Morphological variants of lateral meniscus of the knee

A cadaveric study in South Indian human fetuses

B. V. Murlimanju, Narga Nair, Biswabina Ray, Mangala M. Pai, Soumya Amin, Shakuntala R. Pai

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In the present study, the objectives were to study the morphology of the lateral menisci (LMs) in human fetuses from a South Indian population and to verify the developmental etiology of the discoid lateral meniscus (DLM). The study included 106 fetal knee joints which were fixed in 10% formalin. After dissecting the joints, the morphological variants of the shapes of the LMs were macroscopically noted and classified as discoid and nondiscoid. The nondiscoids were subdivided into C-shaped and crescentic. The discoid lateral menisci (DLMs) were divided into complete and incomplete discoid. From our observations, 82.1% of the LMs were found to be nondiscoid. Among them, 62.3% were C-shaped and 19.8% were crescentic. The remaining 17.9% of the LMs had a discoid shape, and among these, 14.1% were incomplete discoid and 3.8% were completely discoid. Bilaterality of the discoid shape was observed in 26.6% of the cases. There was a female preponderance (11:8) among LMs with discoid morphology. In conclusion, the prevalence of DLM according to the present study was estimated as 17.9%. Our findings favor Kaplan's theory, as the majority of the fetuses of various gestational ages had nondiscoid LMs. Even the youngest fetus (CRL 88 mm, 14 weeks of gestation) exhibited a lateral tibial plateau that was incompletely covered by the meniscus, which did not exhibit a discoid shape. We believe that the DLM is anomalous and arises through variant morphogenesis.

Original languageEnglish
Pages (from-to)63-68
Number of pages6
JournalAnatomical Science International
Volume86
Issue number2
DOIs
Publication statusPublished - 06-2011

Fingerprint

Tibial Meniscus
Knee
Fetus
Knee Joint
Morphogenesis
Formaldehyde
Gestational Age
Joints

All Science Journal Classification (ASJC) codes

  • Anatomy

Cite this

@article{879dbd18cc5446cfb8bfd0817a04da13,
title = "Morphological variants of lateral meniscus of the knee: A cadaveric study in South Indian human fetuses",
abstract = "In the present study, the objectives were to study the morphology of the lateral menisci (LMs) in human fetuses from a South Indian population and to verify the developmental etiology of the discoid lateral meniscus (DLM). The study included 106 fetal knee joints which were fixed in 10{\%} formalin. After dissecting the joints, the morphological variants of the shapes of the LMs were macroscopically noted and classified as discoid and nondiscoid. The nondiscoids were subdivided into C-shaped and crescentic. The discoid lateral menisci (DLMs) were divided into complete and incomplete discoid. From our observations, 82.1{\%} of the LMs were found to be nondiscoid. Among them, 62.3{\%} were C-shaped and 19.8{\%} were crescentic. The remaining 17.9{\%} of the LMs had a discoid shape, and among these, 14.1{\%} were incomplete discoid and 3.8{\%} were completely discoid. Bilaterality of the discoid shape was observed in 26.6{\%} of the cases. There was a female preponderance (11:8) among LMs with discoid morphology. In conclusion, the prevalence of DLM according to the present study was estimated as 17.9{\%}. Our findings favor Kaplan's theory, as the majority of the fetuses of various gestational ages had nondiscoid LMs. Even the youngest fetus (CRL 88 mm, 14 weeks of gestation) exhibited a lateral tibial plateau that was incompletely covered by the meniscus, which did not exhibit a discoid shape. We believe that the DLM is anomalous and arises through variant morphogenesis.",
author = "Murlimanju, {B. V.} and Narga Nair and Biswabina Ray and Pai, {Mangala M.} and Soumya Amin and Pai, {Shakuntala R.}",
year = "2011",
month = "6",
doi = "10.1007/s12565-010-0088-0",
language = "English",
volume = "86",
pages = "63--68",
journal = "Anatomical Science International",
issn = "1447-6959",
publisher = "American Orthopsychiatric Association Inc.",
number = "2",

}

Morphological variants of lateral meniscus of the knee : A cadaveric study in South Indian human fetuses. / Murlimanju, B. V.; Nair, Narga; Ray, Biswabina; Pai, Mangala M.; Amin, Soumya; Pai, Shakuntala R.

In: Anatomical Science International, Vol. 86, No. 2, 06.2011, p. 63-68.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Morphological variants of lateral meniscus of the knee

T2 - A cadaveric study in South Indian human fetuses

AU - Murlimanju, B. V.

AU - Nair, Narga

AU - Ray, Biswabina

AU - Pai, Mangala M.

AU - Amin, Soumya

AU - Pai, Shakuntala R.

PY - 2011/6

Y1 - 2011/6

N2 - In the present study, the objectives were to study the morphology of the lateral menisci (LMs) in human fetuses from a South Indian population and to verify the developmental etiology of the discoid lateral meniscus (DLM). The study included 106 fetal knee joints which were fixed in 10% formalin. After dissecting the joints, the morphological variants of the shapes of the LMs were macroscopically noted and classified as discoid and nondiscoid. The nondiscoids were subdivided into C-shaped and crescentic. The discoid lateral menisci (DLMs) were divided into complete and incomplete discoid. From our observations, 82.1% of the LMs were found to be nondiscoid. Among them, 62.3% were C-shaped and 19.8% were crescentic. The remaining 17.9% of the LMs had a discoid shape, and among these, 14.1% were incomplete discoid and 3.8% were completely discoid. Bilaterality of the discoid shape was observed in 26.6% of the cases. There was a female preponderance (11:8) among LMs with discoid morphology. In conclusion, the prevalence of DLM according to the present study was estimated as 17.9%. Our findings favor Kaplan's theory, as the majority of the fetuses of various gestational ages had nondiscoid LMs. Even the youngest fetus (CRL 88 mm, 14 weeks of gestation) exhibited a lateral tibial plateau that was incompletely covered by the meniscus, which did not exhibit a discoid shape. We believe that the DLM is anomalous and arises through variant morphogenesis.

AB - In the present study, the objectives were to study the morphology of the lateral menisci (LMs) in human fetuses from a South Indian population and to verify the developmental etiology of the discoid lateral meniscus (DLM). The study included 106 fetal knee joints which were fixed in 10% formalin. After dissecting the joints, the morphological variants of the shapes of the LMs were macroscopically noted and classified as discoid and nondiscoid. The nondiscoids were subdivided into C-shaped and crescentic. The discoid lateral menisci (DLMs) were divided into complete and incomplete discoid. From our observations, 82.1% of the LMs were found to be nondiscoid. Among them, 62.3% were C-shaped and 19.8% were crescentic. The remaining 17.9% of the LMs had a discoid shape, and among these, 14.1% were incomplete discoid and 3.8% were completely discoid. Bilaterality of the discoid shape was observed in 26.6% of the cases. There was a female preponderance (11:8) among LMs with discoid morphology. In conclusion, the prevalence of DLM according to the present study was estimated as 17.9%. Our findings favor Kaplan's theory, as the majority of the fetuses of various gestational ages had nondiscoid LMs. Even the youngest fetus (CRL 88 mm, 14 weeks of gestation) exhibited a lateral tibial plateau that was incompletely covered by the meniscus, which did not exhibit a discoid shape. We believe that the DLM is anomalous and arises through variant morphogenesis.

UR - http://www.scopus.com/inward/record.url?scp=79958029749&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79958029749&partnerID=8YFLogxK

U2 - 10.1007/s12565-010-0088-0

DO - 10.1007/s12565-010-0088-0

M3 - Article

VL - 86

SP - 63

EP - 68

JO - Anatomical Science International

JF - Anatomical Science International

SN - 1447-6959

IS - 2

ER -