgery. Most people think of shoe inserts or arch supports when they hear the word orthotics, but they can include devices such as foot pads, shoe inserts, ankle braces, and similar items. Treatment often can begin with less expensive off-the-shelf orthotics and progress to custom orthotics if the symptoms and diagnosis require it.

The naviculocuneiform (NC) joint is located in the middle of the foot. It consists of four bones: the tarsal navicular and the medial, middle, and lateral cuneiforms. 

Osteochondral lesions of the talus (OLT) are ankle joint injuries involving damage to the joint surface (cartilage) and/or underlying ankle bone (talus). A normal, healthy ankle joint is made up of smooth cartilage supported by strong bone underneath. Sometimes an ankle injury leads to damaged, rough areas of cartilage and bone underneath. Foot and ankle orthopaedic specialists call this type of injury an OLT. Since the ankle joint moves while walking, the rough spots may cause pain, swelling, stiffness, and decreased motion. It is kind of like having a pothole in the joint surface.

Morton's neuroma is a thickening of the tissue that surrounds the small nerve leading to the toes. It occurs as the nerve passes under the ligament connecting metatarsal bones in the forefoot. 

Morton's neuroma most frequently develops between the third and fourth toes. It often occurs in response to irritation, trauma, or excessive pressure, and is more common in women.

The midfoot is the middle of the foot. It refers to the bones and joints that make up the arch and connect the forefoot (front of the foot including the bones of the toes) to the hindfoot (back of the foot including the ankle bone and the heel bone).

Midfoot fusion is a procedure in which the different bones that make up the arch of the foot are fused together. Fusion eliminates the normal motion that occurs between two bones. Since there is very little movement in the small joints of the midfoot, the function of the foot can be preserved.

Pain in the ball of your foot, the area between your arch and the toes, is called metatarsalgia (MET-ah-tar-SAL-gee-ah). The pain usually centers on one or more of the five bones (metatarsals) in this area under the toes.