Differential Diagnosis for Posterior and Lateral Heel Pain

Primary Differential Diagnoses

• The American Academy of Family Physicians suggests that lateral ankle ligament injury, such as calcaneofibular ligament sprain, is a common cause of lateral heel pain, particularly with inversion trauma and pain with dorsiflexion 1.
• The American Academy of Family Physicians recommends considering Haglund's deformity with retrocalcaneal bursitis in patients with posterior and lateral heel pain, particularly when the prominent posterior superior calcaneus causes inflammation of the overlying bursa 2.
• The American College of Radiology indicates that lateral process fracture of the talus, also known as "snowboarder's fracture", can cause lateral and posterior ankle pain with an antalgic gait, particularly following inversion trauma 3.

Key Examination Findings to Differentiate

• The American Academy of Family Physicians suggests that point tenderness location, such as palpating the Achilles insertion, lateral malleolus, posterior superior calcaneus, lateral calcaneal wall, and over the calcaneofibular ligament course, can help differentiate between diagnoses 1, 2.
• The American Academy of Family Physicians recommends the calcaneal compression test, which involves squeezing the calcaneus from medial to lateral, to suggest stress fracture 2.
• The American College of Radiology indicates that rapid onset of swelling suggests acute ligamentous injury or fracture, and lateral gutter swelling indicates lateral ligament involvement 1.

Imaging Recommendations

• The American College of Radiology recommends initial radiographs if the patient meets Ottawa Ankle Rules criteria, including inability to bear weight immediately after injury, point tenderness over the malleoli/talus/calcaneus, or inability to ambulate 4 steps 3.
• The American College of Radiology suggests that if radiographs are negative but pain persists >1 week, MRI without contrast or CT without contrast are equivalent alternatives for further evaluation 3.
• The American Academy of Family Physicians recommends technetium bone scanning for suspected stress fracture with negative initial radiographs, as symptoms often occur before the fracture is radiographically visible 2.

Common Pitfalls

• The American Academy of Family Physicians suggests reexamination timing, always reexamining 3-5 days post-injury, as excessive swelling and pain can limit the initial examination within 48 hours 1.
• The American Academy of Family Physicians recommends being aware of overlooking stress fractures, as patients often report increased walking activity before symptom onset, and radiographs may initially be negative 2.

Management of Persistent Heel Pain

Diagnostic Approach

• Posterior heel pain indicates Achilles tendonitis or bursitis, according to the American Academy of Family Physicians 4
• Lateral heel pain may suggest Haglund's deformity or sinus tarsi syndrome, as noted by the American Academy of Family Physicians 5
• Diffuse heel pain could indicate stress fracture or heel pad syndrome, as reported by the American Academy of Family Physicians 6
• Burning or tingling suggests neurologic causes, according to the American Academy of Family Physicians 6
• Pain relieved when walking barefoot but worsened by shoes suggests Haglund's deformity or bursitis, as noted by the American Academy of Family Physicians 4

Treatment Algorithm Based on Diagnosis

• For plantar fasciitis, initial treatment includes rest and activity modification, NSAIDs for pain and inflammation, stretching exercises for plantar fascia and Achilles tendon, heel cushions, arch supports, or orthotics, and weight loss if indicated, as recommended by the American Academy of Family Physicians 7
• For insertional Achilles tendonitis, initial treatment includes open-backed shoes to reduce pressure, heel lifts or orthoses, NSAIDs, decreased activity, stretching exercises, and weight loss if indicated, according to the American Academy of Family Physicians 4
• For Haglund's deformity with bursitis, initial treatment includes open-backed shoes, orthoses and accommodative padding, NSAIDs, corticosteroid injections (avoiding the Achilles tendon), and physical therapy, as noted by the American Academy of Family Physicians 4
• For neurologic heel pain, immediate subspecialist referral for evaluation and diagnostic testing is recommended, including electromyography, nerve conduction studies, and MRI, as reported by the American Academy of Family Physicians 8
• For traumatic heel pain (stress fracture), protect and immobilize the foot, and consider imaging studies (X-ray initially, bone scan if needed), according to the American Academy of Family Physicians 6 and 8

Common Pitfalls and Caveats

• Corticosteroid injections should be used judiciously and are contraindicated near the Achilles tendon, as warned by the American Academy of Family Physicians 4

When to Refer

• No improvement after 6-8 weeks of appropriate conservative treatment, as recommended by the American Academy of Family Physicians 9
• Need for advanced imaging or diagnostic testing, such as X-ray or bone scan, as noted by the American Academy of Family Physicians 6
• Consideration of surgical intervention, according to the American Academy of Family Physicians 7

Differential Diagnosis of Calcaneal Pain

Clinical Presentation and Diagnosis

• The American Academy of Family Physicians suggests that calcaneal stress fracture presents with progressively worsening pain following increased activity or change to a harder walking surface, and pain on compression of the calcaneus from medial to lateral (calcaneal squeeze test) is highly suspicious 10.
• The American Academy of Family Physicians recommends that tenderness localizes to the lateral calcaneal wall, slightly posterior to the subtalar joint facet, in cases of calcaneal stress fracture 10.
• The American Academy of Family Physicians notes that symptoms of calcaneal stress fracture often precede radiographic findings, requiring technetium bone scanning or MRI for early diagnosis 10.
• The American Academy of Family Physicians states that insertional Achilles tendonitis produces pain at the tendon insertion site 10.
• The American Academy of Family Physicians suggests that Haglund's deformity with retrocalcaneal bursitis presents with posterior and lateral heel pain, typically associated with a prominent posterior superior calcaneus visible on radiographs 10.
• The American Academy of Family Physicians recommends that Sever disease (calcaneal apophysitis) is the most common cause of heel pain in adolescents and children 10.
• The American Academy of Family Physicians notes that acute calcaneal fracture from a fall onto the heel from height causes diffuse rearfoot pain, poorly localized with intra-articular fractures involving the subtalar joint 10, 11, 12.
• The American Academy of Family Physicians states that diagnosis of acute calcaneal fracture requires history of trauma, focal palpation tenderness, and radiographic confirmation 10.
• The American Academy of Family Physicians suggests that arthritides can cause heel pain, particularly in patients with bilateral symptoms, pain in other joints, or known inflammatory arthritis conditions 10.
• The American Academy of Family Physicians recommends that infections (soft tissue and bone osteomyelitis) rarely cause heel pain but require proper diagnostic testing and consultation when suspected 10, 11, 12.
• The American Academy of Family Physicians notes that tumors (malignant and benign) are rare causes requiring appropriate referral 10, 11, 12.
• The American Academy of Family Physicians states that vascular compromise can result in heel pain and necessitates proper diagnostic evaluation 10, 11, 12.

Diagnostic Approach for Heel Pain

Imaging Recommendations

• The American College of Radiology recommends weight-bearing radiographs of the foot as the initial imaging modality, with a sensitivity of 85% and specificity of 95% for plantar fasciitis 13
• Radiographs are typically insensitive for fasciitis but useful to exclude other causes and identify calcaneal spurs, according to the American College of Radiology 13