An intracortical chondromyxoid fibroma in the diaphysis of the metatarsal

Abstract

Chondromyxoid fibromas (CMFs) are rare, benign, primary tumors of bones, and occur in the metaphyses of the medullary canals of the long bones. The occurrence of intracortical CMFs is extremely rare. Very few cases of intracortical CMFs located in the long tubular bones have been reported to date. Moreover, even though the feet are the second most common site for CMF (after the knees), intracortical metatarsal CMF has not been reported previously, to our knowledge. We report an intracortical CMF occurring in the diaphysis of the metatarsal in a 17-year-old man. It showed the same imaging findings as usual intramedullary CMFs, except for its cortical location. The development and serial increase in this tumor over time are also demonstrated in this report. Additionally, we present a review of current literature on intracortical CMFs.

Cement arthrodesis of the knee using combined intramedullary nail, plate and screws after wide excision in huge chondromyxoid fibroma of proximal tibia, a case report

“…Based on pathological examination, as the key diagnostic, the tumor is typically lobulated pattern with stellate or spindle shaped cells in a myoid background [17] . The lobules showed hypocellular center with hypercellular peripheries, but its center show morphological features that are similar to hyaline cartilage (extracellular matrix and cell composition).…”

Juxtacortical chondromyxoid fibroma in the small bones: two cases with unusual location and a literature review

“…Juxtacortical CMFs encompass all surface-type tumors including cortical, subperiosteal, periosteal, or parosteal lesions, and the exact origin is not always identified [2]. Of these juxtacortical cases, most involve long bones, with only three cases affecting small bones of the hands or feet (Table 1) [2,7,9]. Four of five cases including ours involved metacarpal or metatarsal bones.…”

“…The tumor typically has eccentric location in the bones, with a few cases of juxtacortical subtypes [2,[4][5][6][7][8][9]. Juxtacortical CMFs encompass all surface-type tumors including cortical, subperiosteal, periosteal, or parosteal lesions, and the exact origin is not always identified [2].…”

Imaging of Pediatric Bone Tumors and Tumor-like Lesions

“…11 They are usually seen in the second and third decades of life and are more prevalent in males. 20 These lesions have a special predilection to tubular bones of the lower limb, most commonly around the knee, followed by the foot. They are medullary metaphyseal (just over 50%) and diaphyseal ( 40%) lesions; however, intracortical, subperiosteal, and juxtacortical locations and also within flat bones were also reported.…”