Unfavorable Ankylosis - 2 Digits C&P Exam Prep

Fingertip-to-Proximal Transverse Palm Crease Gap

What it measures: The distance in centimeters (or inches) between the fingertip and the proximal transverse crease of the palm when the ankylosed finger is flexed to the maximum extent possible. This is the primary determinant of favorable versus unfavorable ankylosis for index, long, ring, and little fingers.

What to expect: The examiner will ask you to attempt to flex the ankylosed finger(s) as much as possible toward your palm. They will measure the gap between the tip of the ankylosed finger and the proximal palm crease using a ruler or tape measure. Perform this on your worst day or as close to it as possible - do not push beyond what your condition normally allows.

Pain considerations: If attempting to flex the ankylosed finger causes pain, verbally report this immediately. Pain on motion is a DeLuca factor and must be documented. Do not silently tolerate pain during the measurement.

Thumb Pad Opposition Gap (for thumb involvement)

What it measures: For thumb ankylosis: the distance between the thumb pad and the fingers when the thumb attempts to oppose the fingers. Determines favorable vs. unfavorable ankylosis of the thumb under DC 5219.

What to expect: If your thumb is one of the two ankylosed digits, the examiner will ask you to attempt to touch your thumb pad to your fingers. The gap between the thumb pad and the closest finger will be measured.

Pain considerations: Pain during opposition attempt should be verbally reported to the examiner. This is a DeLuca factor that must be captured in the DBQ.

Active Range of Motion (ROM) - MCP, PIP, DIP, IP, CMC Joints

What it measures: The degrees of flexion and extension at each joint of each ankylosed digit (and adjacent digits). Used to document the fixed position of the ankylosed joint and any remaining motion in non-ankylosed joints. The examiner will record values in degrees for each joint.

What to expect: The examiner will observe you moving each finger joint through its full range of motion. For ankylosed joints, the range will be zero or near-zero in both flexion and extension. The examiner will also move the joint passively (passive ROM). Measurements may be taken at 0-, 70-, 90-, or 100- intervals as documented in the DBQ fields.

Pain considerations: Under DeLuca v. Brown, pain that limits motion must be documented. If the joint is painful to move, tell the examiner 'this motion causes [describe] pain.' The examiner should note objective evidence of pain such as facial grimacing, guarding, or verbal reports.

Grip Strength and Pinch Strength

What it measures: Measures the functional hand strength, which is directly impacted by digit ankylosis. Grip strength is measured by dynamometer (recorded in kg or lbs). Pinch strength assesses thumb-to-finger pinch force. These values support documentation of functional loss.

What to expect: You will be asked to squeeze a dynamometer or pinch gauge device. Perform this effort as you normally would - do not over-exert or under-perform. The examiner records right and left hand values and may compare them.

Pain considerations: Pain during grip testing should be verbally reported and is a DeLuca factor (pain on use). Weakness from pain must be distinguished from weakness from structural limitation.

Joint Position and Angulation/Rotation Assessment

What it measures: The examiner will document the fixed position of each ankylosed joint (the degree of flexion or extension at which it is locked), and whether any abnormal angulation or rotation of the digit bones is present. Angulation or rotation of a bone automatically upgrades ankylosis to the amputation-equivalent rating level.

What to expect: The examiner will visually inspect and manually assess the fixed position of the ankylosed joint. They may use a goniometer to measure the angle. They will note whether the joint is fixed in a neutral (0-), flexed, or extended position, and whether the bone is rotated or angulated.

Pain considerations: Angulation and rotation can cause chronic pain, nerve compression, and compensatory strain in adjacent digits - describe all associated symptoms.

40%

Unfavorable ankylosis of the thumb AND any one finger of the same hand, dominant hand. The thumb must have either: (1) CMC or IP joint ankylosed with thumb pad-to-finger gap >2 inches, OR (2) both CMC and IP joints ankylosed. The affected finger must have MCP or PIP joint ankylosed with fingertip-to-palm crease gap >2 inches, or both MCP and PIP joints ankylosed.

From 38 CFR: 38 CFR 4.71a DC 5219: Thumb and any finger, unfavorable ankylosis - 40% (dominant) / 30% (non-dominant). Both the thumb and one finger must independently meet the unfavorable ankylosis standard.

30%

Meets one of two criteria: (A) Unfavorable ankylosis of the thumb AND any one finger of the same hand, NON-dominant hand. OR (B) Unfavorable ankylosis of the index finger AND the long finger, OR index and ring finger, OR index and little finger of the same hand, dominant hand. Gap >2 inches or both MCP/PIP of same digit ankylosed for each affected digit.

From 38 CFR: 38 CFR 4.71a DC 5219: Index and long; index and ring; or index and little fingers, unfavorable ankylosis - 30% (dominant) / 20% (non-dominant). Also: Thumb and any finger, non-dominant hand - 30%.

20%

Meets one of two criteria: (A) Unfavorable ankylosis of index + long, index + ring, or index + little fingers of the non-dominant hand. OR (B) Unfavorable ankylosis of the long and ring finger; long and little finger; or ring and little finger of the same hand (either dominant or non-dominant). Gap >2 inches fingertip-to-palm crease, or both MCP and PIP of same digit ankylosed.

From 38 CFR: 38 CFR 4.71a DC 5219: Long and ring; long and little; or ring and little fingers, unfavorable ankylosis - 20% (both dominant and non-dominant). Also: Index and long/ring/little, non-dominant - 20%.

Pain

How to describe it: Describe the location (specific joint - e.g., 'the PIP joint of my index finger'), quality (aching, throbbing, sharp, burning), severity on a 0-10 scale, triggers (gripping, cold weather, repetitive use), and duration. Distinguish between pain at rest and pain with movement.

Example: On my worst days, the pain in my ankylosed index and long finger joints is a constant 7/10 aching that spikes to 9/10 when I try to grip anything. Even the weight of holding a coffee cup sends shooting pain through those joints. I wake up in the morning with throbbing pain that takes over an hour to settle down, and it wakes me at night when I accidentally roll onto that hand.

Examiner listens for: Objective evidence of painful motion (facial grimacing, guarding), pain on palpation of the joint, pain that limits active ROM versus passive ROM, pain that increases with repetitive use or during flare-ups.

Avoid: Do not say 'it's manageable' or 'I just deal with it.' Do not minimize pain to appear stoic. If you take medication for the pain, mention it. If the pain limits your work or daily activities, describe those specific limitations.

Functional Loss - Grip and Pinch

How to describe it: Describe specific tasks you cannot perform or can only perform with great difficulty: buttoning shirts, opening jars, typing, writing, using tools, carrying bags, shaking hands. Quantify where possible (e.g., 'I can only type for 10 minutes before pain forces me to stop').

Example: I cannot button the buttons on my shirt with my right hand anymore. I drop things regularly because I cannot grip them properly with two fingers locked. I cannot use a pen for more than a few minutes. I had to change jobs because I could not operate hand tools that required a full grip.

Examiner listens for: Specific activities impaired, frequency of drop episodes, adaptations made, whether dominant or non-dominant hand is affected, impact on employment and ADLs.

Avoid: Do not describe only the physical limitation of the joint itself - describe what that limitation prevents you from DOING. Do not say 'I've adapted' without explaining what the adaptation required (e.g., moving tasks to the other hand, purchasing special tools).

Flare-Ups

How to describe it: Describe what triggers flare-ups (cold, humidity, overuse, stress), how often they occur, how long they last, what symptoms increase during a flare-up (increased pain, swelling, stiffness, further loss of motion), and how flare-ups impact your ability to function during those periods.

Example: About three times per month I have flare-ups lasting 2-4 days where the stiffness worsens and the gap between my finger and palm increases noticeably - I literally cannot get my fingers any closer to my palm. Swelling increases noticeably, and I cannot use my hand for fine motor tasks at all during these periods. Cold weather triggers flare-ups every time.

Examiner listens for: The examiner must document flare-up frequency, duration, and impact on ROM and function per M21-1 and DeLuca requirements. They are listening for whether flare-ups cause additional functional loss that approaches or achieves functional equivalence of ankylosis.

Avoid: Do not skip describing flare-ups because the exam day happened to be a relatively good day. Explicitly state 'today is not my worst day' if applicable. The DBQ has a specific field for flare-up description that must be populated.

Fatigue and Lack of Endurance

How to describe it: Describe how quickly your hand fatigues with use, how that compares to before your condition, and what activities trigger fatigue. Explain that even activities that don't cause immediate pain will cause fatigue and degraded function with sustained or repetitive use.

Example: After gripping for more than five minutes continuously - such as when I'm driving - my hand becomes fatigued and I lose much of what little grip I have. By the end of a workday involving any hand use, my hand is essentially non-functional for fine motor tasks. I have to stop and rest my hand every 15 minutes during any task requiring grip.

Examiner listens for: Fatigability is an explicit DeLuca factor and a DBQ checkbox item. The examiner should note whether use over time results in additional functional loss beyond what is seen at the initial ROM measurement.

Avoid: Do not imply that fatigue is normal aging or unrelated to the condition. If your hand fatigues faster than your other hand or faster than before your injury/condition, that difference is directly attributable to the ankylosis.

Weakness and Incoordination

How to describe it: Describe any difficulty with fine motor control, dropping objects, inability to perform precise tasks (threading a needle, picking up coins), and any feeling of weakness in the affected digits or hand as a whole.

Example: I regularly drop small objects like utensils and pens because I cannot coordinate my ankylosed fingers with the others. I cannot pick up coins off a flat surface. My handwriting has deteriorated significantly because I cannot control the pen. I have knocked over glasses and cups because my grip coordination is unreliable.

Examiner listens for: Incoordination and weakness are explicit DeLuca factors with dedicated DBQ checkboxes. The examiner should document whether incoordination is observed during the physical exam or reported by history.

Avoid: Do not attribute incoordination solely to other conditions without noting how the ankylosed digits contribute. Even if the joint is fixed, the restriction of normal joint mechanics causes compensatory incoordination in the entire hand.

Daily and Occupational Impact

How to describe it: Describe specific occupational tasks you cannot perform (military occupational duties if still relevant, current job duties, or inability to maintain prior employment). Describe ADL impacts: personal hygiene, meal preparation, driving, home maintenance. Quantify the time or frequency of interference.

Example: My ankylosed fingers prevent me from performing the manual labor tasks my job requires. I was transferred to a desk position because I could not safely use hand tools. I cannot do home repairs myself and must hire help. I cannot play with my children the way I used to. On bad days I struggle with basic personal hygiene tasks.

Examiner listens for: Section 8 of the DBQ (functioning) asks specifically about how the condition impacts daily functioning. The examiner needs concrete examples, not generalizations.

Avoid: Do not limit your description to physical symptoms. Functional and occupational impact is independently considered in the DBQ and can influence the overall disability picture.