Following repeated pregnancy losses, I had an indeterminate result on an Antiphospholipid Syndrome Assessment (all normal except ACL IgM = 13, cut off for normal is 12). My understanding is that results below the 95 percentile are negative, above the 99th are "positive / high." Results between the 95th-99th fall in this "indeterminate range" and require retesting.
I was retested. This time ACL IgM was normal, but the aPTT and hexagonal phase phospholipid (other metrics on the assessment) were abnormal. The aPTT = 41.2, ref interval 23.4-36.4, and hexagonal phase phospholipid = 12.7, ref interval 0 - 8). This was a "definitive positive" (not just indeterminate like the last one). But (of course) I would need two positive results 12 weeks apart for a diagnosis. The initial indeterminate result doesn't count towards that. We are retesting to see if results are persistently abnormal - but can't do that for 10 more weeks.
The Assessment guidelines say that only *persistent* lupus anticoagulants or APL antibodies are associated with increased risk. Does the same factor need to be positive twice, or does the panel need to come back with positive results (but not necessarily the same factor twice)? In other words, do I need two times with positive lupus anticoagulant, or does one time with positive APL antibodies and one time with lupus anticoagulant count?
(on an unrelated note, I have had borderline autoimmune results for years. My ANA was positive a while back and they thought it was potentially lupus, but then it was negative again. I have persistent joint pain, and a facial rash may be rosecea or malar rash, but hasn't responded to metrogel treatment for rosecea. i have an appointment with a rheumatologist, but it isn't until August, at which point they will probably run more tests, but I'm guessing won't figure out what is going on with that).