S1 dermatomal numbness: Radiculopathy or Morton’s neuroma

Abstract

Morton’s neuroma refers to a degenerative, compressive neuropathy affecting one of the common digital nerves in the forefoot, typically situated between the heads of the third and fourth metatarsal bones. The condition arises primarily due to repetitive compression and mechanical irritation of the interdigital nerve, particularly beneath the plantar portion of the transverse intermetatarsal ligament. Although historically labelled a “neuroma,” this entity lacks neoplastic features and is instead characterised by perineural fibrosis and nerve degeneration. It is known by several alternative terms in medical literature, including interdigital neuritis, intermetatarsal neuroma, Morton’s metatarsalgia, interdigital neuralgia, interdigital nerve entrapment, and interdigital compression neuropathy (1, 2). This case report describes a 45-year-old female patient with a typical Morton’s neuroma, who underwent surgical treatment after experiencing symptoms for over a 15 years