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Menstrual Related Symptoms and MCAS

Mast Cell Disease Day is October 20th every year. Since I have a lot more to say than one day will hold, I’m breaking the rules and declaring October MCAS Awareness Month! This year, we’ll be focusing on bringing awareness of the effects of Mast Cell Activation Syndrome on the female reproductive system. We began with my own personal history with these issues and continue the discussion below.

Continuing our discussion of the effects of mast cell activation syndrome on the female reproductive system, we now turn to the most recent research for elucidation on menstrual related complaints in women with the condition. Research points to a prevalence of mast cell activation syndrome (MCAS) in the general population, however this newly recognized group of conditions is thought to be massively underdiagnosed by leading researchers and clinicians. Are they missing a huge opportunity in gynecology to discover and properly treat unwitting sufferers of this complex condition? How does this help menstruating women who don’t have MCAS? Let’s find out.

An exploration of the connections between mast cell activation syndrome and the symptoms of PMS, PMDD, dyspareunia, dysfunctional uterine bleeding, and vaginitis. Believe it or not, addressing your period woes, no matter how extreme, may be helped with the use of the same antihistamines and mast cell stabilizers used in allergy and mast cell conditions!

Many of us with MCAS (including myself) like to think of MCAS primarily as a disease featuring histamine overload. It’s not unusual to hear one of us say something like “I’m allergic to my own period,” but it’s really a bit more complex. Let’s see if we can’t break it down into a language we can all understand and discuss some possible solutions while we’re at it!   

In case you’ve never heard of mast cell activation syndrome, let’s do a quick review. MCAS is a mutlisystemic condition featuring chronic, inappropriate mast cell activation. Mast cells (immune modulating white blood cells which control the flux of dozens of chemicals in our bodies) begin to act erroneously, dumping excess amounts of chemical mediators, such as allergic reacting histamine, inflammation producing cytokines and significant quantities of heparin, which aids in the coagulation of blood. There are many other mediators which can be involved, but for the purpose of this discussion, they’re the most important.  

During the diagnosis of certain gynecological conditions, are doctors missing MCAS (pronounced as “em-cahs”) patients by failing to recognize its menstrual related symptoms? Is medicine missing an opportunity to easily treat these symptoms? Doctors Afrin and Dempsey seem to think so, as it’s the central focus of their most recent research on the effects of antihistamines and mast cell stabilizers on dyspareunia (painful intercourse), dysfunctional uterine bleeding (DUB), and vaginitis (idiopathic inflammation of the uterus that results in discharge, itching and pain). These complaints are common and widespread among MCAS patients and the science is clear on the involvement of mast cells in the genitourinary system (the genital and urinary organs).

Like the Gastrointestinal system, the genitourinary system is a bigger target of increased mast cell activity due to its connection with the outside world. It’s within our bodies, but exposed to outside influences. Amber Walker notes in Mast Cell United that “some women with MCAD report allergic reaction with semen contact and/or allergies to condoms.” this is consistent with my own experiences and anecdotal reports I’ve heard from other MCAS patients.

Walker notes that “histamine is implicated in aspects of arousal-related sexual behavior” and tends to drive libido. Interestingly, anecdotal information indicates that female patients with MCADs may experience increased libido. However, some patients report a decrease in libido. This difference could possibly be accounted for by the influence of mast cell degranulation on the autonomic system and the vagus nerve, which is suspected to reach and interact with our reproductive organs. The influence of histamine can create neuralgia and contribute to the formation of autonomic dysfunction, such as POTS, a common comorbid condition to MCAS.

Human mast cells also have receptors for many sex hormones and they can exert a powerful influence on degranulation. Walker notes that estrogen, estradiol, luteinizing hormone and follicle-stimulating hormone all increase mast cell degranulation, while activation of progesterone and testosterone receptors have an inhibitory effect. Since these hormones vary throughout the 28 day cycle of growing the uterine lining, ovulation and then menstruation, it’s easy to see why certain periods of the menstrual cycle can increase degranulation and the symptoms of MCAS. It also explains why chemical birth control helps to attenuate some of these effects.

Furthermore, mast cell mediating prostaglandins have been implicated in premenstrual syndrome. The cramping and bloating associated by PMS may be associated with mast cell degranulation. Given how misbehaving mast cells like to go to extremes, this may account for the increased pain and bloating many women with MCAS experience.  

Doctors Lawrence Afrin and Tania Dempsey feel it’s quite likely that women who suffer with premenstrual syndrome, premenstrual dysphoric disorder, dyspareunia and other common menstrual related health problems likely suffer from mast cell activation syndrome, especially if they have other classic symptoms of MCAS. These women could benefit from the treatment of their symptoms with systemic antihistamines and mast cell stabilizers, such as diphenhydramine (Benadryl), quercetin or cromolyn. Recently, they conducted a small study of women who suffer from these symptoms. Participants saw symptom improvement when using an intravaginal method of application.

Human Mast Cells from under a microscope, Image: Flickr
Human Mast Cells, Flickr

These simple treatments seem by far preferable to the way my own symptoms were treated throughout my lifetime, which began with controlling my symptoms with the use of chemical birth control and finally at age 42, a total hysterectomy. My symptoms of DUB and dyspareunia were completely resolved after receiving a total hysterectomy. Total hysterectomy also helped to dramatically reduce my symptoms of PMDD, but was more of a half measure.  I still struggled with mood swings around my ovulation cycle, but still experienced changes in my emotions and ability to control them. However once I started treating myself with quercetin (a mast cell mediator) and ample levels of Zyrtec (cetirizine), an antihistamine. I can’t imagine anything but a hysterectomy and the opportunity to remove all the scar tissue they found (not to mention having to separate most of my organs from each other and all that scar tissue) having fixed my dyspareunia.

Of course, we are finding out from the recent Afrin and Dempsey study that such a radical procedure is not necessary to control and treat MCAS related symptoms. I had my hysterectomy out of sheer desperation and the belief that I had endometriosis. After analyzing tissue sample after tissue sample, not a single cell of endometrial tissue was to be found among what they pulled from me, confirming my problem had never been endometriosis.

Despite giving up my uterus, mood swings around apparent cycle changes remained, even if they were greatly lessened. My bouts of recurrent vaginitis were not, at least not until I got my levels of antihistamine and mast cell mediators to an uptake level to calm these angry mast cells; a scenario consistent with Afrin and Dempsey’s findings.

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Does MCAS cause Endometriosis? That is a question that doesn’t seem to yet be answered. While mast cells are implicated in the inflammation inherent in endometriosis (not to mention any other condition featuring inflammation), it is not yet clear if mast cells can actually cause endometriosis, though the question has been studies, at least by one research team.

Dennis Kirchhoff found that while he couldn’t quite answer whether mast cells could be implicated in the inception of EMS, they do play a role in the disease and targeted mast cell treatment could be beneficial to patients with EMS.

With both groups of patients benefiting from targeted mast cell treatment, it almost seems a moot point of whether one causes the other, but of course working toward prevention and possible cures demands these questions be asked and answered.

Why all the scar tissue?

You may be asking yourself at this point, if she didn’t have endometriosis, where did all that scar tissue come from? I don’t really have an answer, but of course I have a theory. My best guess is excessive retrograde menstruation, which could have been made worse by the release of heparin from my misbehaving mast cells. Heparin thins the blood and prevents clotting. Retrograde menstruation describes the phenomenon of menstrual blood flowing back into a woman’s body during menstruation and carrying with it tissue from the endometrium (uterine lining). It was a theory originally introduced to explain endometriosis, however it was later discovered that retrograde menstruation occurs in all women to varying degrees. Why endometriosis occurs in some women while not in others is still not clearly understood.

Interestingly, MCAS has also been found to cause hypercoagulability (too much clotting) and may contribute to the formation of large clots as a feature of dysfunctional uterine bleeding. Once again, I have experienced both. In my earlier years, clotting was a real issue, while as my MCAS problems grew; my blood became thinner and thinner. These things make me wonder if perhaps MCAS has disease stages or phases of some kind.

The effect of hormones on mast cell activation is well established. “Sex hormones modulate immune and inflammatory cell functions, including mast cell secretion, and are regarded as responsible for gender and menstrual cycle phase-associated differential susceptibility and severity of some autoimmune and inflammatory diseases. Chronic urticaria is approximately twice more frequent in women than in men.” (Kasperska-Zajac). It stands to reason that this natural bodily process would become heightened in women with MCAS.

It seems there are vastly more questions than answers on the subject, but one thing remains clear. MCAS can exert powerful influence on menstrual related symptoms. Until recently, these symptoms were often considered idiopathic or were attributed to endometriosis: However, based on recent research and my own experience, it is clear that these symptoms can and do exist in extremes in MCAS and may be considered symptoms of the condition.

Knowing this could help more women than those with MCAS. From these findings, it could benefit all women who experience bloating and cramping during the premenstrual portion of the cycle and exploring mast cell mediators or antihistamines with your doctor could be beneficial for all women.

Join us for our next post on MCAS and the female reproductive system as we delve into the topics of fertility and pregnancy. Does MCAS affect fertility? Is pregnancy complicated by MCAS? I hope to address these questions and more as the series continues throughout the month of October and beyond.

References and Related Resources

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Chiari Malformation: What You Need to Know

Chiari Malformation: What You Need to Know

Part I of our Chiari Malformation Awareness Month Series

It’s Chiari Malformation Awareness Month and time to put this important neurological condition in the spotlight. It’s a subject near and dear to many EDS zebras, as it is a common comorbid condition to the Ehlers-Danlos Syndromes.  Chiari Malformation can also be congenital and is believed to be the widest known cause of CM today, however it is possible this may be a misconception due to the failure of many to recognize the role that hypermobility and craniocervical instability may well play in the development of Chiari later in life.

There are also a number of socio-political factors that block the treatment and discovery of Chiari, which will be explored in the second part of this two part series. Part two will also include the firsthand perspectives and experiences of people who have a confirmed Chiari Malformation (CM) diagnosis so we can get an intimate picture of what it’s like to live with the condition, though it’s important to understand that like most chronic illnesses, no two people seem to experience CM quite the same. In this first post, we will walk through the basics of CM, learning what Chiari Malformation is, the four known types and how they are classified. Of course no informational post on a condition would be complete without exploring the known causes, symptoms, and treatments.  

What is a Chiari Malformation?

It is said that the Chiari Malformation affects 1 in 1,000 people: However, the increased use of diagnostic imaging has shown that Chiari malformation may be much more common(1). Chiari Malformations are structural defects located at the in the base of the skull where the spine meets it. These structural defects can cause the brain to sag into the spinal canal, causing herniation of a portion of the cerebellum, cerebellar tonsils and/or the fourth ventricle. Depending on the severity, there are a variety of symptoms and complications that come with Chiari Malformation.

The cerebellum is the part of the brain that controls balance, memory, cognition and motor skills.  Normally the cerebellum and parts of the brain stem sit above an opening in the skull that allows the spinal cord to pass through it. This is called the foramen magnum.  In CM, part of the cerebellum extends below the foramen magnum and into the upper spinal canal, causing pressure on the cerebellum and brain stem that may affect functions controlled by the cerebellum and block the flow of cerebrospinal fluid (CSF).

Learn about Cerebrospinal Fluid and Lumbar Puncture: here.

There are four types of chiari malformation. According to the American Association of Neurological Surgeons, they are classified in the following ways:

 Type I occurs during fetal development and is characterized by downward displacement by more than four millimeters, of the cerebellar tonsils beneath the foramen magnum into the cervical spinal canal. Anomalies of the base of the skull and spine are seen in 30-50 percent of patients with Chiari I malformation.

Type I is also believed to include the formation of Chiari Malformation through Craniocervical Instability, where CM often meets with EDS or another Hypermobility Spectrum Disorder (HSD), such as JHS, Marfan Syndrome, or Loey-Dietz Syndrome. According to the Pain Relief Foundation, “Craniocervical Instability (CCI), also known as the Syndrome of Occipitoatlantialaxial Hypermobility, is a structural instability of the craniocervical junction which may lead to a pathological deformation of the brainstem, upper spinal cord, and cerebellum. It primarily occurs in patients with Ehlers-Danlos Syndrome and other hereditary disorders of connective tissue (4).”

The Ehlers-Danlos Society notes that we need to develop a better understanding of the prevalence and variance of CM in EDS/HSD, along with educating neurosurgeons on the role of hypermobility may play in chiari malformations (5).

Diagram compare a human head absent Chiair Malformation in comparison to diagram's depicting Types I and II. Image property of the Zebra Pit.

Type II is characterized by downward displacement of the medulla, fourth ventricle and cerebellum into the cervical spinal canal, as well as elongation of the pons and fourth ventricle. This type occurs almost exclusively in patients with myelomeningocele, a congenital condition in which the spinal cord and column do not close properly during fetal development.

Type III includes a form of dysraphism (a spectrum of congenital anomalies resulting from incomplete or aberrant neural tube fusion, 3.) with a portion of the cerebellum and/or brainstem pushing out through a defect in the back of the head or neck. These malformations are very rare and are associated with a high early mortality rate or severe neurological deficits in patients that survive.

Type IV is the most severe form and the rarest. The cerebellum fails to develop normally. There may be other associated malformations of the brain and brainstem. Most babies born with this malformation do not survive infancy (2).

Symptoms Associated with Chiari Malformation

According to the NIH’s Chiari malformation Fact List, the hallmark sign of Chiari malformation is headache, especially after sudden coughing, sneezing, or straining.  Other symptoms may vary among individuals:

  • neck pain
  • hearing or balance problems
  • muscle weakness or numbness
  • dizziness
  • difficulty swallowing or speaking
  • vomiting
  • ringing or buzzing in the ears (tinnitus)
  • curvature of the spine (scoliosis)
  • insomnia
  • depression
  • problems with hand coordination and fine motor skills 

Some individuals with CM may not show any symptoms and symptoms may change or fluctuate, depending on personal physiology, the compression of the tissue and nerves and on the buildup of CSF pressure. 

Infants with Chiari malformation may experience the following:

  • difficulty swallowing
  • irritability when being fed
  • excessive drooling
  • a weak cry
  • gagging or vomiting
  • arm weakness
  • a stiff neck
  • breathing problems
  • developmental delays
  • inability to gain weight (1).

Of course, this is just a basic list of the most common symptoms of CM. As mentioned, it is possible for a Chiari malformation to be present, but completely asymptomatic (free of any noticeable symptoms). In these patients, the condition is usually discovered through MRI taken for unrelated reasons. However, patients may experience symptoms in the future. It has also been known for symptoms to fluctuate over time.

 As the condition progresses, there are many comorbid conditions that can develop with CM and different types have different symptoms. According to the NIH, common comorbid conditions include:

Hydrocephalus is an excessive buildup of CSF in the brain.  A CM can block the normal flow of this fluid and cause pressure within the head that can result in mental defects and/or an enlarged or misshapen skull.  Severe hydrocephalus, if left untreated, can be fatal.  The disorder can occur with any type of Chiari malformation, but is most commonly associated with Type II. 

Spina bifida is the incomplete closing of the backbone and membranes around the spinal cord.  In babies with spina bifida, the bones around the spinal cord do not form properly, causing defects in the lower spine.  While most children with this birth defect have such a mild form that they have no neurological problems, individuals with Type II Chiari malformation usually have myelomeningocele, and a baby’s spinal cord remains open in one area of the back and lower spine.  The membranes and spinal cord protrude through the opening in the spine, creating a sac on the baby’s back.  This can cause a number of neurological impairments such as muscle weakness, paralysis, and scoliosis. 

Syringomyelia is a disorder in which a CSF-filled tubular cyst, or syrinx, forms within the spinal cord’s central canal.  The growing syrinx destroys the center of the spinal cord, resulting in pain, weakness, and stiffness in the back, shoulders, arms, or legs.  Other symptoms may include a loss of the ability to feel extremes of hot or cold, especially in the hands.  Some individuals also have severe arm and neck pain. 

Tethered cord syndrome occurs when a child’s spinal cord abnormally attaches to the tissues around the bottom of the spine. This means the spinal cord cannot move freely within the spinal canal. As a child grows, the disorder worsens, and can result in permanent damage to the nerves that control the muscles in the lower body and legs.  Children who have a myelomeningocele have an increased risk of developing a tethered cord later in life.

Spinal curvature is common among individuals with syringomyelia or CM Type I.  The spine either may bend to the left or right (scoliosis) or may bend forward (kyphosis).


Diagnosis of Chiari Malformation

CM is typically diagnosed by a neurologist, preferrably one with an expertise in treating CM.  The doctor will perform a physical exam and check the person’s memory, cognition, balance (functions controlled by the cerebellum), touch, reflexes, sensation, and motor skills (functions controlled by the spinal cord).  The physician may also order an MRI, X-ray or CT. The most common imaging used is MRI. There are problems with diagnosing Chiari through the use of traditional supine positioning: However, this will be covered in our next post in this series.

Other tests the doctor might order, according to the AANS, include sleep or swallowing studies, a BAER test, myleogram, or SSEP (2).

Chiari Malformation Treatment

Left – Pre-operative. Right – Post-Operative. Image property of Mayo Clinic.

In the case of asymptomatic patients, no intervention is needed. However, monitoring of the patient, including regular check-ups, is usually recommended. In many cases, Chiari Malformation symptoms and disease progress may only be relieved or halted through surgical intervention. According to the NIH, these procedures are as follows:

The most common surgery to treat Chiari malformation is posterior fossa decompression (PFD). In the case of type II CM, a PFD is usually followed by a spinal fusion, where hardware is placed to create a supportive structure for the head and neck. This creates more space for the cerebellum and relieves pressure on the spinal cord. 

The surgery involves making an incision at the back of the head and removing a small portion of the bone at the bottom of the skull. This procedure is known as a craniectomy.  In some cases the arched, bony roof of the spinal canal, called the lamina, may also be removed to create sufficient space for the cerebellum. This procedure is referred to as a spinal laminectomy. The surgery should help restore the normal flow of CSF, and in some cases it may be enough to relieve symptoms while other patients show no improvement or even a worsening of post-operative symptoms.

Next, the surgeon may make an incision in the dura, the protective covering of the brain and spinal cord.  Some surgeons perform a Doppler ultrasound test during surgery to determine if opening the dura is even necessary.  If the brain and spinal cord area is still crowded, the surgeon may use a procedure called electrocautery to remove the cerebellar tonsils, allowing for more free space.  These tonsils do not have a recognized function and can be removed without causing any known neurological problems.

The final step is to sew a dura patch to expand the space around the tonsils, similar to letting out the waistband on a pair of pants.  This patch can be made of artificial material or tissue harvested from another part of an individual’s body.

The Zebra Pit provides everything you need to know about Chiari Malformation in this post, from the different types, to common comorbid factors and symptoms, to diagnosis, treatment and outcomes.

Infants and children with myelomeningocele may require surgery to reposition the spinal cord and close the opening in the back.  Findings from the National Institutes of Health (NIH) show that this surgery is most effective when it is done prenatally (while the baby is still in the womb) instead of after birth. The prenatal surgery reduces the occurrence of hydrocephalus and restores the cerebellum and brain stem to a more normal alignment.

Hydrocephalus may be treated with a shunt or tube that drains excess fluid and relieves pressure inside the head.  These tubes drain the excess fluid into either the chest cavity or the abdomen so it can be absorbed and disposed of by the body. 

An alternative surgical treatment in some individuals with hydrocephalus is third ventriculostomy, a procedure used to improve the flow of CSF.  A small hole is made at the bottom of the brain cavity, diverting the CSF flow to relieve pressure.  In cases where surgery was not effective, doctors may open the spinal cord and insert a shunt to drain a syringomyelia or hydromyelia, which is increased fluid in the central canal of the spinal cord (1).

What’s Next?

Today, we learned about what Chiari malformation is, the four types and their symptoms, diagnosis and surgical interventions. The next post in this series on CM will explore the outcomes for patients with Chiari Malformation, along with the socio-economic impacts that affect receiving treatment of this complex disorder in both private and public healthcare settings. It’s now available here: The Issues of Diagnosis and Treatment of Chiari and Craniocervical Instability

Then our final post will include interviews by people who have either received, or are awaiting treatment along with information about another group of patients, who strongly suspect CM, but cannot even get the proper the imaging for confirmation due to the strictures these socio-economic factors create. It’s now available here: 7 People with Chiari and CCI Share Their Stories

Let’s start the conversation early! Are you one of the suspected undiagnosed? Have you been diagnosed and/or treated? Let us know your story in the comments! And as always, thanks for joining us for this educational post about Chiari malformation.

Resources and Related Reading:

  1. National Institute of Health. Chiari Malformation Fact Sheet.
  2. AANS. Chiari Malformation.
  3. Science Direct. Learn more about Spinal Dysraphism.
  4. The Pain Relief Foundation. What is Craniocervical Instability?
  5. The Ehlers-Danlos Society. Neurological and Spinal Manifestations of the Ehlers-Danlos Syndromes (for Non-experts).
  6. NORD. Chiari Malformations.
  7. Conquer Chiari Website
  8. Piper, RJ, et al. The BMJ. Chiari malformations: principles of diagnosis and management

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Chiari Malformation may be one of the most underdiagnosed conditions for spoonies and zebras with chronic head pain and other neurological symptoms. If you have EDS, HSD, JHS, GHS, Marfan Syndrome, Loey-Dietz, ME/CFS, Fibromyalgia or a similar condition, you need to know about Chiari Malformation symptoms, along with how its diagnosed and treated.