Differential Diagnosis for Throbbing Pain to Lateral Edge of Fifth Metatarsal
- Single Most Likely Diagnosis + Peroneal Tendinitis/Tendinosis: This condition is characterized by inflammation or degeneration of the peroneal tendons, which run along the lateral edge of the foot, including the area near the fifth metatarsal. The throbbing pain in this specific location is highly suggestive of peroneal tendon pathology, especially given the tendons' proximity to the fifth metatarsal.
- Other Likely Diagnoses + Stress Fracture of the Fifth Metatarsal: Stress fractures are small cracks in the bone that can occur due to repetitive stress or overuse. The fifth metatarsal is a common site for stress fractures, and pain in this area, especially if it's throbbing, could indicate such an injury. + Cuboid Syndrome: This condition involves the cuboid bone, which is located on the lateral side of the foot, near the base of the fifth metatarsal. Cuboid syndrome can cause pain on the lateral edge of the foot, which might be described as throbbing.
- Do Not Miss Diagnoses + Osteonecrosis of the Fifth Metatarsal: Although less common, osteonecrosis (death of bone tissue due to lack of blood supply) of the fifth metatarsal could present with throbbing pain in the area. Missing this diagnosis could lead to significant complications, including bone collapse. + Infection (Osteomyelitis or Soft Tissue Infection): Infections in the bone or soft tissues near the fifth metatarsal can cause severe, throbbing pain. These conditions require prompt diagnosis and treatment to prevent serious complications.
- Rare Diagnoses + Tumor (Benign or Malignant): Although rare, tumors can occur in the bones or soft tissues of the foot, including near the fifth metatarsal. A tumor could potentially cause throbbing pain in this area, especially if it's pressing on surrounding structures. + Entrapment Neuropathy: Compression or irritation of the nerves running through the foot could lead to pain that might be perceived as throbbing, although this would be less common in the specific location of the lateral edge of the fifth metatarsal.