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MRI · Dorsal/ulnar superficial soft tissue mass

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Result summary

16 findings in this reading

Severity reflects the AI reading's own wording — it is not a diagnosis, and not your radiologist's opinion.

New or worsening symptoms? Contact your doctor promptly, whatever this summary says.

Findings

  • Dorsal/ulnar superficial soft tissue mass

    high confidence
    Needs attention

    A rounded, sharply marginated structure of homogeneous high signal sits in the subcutaneous soft tissue overlying the carpus, measuring roughly 1.5 cm across. It is sharply separated from the adjacent muscle and fat and lies against the superficial soft tissues without extending into bone on these slices. This is the most significant finding of this series because it is a discrete, well-defined soft-tissue structure that stands out distinctly from all surrounding tissue, whereas the remaining structures retain their expected appearance.

  • Midcarpal / radiocarpal joint space

    moderate confidence
    Needs attention

    A thin, well-defined linear band of high (fluid) signal lies between the proximal and distal carpal rows and at the radiocarpal articulation, slightly wider than the adjacent intercarpal clefts. This is the most conspicuous finding on this series; it outranks the marrow findings because it represents a focal change in a joint space rather than normal variation. It does not displace or deform the adjacent carpal bones.

  • Mid-row carpal bone marrow

    low confidence
    Needs attention

    One mid-carpal bone shows a slightly heterogeneous, mottled intermediate-to-high signal within its marrow compared with the more uniformly bright fatty marrow of the neighbouring carpal bones, with its cortical outline remaining continuous along the traced margin.

  • Dorsal soft tissues / extensor compartment

    low confidence
    Needs attention

    On the mid and distal slices a thin intermediate-signal layer surrounds several of the rounded dark extensor tendons over the metacarpals; the tendons themselves remain uniformly low in signal and rounded, with the adjacent subcutaneous fat preserved. This is the most conspicuous soft-tissue difference on this series, but no tendon discontinuity is shown.

  • Distal forearm soft tissue (dorsal/volar), peripheral slices

    low confidence
    Needs attention

    A smooth, well-marginated rounded structure of low-to-intermediate signal sits within the soft tissue envelope of the distal forearm on the most lateral slices, distinct from the brighter surrounding muscle and clearly separated from the bone.

  • Longitudinal tubular structure, distal forearm

    moderate confidence
    Needs attention

    An elongated, uniformly fluid-bright band runs vertically through the distal forearm soft tissues on the mid-lateral slices, tapering distally and consistent in signal with a flow/fluid channel, contrasting sharply with the suppressed fat around it.

  • Ulnar-sided extensor tendon sheath

    moderate confidence
    Needs attention

    A rounded dark tendon on the ulnar/dorsal aspect is surrounded by a thin rim of bright fluid signal, the fluid collar wider than the tendon itself, over several consecutive mid slices. This encircling fluid is the most significant finding on these slices because it indicates active fluid around a tendon sheath rather than a static well-defined structure.

  • Distal radioulnar interval

    moderate confidence
    Needs attention

    Bright fluid signal sits in the cleft between the two large marrow-containing bones on the proximal slices, widening the space between the distal radius and distal ulna compared with the smooth fat elsewhere.

  • Ulnar-side soft tissue / triangular fibrocartilage region

    moderate confidence
    Needs attention

    Bright fluid-like signal fills the interval between the distal ulna and the ulnar carpus, extending along the dorsal-ulnar soft tissues on the dorsal slices. The normally low-signal fibrocartilage/ligament band in this interval is replaced by high signal. This is the most significant finding of this series because it represents a focal change at the symptomatic ulnar side, outranking the uniformly dark, smoothly marginated carpal bones which show no cortical interruption.

  • Soft tissue of the ulnar-side wrist region shown

    moderate confidence
    Needs attention

    Within an oval region of intermediate signal in the lower-central part of the first slice there is a branching, forked linear focus of bright (fluid-like) high signal standing out against the darker surrounding tissue. It is the most conspicuous finding of this series, being the only discrete signal abnormality against an otherwise low-signal background, and marks fluid-bright signal tracking along a cleft between structures.

  • No abnormality seen

    moderate confidence · not localized
    Normal

    On these axial slices, no abnormality was seen in: the marrow signal of the distal radius and ulna, the carpal bones imaged through the proximal and distal rows, the traced cortical outlines of these bones, and the volar soft tissues. This entry records structures examined without a definite abnormality and is not a statement that they are normal.

  • Distal radioulnar region

    low confidence
    Normal

    On the proximal slices the ulna (the smaller rounded bone) and radius (the larger bone) sit side by side with a narrow intervening space; the bones are aligned and both show uniform bright marrow, with no step or widening evident on these slices.

  • Carpal bones (proximal and distal rows)

    low confidence
    Normal

    The rounded carpal bones show uniformly low marrow signal on this fat-suppressed sequence with smooth cortical margins; no step or focal bright marrow signal is seen across the slices shown.

  • No abnormality seen

    moderate confidence · not localized
    Normal

    On these two slices the great majority of each frame is uniform dark signal with fine background speckle; the second slice (coronal 22/22) shows no discernible anatomy at all. No carpal bone, distal radius, distal ulna, triangular fibrocartilage region, tendon, or joint surface could be individually traced on these slices, so no structure-specific abnormality could be assessed.

  • Upper right corner focus (coronal 21/22)

    low confidence

    A small rounded patch of higher signal sits at the top-right edge of the image, separate from the central soft-tissue region and without a definable margin or internal structure.

  • Second slice (coronal 22/22)

    high confidence

    This slice is almost uniformly dark, composed predominantly of background noise with only a faint ill-defined grey patch in the lower-central area; no discrete bony or soft-tissue structure is resolvable here.

Read Your Scan

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Read Your Scan

AI scan explanation service

Web: www.readyourscan.com

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Issued: 2026-10-24

Patient:
—
Exam no.:
—
Archive:
C2E67593
Exam date:
—
Examination:
MRI

This document was generated by artificial intelligence from the scan images. It is an explanatory aid, NOT a diagnosis and NOT a substitute for a radiologist report. Always discuss it with your doctor.

MRI

Whole-exam read: 6 of 13 series, 160 representative slices in total.

Findings

  • 1.Possible soft-tissue lump: One reading described a round, sharply outlined structure about 1.5 cm across in the soft tissue just under the skin over the wrist (back/pinky side), separate from muscle and not reaching into bone. One of the other readings also saw it and another did not, so this is not settled and would need a radiologist to confirm.
  • 2.Fluid around an ulnar-side extensor tendon sheath: One reading, with support from one other, described a thin collar of fluid-like signal wrapping around a tendon on the pinky/back side of the wrist, wider than the tendon itself, over several images. Fluid around a tendon sheath can suggest irritation there. This is reported but not fully settled.
  • 3.Ulnar-side (triangular fibrocartilage) region: All of the independent readings agreed on this one. There is bright fluid-like signal filling the space between the end of the forearm bone (ulna) and the pinky-side wrist bones, and the normally dark band of cartilage/ligament tissue in that gap appears replaced by this bright signal. This sits exactly where you describe pain.
  • 4.Two dark/underexposed coronal images: All readings agreed that two of the pictures were mostly dark, so no individual bone, joint, cartilage, or tendon could be traced on them and no finding could be judged there.
  • 5.Joint-space fluid (midcarpal/radiocarpal): One reading described a thin band of fluid-like signal between the two rows of small wrist bones and at the wrist joint, slightly wider than normal, without pushing the bones out of place. Another reading of the same images reached the opposite conclusion, so this disagreement needs a radiologist to settle.
  • 6.Mid-row wrist bone marrow: One reading described slightly uneven, mottled signal inside one of the middle wrist bones (with its outer shell still continuous), while another reading disagreed. This point is unresolved and needs a radiologist.
  • 7.Wrist bones on the fat-suppressed images: One reading reported the wrist bones looked uniform with smooth edges and no step or bright patch, while another reading of the same images disagreed. This is unresolved and needs a radiologist.
  • 8.Branching fluid-like focus on the ulnar side: One reading described a small forked streak of bright fluid-like signal tracking along a gap between structures on the pinky side; another reading disagreed about it. This point is unresolved and needs a radiologist.
  • 9.Axial images, structures examined: On the cross-section images, one reading did not find anything abnormal in the marrow of the forearm bones (radius and ulna), the small wrist bones, the outer outlines of those bones, or the palm-side soft tissues. Another reading of the same images came to the opposite conclusion, so this disagreement needs a radiologist to settle.
  • 10.Fluid in the gap between the two forearm bones (distal radioulnar): One reading described bright fluid-like signal sitting in and widening the cleft between the ends of the two forearm bones. The other readings did not describe this, so it is reported but not settled.
  • 11.Small patch at the corner of one image: One reading, with support from one other, noted a small rounded brighter patch at the top-right edge of one picture, with no clear border or internal detail.
  • 12.Thin layer around the back-of-hand tendons: One reading only described a thin layer of signal around some of the extensor tendons over the hand bones, with the tendons themselves still intact and the fat around them preserved. The other readings did not mention this.
  • 13.Alignment of the two forearm bones: One reading only noted that the forearm bones (radius and ulna) sat side by side in line, with no step or widening, and did not find an abnormality there. The other readings did not comment on this.
  • 14.Rounded structure in the distal forearm: One reading only described a smooth, well-outlined rounded structure in the forearm soft tissue on the outer-edge images, separate from bone. The other readings did not mention it.
  • 15.Tube-like channel in the forearm: One reading only described a long, fluid-bright band running lengthwise through the forearm soft tissue, tapering at the lower end, in keeping with a fluid or flow channel. The other readings did not mention it.
  • 16.One further dark image: One reading only noted that one of the coronal pictures was almost completely dark with no identifiable structure. The other readings did not raise it separately.

Impression

This was an MRI (a scan that uses a magnetic field and radio waves, with no X-rays) of your wrist. Several readings were made of the same pictures, and they did not always agree, so some points below are described as unsettled and need a human radiologist to decide. The findings cluster on the pinky (ulnar) side of the wrist, where you describe pain, and mostly involve extra fluid-like signal around tendons and joint spaces; there is also a possible small lump under the skin that only some readings saw.

In general terms, several of the reported findings point to extra fluid-like signal on the pinky (ulnar) side of the wrist — around a tendon sheath and in the region of the triangular fibrocartilage, the small cushion of cartilage and ligament that helps stabilise that side of the wrist. Fluid in these areas can accompany irritation, overuse, or strain, and the location lines up with where you feel pain and with activities like typing and phone use. However, this report cannot tell you a cause or a diagnosis. Many of the points are unsettled because different readings of the same images disagreed, and one finding (the possible soft-tissue lump) was seen by some readings and not others. A human radiologist is needed to review the actual images and resolve these disagreements. It is also important to know this was an incomplete assessment: the positioning (localizer) images were not part of this reading, and two of the pictures were too dark to interpret, so these findings do not rule anything out. Because your symptoms have been getting worse over three weeks, it would be sensible to discuss these results with your doctor reasonably soon.

Produced by

Read Your Scan

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For the patient

Questions for your doctor

  • 1.Can a radiologist review the images to settle the points the readings disagreed on — the joint-space fluid, the wrist bone marrow, and the branching ulnar-side signal?
  • 2.Is the possible lump under the skin something that needs to be examined or imaged again to confirm whether it is really there?
  • 3.Does the fluid-like signal on the pinky side and around the tendon fit with my symptoms, and what could be causing it?
  • 4.Should the triangular fibrocartilage region, which all the readings flagged, be looked at more closely?
  • 5.Do I need a repeat or more complete scan, given that some images were too dark to read and the positioning images weren't included?
  • 6.Are there activity changes, supports, or next steps you'd suggest while this is being sorted out?

Glossary

MRI:
A scan that uses a strong magnet and radio waves to make detailed pictures of soft tissue and bone, without X-ray radiation.
Ulnar side:
The pinky-finger side of the wrist and forearm.
Fluid signal:
Areas that appear bright on these images in a way that looks like fluid; extra fluid can be a sign of irritation or inflammation, though it is not specific to one cause.
Tendon sheath:
The thin sleeve that surrounds a tendon (the cord that connects muscle to bone) and helps it glide; fluid can collect in it when the tendon is irritated.
Extensor tendons:
The tendons on the back of the hand and wrist that straighten the fingers and wrist.
Triangular fibrocartilage:
A small pad of cartilage and ligament on the pinky side of the wrist that cushions and stabilises the joint between the wrist bones and the forearm.
Carpal bones:
The eight small bones of the wrist, arranged in two rows.
Radius and ulna:
The two bones of the forearm; the radius is on the thumb side and the ulna on the pinky side.
Distal radioulnar:
The joint where the two forearm bones meet near the wrist.
Marrow:
The soft tissue inside bones; on MRI, healthy marrow usually looks bright because of its fat content.
Cortical outline:
The hard outer shell of a bone; a break in it would show as an interruption of that outline.
Volar:
The palm side of the hand or wrist.
Fat suppression:
An MRI setting that darkens fat so that fluid and other changes stand out more clearly.
Localizer:
Quick positioning images taken to set up the scan; these were not part of the detailed reading.

This is an automated, informational explanation of your imaging — not a medical diagnosis, and not a substitute for a licensed radiologist or your doctor. If you have urgent symptoms, seek medical care.

Document generated automatically by artificial intelligence. It carries no medical-legal value, is not signed by a physician and does not replace the radiology report issued by the facility that performed the exam.

Document no.: C2E67593 · Issued: 2026-10-24 10:11 UTC

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