Aponeurotic fibroma (also known as 'Calcifying aponeurotic fibroma,' and 'Juvenile aponeurotic fibroma') is characterized by a lesion that usually presents as a painless, solitary, deep fibrous nodule, often adherent to tendon, fascia, or periosteum, on the hands and feet. Aponeurotic fibroma (also known as 'Calcifying aponeurotic fibroma,' and 'Juvenile aponeurotic fibroma') is characterized by a lesion that usually presents as a painless, solitary, deep fibrous nodule, often adherent to tendon, fascia, or periosteum, on the hands and feet.