Plant Thorn Arthritis
(Plant Thorn Synovitis or Thorn Arthritis)

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What is plant thorn arthritis?

Plant thorn arthritis is a noninfectious inflammation of a joint as a result of a thorn puncturing the joint and leaving residual plant matter lodged within the joint. The plant thorn fragments cause a localized inflammation reaction in the joint lining tissue that leads to swelling, stiffness, loss of range of motion, and pain. The joint lining tissue is called the synovium. Inflammation of this tissue is medically referred to as synovitis. Plant thorn arthritis is also called plant thorn synovitis.

What plants cause plant thorn arthritis?

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The plants that commonly cause plant thorn arthritis are those that produce thorns. These plants include palm trees, roses, black-thorn shrubs, cacti, bougainvillea, yucca, pyracantha, plum trees, and mesquite trees.

What joints are typically involved in plant thorn arthritis?

Plant thorn arthritis typically affects only a single joint -- the joint that was pierced by the plant thorn. The most common joints affected by plant thorn arthritis are those that can be exposed to being stabbed by falling into or brushing up against plants with thorns. Joints that are commonly affected by plant thorn synovitis include the small joints of the hands (metacarpophalangeal joints, proximal interphalangeal joints), feet, elbows, knees, and ankles.

What are plant thorn arthritis symptoms and signs?

Plant thorn arthritis causes the involved joint to be swollen, slightly reddish, stiff, and painful. The joint loses its full range of motion and is often tender. These symptoms may be noticed only many days after the initial thorn puncture. It is not uncommon for the person affected by plant thorn arthritis to remove the thorn immediately after the puncture and then develop the arthritis many days or weeks later and not even recall that the joint had been punctured previously! This is because the original thorn has actually left behind small fragments of thorn vegetable matter that gradually cause the inflammation of plant thorn arthritis. This form of single joint arthritis (monoarthritis) then becomes chronic until appropriately treated.



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Plant Thorn Synovitis - Treatments Question: What treatment has been effective for your plant thorn synovitis?
Plant Thorn Arthritis - Types of Plants Question: If known, what is the name or type of plant that caused your plant thorn arthritis?
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Doctor Gets Plant Thorn Arthritis

One patient's story

In a reasonable attempt to better the lives of my daughter, Cara, and son-in-law, Jim, as well as enjoy their company during a concentrated effort, I assisted them in landscaping one fine weekend day. With the primary goal of building a retaining wall and secondary goal of tidying up overgrown greenery, I attacked a palm tree grouping with pruning shears. The palm tree group of three (Phoenix roebelenii to be scientifically precise) hadn't been pruned since they moved in some two years ago. It was well overgrown and in serious need of shaping.

Jim was industriously off at the store purchasing cement blocks, and I was in a hurry to get the pruning completed so as not slow the construction of a block retaining wall upon his return. I was wearing gloves that had extra padding over the knuckles. I finished the pruning in a timely manner and was available to help Jim unload the blocks when they arrived.

We installed the blocks regularly along a well-designed foundation that Jim and his boyhood friend Andrew built. While lifting the blocks, I felt a soreness in my right hand and at first wondered if I had strained the tendons of my fingers by pruning too rapidly. I removed the work glove on my right hand to find two thorn tips embedded in it! One was in the back of first segment (proximal phalanx) of my middle finger. The other was stuck directly in the joint at the base of the middle finger, the knuckle joint (third metacarpophalangeal joint).


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