Case Report
Fibrous Dysplasia Arising from the
Calcaneus
-
SHUJI ISEFUKU,
MASAHITO HATORI,
SHIGERU EHARA,1
MASAMI HOSAKA, KATSU
ITO2 and SHOICHI
KOKUBUN
- Department of Orthopaedic Surgery,
Tohoku University School of Medicine, Sendai 980-8574,
1Department of Radiology, Iwate Medical University
School of Medicine, Morioka 020-8505, and 2Department
of Orthopaedic Surgery, Hukaya Hospital, Miyagi 987-1222
A case of an 18-year-old
woman with fibrous dysplasia arising in the calcaneus, which is
extremely rare, is reported, with the emphasis placed on differential
diagnosis from low-grade central osteosarcoma. She had a severe pain
in her left ankle after sprain. Plain radiographs showed a
radiolucent lesion measuring 6.3×2.5 cm with a sclerotic margin
in the left calcaneus. CT scans showed a well-defined lytic lesion
with disruption of the lateral cortex and an ossification or
calcification in its center. On MR imaging, the lesion had
iso-intensities and high intensities on T1 and T2 weighted images,
respectively, but its central portions showed lower intensities both
on T1 and T2 weighted images. The lesion was enhanced with gadolinium
except for the central portions. The specimen obtained by open biopsy
consisted of fibrous tissue and foci of irregular woven bone. None of
the nuclear atypia, mitoses, longitudinal stream of bone or invasive
nature of growth was detected. The diagnosis of fibrous dysplasia was
histologically made. The lesion was curetted and packed with
autogenous bone chips. No evidence of recurrence was noted
postoperatively.
Key words--- fibrous dysplasia; calcaneus;
differential diagnosis
© 1999 Tohoku University Medical Press
Tohoku J. Exp. Med., 1999,
189, 227-232
Address for reprints: Masahito Hatori, M.D., Department of
Orthopaedic Surgery, Tohoku University School of Medicine, 1-1
Seiryomachi, Aoba-ku, Sendai 980-8574, Japan.
e-mail: mhato@gonryo.med.tohoku.ac.jp
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