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Not sure why just answer sent this to neurology instead of ortho. First time using site - may have submitted incorrectly.
re. hard lump near tendon on hand, palm side between thumb and index finger for over a month
Hello. Welcome to Just Answer. I will try to answer your question. Orthopedics doesn't seem to have any experts, so they send them here. If you have a hard lump in the area between your index finger and thumb, on the palmar surface, I would ask if it is in close approximation to the index finger MCP joint? (metacarpophlangeal joint). The most common reason would be a synovial cyst. These are outpouchings of the synovial membrane of the joint and they contain synovial fluid. I will leave you a webpage on this subject, please review it and get back to me if you think it fits.
no it is halfway between the thumb and index finger and about an inch in from edge of hand. seems attached to thumb
well, it could be a synovial cyst off the MCP joint on the thumb, also known as a ganglion cyst, or is could be a sesamoid bone if it has been there forever, or a rupture of the opponens pollicis muscle tendon, if you were working hard with your hand. the latter would be painful, is there any pain? since you said it was associated with a tendon, it could be a synovial cyst as an outpouching of the sheath around a tendon, in this case flexor pollicis longus (look at how the sheath is in the webspace) or flexor dig. superficialis tendon. In those situations, you might feel some resistance to flexing your fingers, the beginning of "trigger finger" I will attach a picture of the flexor aspect of you hand. When you flex your thumb, does the bump move? let me know ok? Dr Frank t
no pain; if my palm is wide stretched and I press on the lump, it unflexes my hand if that makes any sense; attempting to attach photo with area circled:
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