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FIGURE 2
FIGURE 3
A. LT coalition of a girl, radiograph taken following a minor wrist injury, age 7y11m
A. LT coalition, girl who had a wrist radiograph taken because of a right thumb injury,
age 8y8m; B. LT coalition, girl who had a wrist radiograph taken because of a right thumb injury (4y previously), age 12y5m. LT, luno-triquetral
A. LT coalition, girl who sustained a Salter-Harris type II fracture of the distal radius and ulna,
age 13y5m; B. LT coalition, girl who sustained a Salter- Harris II fracture of the distal radius and ulna (2m previously), age 13y7m. LT, luno- triquetral
A
AB
FIGURE 4
AB
B. LT coalition of a girl, radiograph taken following a minor wrist injury (4 years previously), age 12y. LT, luno- triquetral
B
Apert syndrome, and one for the evaluation of Ellis-van Creveld syndrome. Table 1 presents summarized data on patients.
Luno-triquetral coalition
Case 1 is illustrative of LT coalition of both wrists (Figs.1A-E). This boy was evaluated for bilateral clinodactyly of the index and
Five sequential radiographs were taken thereafter. The bilateral radiographs at age 7 years 2 months show a reduction in the space between the lunate and triquetrum. There is also a similarity in the shape of the two borders, giving them the appearance of a “parallel cortex” of each other. In the next radiograph at chronological age
8 years 5 months, LT coalitions are observed bilaterally, with the 6 months, shows fully developed coalitions on both the left and right wrists (Fig.1E).
In case 2, a 7-year-11-month-old girl had a wrist radiograph taken following a minor wrist injury. It demonstrated elongated lunate and triquetral ossicles with decreased space between the bones. Another radiograph taken four years later clearly shows LT coalition (Figs. 2A-B).
Case 3 involves an 8-year-8-month-old girl who had a wrist radiograph taken because of a right thumb injury. It shows a decreased joint space between the lunate and triquetrum with radiograph (in which the wrist is clearly visible) showed a distinct LT coalition with a distal unfused notch (Figs. 3A-B).
Case 4 involves a girl who sustained a Salter-Harris type II
13 years 5 months of age, shows a decreased space with well-
A radiograph taken only two months later (13 years 7 months) shows near-complete fusion of the two bones with a small distal
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Del Med J | January/February 2019 | Vol. 91 | No. 1
