The notch of harty (pseudodefect of the tibial plafond)

Frequency and characteristic findings at MRI of the ankle

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3 Citations (Scopus)

Abstract

OBJECTIVE. The purpose of this study is to report the frequency and characteristic findings of the notch of Harty as seen on MRI. MATERIALS AND METHODS. One hundred six consecutive ankle MRI studies performed at 1.5 or 3 T were reviewed retrospectively by two radiologists. Findings relating to the notch of Harty and ankle joint were recorded and analyzed, including qualitative assessment of the presence of the notch, focal chondral thinning or focal subcortical osteosclerosis at the notch, notch width and depth, osteochondral lesions elsewhere in the ankle, subchondral edema signal or cystic change at the tibial plafond, and the presence of an ankle joint effusion. RESULTS. The study group of 106 patients consisted of 48 Male and 58 feMale patients, with a mean age of 44.5 years (SD, 17.5 years). The notch was identified in 48 of 106 patients (45%) (24 Male and 24 feMale patients; mean age, 43.1 years; range, 7-79 years). When present, the notch averaged 6.2 mm (SD, 1.6 mm) in width and 1.2 mm (SD, 0.5 mm) in depth. The notch was graded as prominent in six of the 106 ankle MRI examinations (6%). Subchondral edemalike signal or cystic change was not localized to the notch in any case. Between patients with versus those without a notch, there was no statistically significant difference in age, sex, subjacent subcortical osteosclerosis, ankle joint effusion, osteochondral lesions elsewhere in the ankle, or subchondral bone marrow edema at the tibial plafond. CONCLUSION. The notch of Harty can be observed as an anatomic variant on MRI and should be differentiated from a traumatic osteochondral lesion.

Original languageEnglish (US)
Pages (from-to)358-363
Number of pages6
JournalAmerican Journal of Roentgenology
Volume205
Issue number2
DOIs
StatePublished - Aug 1 2015

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Ankle
Ankle Joint
Osteosclerosis
Edema
Cartilage
Bone Marrow

Keywords

  • Ankle
  • MRI
  • Normal variation
  • Osteochondral lesion

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

@article{1518ffc8f69c4bd98c7337314fae29ab,
title = "The notch of harty (pseudodefect of the tibial plafond): Frequency and characteristic findings at MRI of the ankle",
abstract = "OBJECTIVE. The purpose of this study is to report the frequency and characteristic findings of the notch of Harty as seen on MRI. MATERIALS AND METHODS. One hundred six consecutive ankle MRI studies performed at 1.5 or 3 T were reviewed retrospectively by two radiologists. Findings relating to the notch of Harty and ankle joint were recorded and analyzed, including qualitative assessment of the presence of the notch, focal chondral thinning or focal subcortical osteosclerosis at the notch, notch width and depth, osteochondral lesions elsewhere in the ankle, subchondral edema signal or cystic change at the tibial plafond, and the presence of an ankle joint effusion. RESULTS. The study group of 106 patients consisted of 48 Male and 58 feMale patients, with a mean age of 44.5 years (SD, 17.5 years). The notch was identified in 48 of 106 patients (45{\%}) (24 Male and 24 feMale patients; mean age, 43.1 years; range, 7-79 years). When present, the notch averaged 6.2 mm (SD, 1.6 mm) in width and 1.2 mm (SD, 0.5 mm) in depth. The notch was graded as prominent in six of the 106 ankle MRI examinations (6{\%}). Subchondral edemalike signal or cystic change was not localized to the notch in any case. Between patients with versus those without a notch, there was no statistically significant difference in age, sex, subjacent subcortical osteosclerosis, ankle joint effusion, osteochondral lesions elsewhere in the ankle, or subchondral bone marrow edema at the tibial plafond. CONCLUSION. The notch of Harty can be observed as an anatomic variant on MRI and should be differentiated from a traumatic osteochondral lesion.",
keywords = "Ankle, MRI, Normal variation, Osteochondral lesion",
author = "Boutin, {Robert D} and Jennifer Chang and Cyrus Bateni and Eric Giza and Wisner, {Erik R} and Lawrence Yao",
year = "2015",
month = "8",
day = "1",
doi = "10.2214/AJR.14.14012",
language = "English (US)",
volume = "205",
pages = "358--363",
journal = "American Journal of Roentgenology",
issn = "0361-803X",
publisher = "American Roentgen Ray Society",
number = "2",

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TY - JOUR

T1 - The notch of harty (pseudodefect of the tibial plafond)

T2 - Frequency and characteristic findings at MRI of the ankle

AU - Boutin, Robert D

AU - Chang, Jennifer

AU - Bateni, Cyrus

AU - Giza, Eric

AU - Wisner, Erik R

AU - Yao, Lawrence

PY - 2015/8/1

Y1 - 2015/8/1

N2 - OBJECTIVE. The purpose of this study is to report the frequency and characteristic findings of the notch of Harty as seen on MRI. MATERIALS AND METHODS. One hundred six consecutive ankle MRI studies performed at 1.5 or 3 T were reviewed retrospectively by two radiologists. Findings relating to the notch of Harty and ankle joint were recorded and analyzed, including qualitative assessment of the presence of the notch, focal chondral thinning or focal subcortical osteosclerosis at the notch, notch width and depth, osteochondral lesions elsewhere in the ankle, subchondral edema signal or cystic change at the tibial plafond, and the presence of an ankle joint effusion. RESULTS. The study group of 106 patients consisted of 48 Male and 58 feMale patients, with a mean age of 44.5 years (SD, 17.5 years). The notch was identified in 48 of 106 patients (45%) (24 Male and 24 feMale patients; mean age, 43.1 years; range, 7-79 years). When present, the notch averaged 6.2 mm (SD, 1.6 mm) in width and 1.2 mm (SD, 0.5 mm) in depth. The notch was graded as prominent in six of the 106 ankle MRI examinations (6%). Subchondral edemalike signal or cystic change was not localized to the notch in any case. Between patients with versus those without a notch, there was no statistically significant difference in age, sex, subjacent subcortical osteosclerosis, ankle joint effusion, osteochondral lesions elsewhere in the ankle, or subchondral bone marrow edema at the tibial plafond. CONCLUSION. The notch of Harty can be observed as an anatomic variant on MRI and should be differentiated from a traumatic osteochondral lesion.

AB - OBJECTIVE. The purpose of this study is to report the frequency and characteristic findings of the notch of Harty as seen on MRI. MATERIALS AND METHODS. One hundred six consecutive ankle MRI studies performed at 1.5 or 3 T were reviewed retrospectively by two radiologists. Findings relating to the notch of Harty and ankle joint were recorded and analyzed, including qualitative assessment of the presence of the notch, focal chondral thinning or focal subcortical osteosclerosis at the notch, notch width and depth, osteochondral lesions elsewhere in the ankle, subchondral edema signal or cystic change at the tibial plafond, and the presence of an ankle joint effusion. RESULTS. The study group of 106 patients consisted of 48 Male and 58 feMale patients, with a mean age of 44.5 years (SD, 17.5 years). The notch was identified in 48 of 106 patients (45%) (24 Male and 24 feMale patients; mean age, 43.1 years; range, 7-79 years). When present, the notch averaged 6.2 mm (SD, 1.6 mm) in width and 1.2 mm (SD, 0.5 mm) in depth. The notch was graded as prominent in six of the 106 ankle MRI examinations (6%). Subchondral edemalike signal or cystic change was not localized to the notch in any case. Between patients with versus those without a notch, there was no statistically significant difference in age, sex, subjacent subcortical osteosclerosis, ankle joint effusion, osteochondral lesions elsewhere in the ankle, or subchondral bone marrow edema at the tibial plafond. CONCLUSION. The notch of Harty can be observed as an anatomic variant on MRI and should be differentiated from a traumatic osteochondral lesion.

KW - Ankle

KW - MRI

KW - Normal variation

KW - Osteochondral lesion

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U2 - 10.2214/AJR.14.14012

DO - 10.2214/AJR.14.14012

M3 - Article

VL - 205

SP - 358

EP - 363

JO - American Journal of Roentgenology

JF - American Journal of Roentgenology

SN - 0361-803X

IS - 2

ER -