Histopathological abnormalities in painful bipartite patellae in adolescents

The Knee
Yoshikazu OohashiMasaru Fukuda

Abstract

The purpose of this study was to clarify the etiology of painful bipartite patella in adolescents by histopathological examination of excised specimens. We performed excision of a fragment of painful bipartite or tripartite patella from six patients (six knees). The articular cartilage, interposed tissue, bone, and bone marrow of the excised specimens were histologically examined. The articular cartilage was intact in all but two patellae. The predominant composition of the interposed tissue was fibrous tissue in one patient; fibrous tissue and fibrocartilage in four patients; and fibrous tissue, fibrocartilage, and hyaline cartilage in one patient. In the interposed tissue, diffuse degenerative and necrotic fibrocartilage was observed in four patients and focal necrotic fibrocartilage was seen in two patients. In all patients, the central region of the interposed tissue almost completely lacked blood vessels. Other histological features of the interposed tissue included necrosis of the trabecular bone in three patients, irregularly shaped spicules of immature bone in three patients, and fragments of hyaline cartilage in two patients. In all patients the bone marrow adjacent to the interposed tissue showed numerous small blood ...Continue Reading

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Citations

Apr 6, 2007·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Yoshikazu Oohashi, Tomihisa Koshino
Jan 30, 2010·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Yoshikazu OohashiYoshinori Oohashi
Mar 17, 2011·Archives of Orthopaedic and Trauma Surgery·Yoshikazu Oohashi, Yoshinori Oohashi
Apr 28, 2010·Orthopedics·Rajinder Singh GaheerMartin Rysavy
Feb 18, 2014·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Yoshikazu Oohashi
Jul 9, 2008·Clinical Orthopaedics and Related Research·Maria WeckströmHarri K Pihlajamäki
May 10, 2018·Acta orthopaedica et traumatologica turcica·Jung Ho Noh, Young Hak Roh
Feb 17, 2017·Journal of Forensic Sciences·Jingyuan MaShanzhi Gu
Oct 3, 2019·Magnetic Resonance Imaging Clinics of North America·Héloïse LerissonNathalie Boutry
May 28, 2021·Journal of Children's Orthopaedics·Naomi E GadinskyLionel E Lazaro

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