The dorsal defect of the patella

Haswell, David; Berne, Alfred S.; Graham, C. Benjamin

doi:10.1007/bf02461532

Cited by 29 publications

(32 citation statements)

References 12 publications

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“…Osteochondritis dissecans (OD) is located on the intercondylar ridge of the patella rather than the superior lateral aspect. Also, DDP often shows spontaneous healing while OD does not [4].…”

Section: Discussionmentioning

confidence: 97%

“…Biopsy of DDP reveals nonspecific repair without inflammation [4]. Microscopic exam reveals viable spicules of bone separated by fibrous tissue.…”

Section: Discussionmentioning

confidence: 99%

“…Radiographicall3; DDP presents as a rounded, well defined, lucent lesion with sclerotic borders, always located along the superior lateral border of the patella, adjacent to the articular cartilage [4]. DDP may show increased activity on bone scan, especially in symptomatic patients [1,2].…”

Section: Discussionmentioning

confidence: 99%

“…Review of the literature reveals a diverse variety of bony lesions of the patella, including dorsal defect of the patella (DDP) [1][2][3][4], chondroblastoma, osteoblastoma, aneurysmal bone cyst, osteoid osteoma, lymphoma, hemangioma, cystic tuberculosis, osteomyelitis, osteogenic sarcoma, metastatic lesions, intraosseous ganglion cyst, unicameral bone cyst, eosinophilic granuloma, osteochrondritis dissecans, giant cell tumor, and one case of Brodie's abcess [5].…”

Section: Discussionmentioning

confidence: 99%

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Dorsal defect of the patella and infection

1987

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Abstract. Lesions of the patella are relatively rare, although a large variety of etiologies have been reported. To our knowledge this is only the second reported case of a Brodie's abcess of the patella. Its radiologic appearance was identical to that described for the common dorsal defect of the patella. Case reportThis 13-year-old white female initially presented with bilateral knee pain, associated with regular athletics. After a regimen of quadriceps conditioning exercises, she returned to competitive basketball.One month later she developed a spontaneous left knee effusion. The knee examination revealed a moderate effusion with patello-femoral crepitus, no erythema or warmth and a full range of motion.Plain films (Figs. 1, 2) of the knee revealed a well defined, rounded, one centimeter lyric lesion in the upper lateral aspect of the patella. The lesion had a sclerotic border and abutted the dorsal articular surface of the patella. The triple phase bone scan showed increased activity in the flow, blood pool, and delayed images (Fig. 3). The remainder of the skeleton was normal. The sedimentation rate and white blood cell count were normal.Since symptoms did not resolve over several weeks, the family requested diagnostic surgery. A large suprapatellar plica was arthroscopically lysed but no other intra-articular abnormalities were seen. An open biopsy revealed a cystic cavity. Serous contents were cultured and the soft tissue lining membrane curetted to viable bone. The arthroscopic synovial biopsy showed chronic inflammation but cultures of the cyst remained negative. Her symptoms completely resolved after three weeks of empirical anti-staphylococcal antibiotics.

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Section: Discussionmentioning

confidence: 97%

“…Biopsy of DDP reveals nonspecific repair without inflammation [4]. Microscopic exam reveals viable spicules of bone separated by fibrous tissue.…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Dorsal defect of the patella and infection

1987

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“…Plain radiographs routinely show a rounded lesion surrounded by sclerotic bone, located at the superolateral region of the patella abutting against the articular cartilage [5][6][7]. Computed tomography shows that the subchondral defect is replaced by soft tissue isodense to surrounding cartilage.…”

Section: Introductionmentioning

confidence: 99%

Dorsal defect of the patella with fracture in a teenager

Villas

Pons-Villanueva

2010

Musculoskelet Surg

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We report the case of a young boy who presented a dorsal defect of the patella (DDP) with fracture after a small sport trauma. The patient's parents (professional of health care) had been warned on a possible tumoral disease in a previous consultation and claimed for an accurate diagnosis. Although fracture is rarely reported in DDP, the radiographic image strongly suggested this condition; nevertheless, the diagnosis accuracy requested by the parents lead to indicate a biopsy that showed irregular fragments of laminar bone and hyaline cartilage islands similar to articular cartilage compatible with a non-specific developmental ossification defect. The lytic defect was filled with morselized cancellous bone graft, the fracture having a normal consolidation. With a follow-up of 4 years, the patient is asymptomatic, and the radiological morphology of the patella is normal. Although DDP is accepted to be a radiologically well-defined condition, images may perhaps not get accuracy enough for diagnosis and biopsy may be indicated by clinical and radiological features different than the typical ones. Although fracture is rarely reported in case of DDP, it has not to be considered as indicative of tumor or malignancy.

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Brodie's Abscess of the Patella

Miller¹

1977

JAMA

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The dorsal defect of the patella

Cited by 29 publications

References 12 publications

Dorsal defect of the patella and infection

Dorsal defect of the patella and infection

Dorsal defect of the patella with fracture in a teenager

Brodie's Abscess of the Patella

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