Pancreas is an elongate-shaped, nearly 6 inches long, situated in the upper region of the abdomen performing two vital tasks:

• Production of digestive enzymes that are proteins aiding in assimilating food into the small intestine. Cells that carry out this task constitute the exocrine pancreas.
• The second significant task is hormone production that gets released into the blood. These cells constitute the endocrine pancreas.

Endocrine Pancreas

The endocrine pancreas comprise of particular cells, known as the islets of Langerhans that secrete hormones. The most vital hormone being secreted is insulin that aids in managing blood glucose levels. Cancers that originate in the islet cells are known as islet cell tumors or pancreatic neuroendocrine tumors. Such tumors are atypical and could secrete hormones that cause major fluctuations in the blood glucose levels or lead to signs like pain and discomfort in the stomach and acute diarrhea.

Exocrine Pancreas

The exocrine pancreas comprise of ducts and acini that are tiny compartments located at the end of the ducts. The cells that line the ducts are most prone to developing cancer, known as ductal adenocarcinomas – the most prevalent form of pancreatic cancer.

Pancreatic cancer is mostly referred to as a tacit disease as it characteristically is asymptomatic in its early stages. The cancer could metastasize, spreading for a while till the symptoms start becoming evident. The early signs are so unclear that often they are primarily overlooked, due to which pancreatic cancer detection is tough in the early stages.

In several situations, the cancer has proliferated beyond the pancreas by the time it is spotted. When symptoms do start appearing, their kind and extent is dependent on where the tumor is located and how big is the tumor in size.

Prevalent signs might comprise of:

Jaundice

In case there is blockage in the bile duct caused due to the tumor, there is major hindrance in the flow of bile into the intestines leading to jaundice that makes the affected person’s skin and the white areas of the eyes turn yellowish. Jaundice causes the urine to turn a darker shade and the faeces could turn whitish like clay in colour.

Pain and Discomfort

When the cancer metastasizes, pain mostly is sensed in the upper section of the abdominal region and the back. The pain would often intensify subsequent to consuming anything or while lying down.

Reduction in weight

Pancreatic cancer could additionally lead to weight reduction. This mostly occurs because of the insufficient calorific ingestion due to the nauseous feeling, puking and depleted appetite.

Digestive Disorders

Indigestion could be the consequence of the cancer hindering the free passage of the pancreatic juices into the intestines that assist in breaking down the dietetic fats, proteins and carbohydrates inside the body. Stools could appear unusually pallid, bulky or slippery, appear afloat in the toilet, or emit a particular fetid stench.

Risk Factors

Though the reasons leading to pancreatic cancer are still ambiguous, some risk factors have been detected that raise an individual’s likelihood of developing pancreatic cancer. These comprise of:

Smoking

Smoking is known to raise the risk of developing pancreatic cancer by two to three folds as compared to non-smokers.

Age

The risk of developing pancreatic cancer is directly proportional to age. Those individuals past sixty years or more have been widely identified with the disease.

Race

Certain races like Afro-Americans have been observed to have more cases of pancreatic cancer as compared to Asian, Hispanic and white races.

Chronic Pancreatitis

Those who have previously ailed from chronic pancreatitis are more likely to develop pancreatic cancer.

Diabetes

Pancreatic cancer is more often known to affect some diabetics.  Diabetes might additionally be a complication or a preliminary symptom of pancreatic cancer.

Dietetic Intake

A regular dietetic intake of fat-rich foods, particularly processed red meats, might raise the likelihood of developing the disease.

Being Overweight

Those with weight issues like being obese or overweight have greater risk of developing pancreatic cancer.

Genetics

Though majority of the pancreatic cancer cases are not genetic in nature, hereditary conditions could raise the likelihood of developing pancreatic cancer.

Nearly 5-10% cases of pancreatic cancer cases are deemed heritable or associated to a particular genetic mutation. Pancreatic cancer is believed to be present in those families that have 2 or more first-degree blood relatives – like parents, brothers/sisters or kids – have the disease. This is at times known as familial pancreatic cancer or FPC. In case an individual is having a first-degree relative having pancreatic cancer, then it majorly raises that person’s risk in comparison to the average individual.

An elevated risk has additionally been linked with several genetic syndromes inclusive of genetic breast, ovarian and colon cancer and a grave form of skin cancer known as FAMMM or familial atypical multiple mole syndrome.

In spite of a 3-decade old existence that offers plenty of time for the cells to turn malignant, a small-sized rodent known as the naked mole rat has never been detected with cancer – and currently naturalists from the University of Rochester believe they recognize why this is occurring.

Naked mole rats are weird, hideous, almost bald, mouse-resembling creatures living in underground communes. In contrast to any other mammalian form, these communes comprise of queens and worker colonies, more alike the bees than rodents. Mole rats have a life span of up to three decades that is outstandingly long for a tiny rodent.

This detection was published in ‘The Proceedings of the National Academy of Sciences’, reveal that the mole rat’s cells produce a gene p16 that has a stifling effect on the cells, halting the cells propagation when too many of them swarm together, nipping off runaway augmentation prior to it even starting.

The effect of p16 is so distinct that when scientists attempted to mutate the cells in order to initiate a tumor, the cells’ growth hardly varied, whereas normal mouse cells turned totally malignant.

Vera Gorbunova, professor of biology at the university states that they have unearthed the reason why such mole rats fail to develop cancer, and it is quite an astonishing finding. Professor Vera further added that it was too premature to cogitate about the implications; however, if the effect of p16 could be replicated in humans, they just might have come up with a novel and potent means to halting cancer prior to it commencing. Gorbunova further added that in spite of the huge numbers of mole rats that are under examination, there have been no cited cases of cancers found in them.

Adding to their bafflement is the fact that mole rats have been observed to have hardly any aging till the very concluding phases of their lifespan.

When the team started studying mole rats cells, they were bewildered at how complex it was to grow the cells in the laboratory for study. As soon as a particular number of cells occupied a certain space, they would simply not replicate any further. Other cell types, like human cells, too stop reproduction once their populaces turned too crowded, comparatively the cells of the mole rats were observed to reach their limit sooner than human cells.

Gorbunova stated that as cancer is principally runaway cell reproduction, a conclusion was drawn that whatever was doing this, was also possibly the analogous thing that averted cancer from ever laying base.

Like several animals, humans included, the mole rats had a gene known as p27 that averted cellular congestion, but the mole rats employed another, previous safeguard in gene p16. Cancer cells have a tendency of uncovering means around p27, however, mole rats have dual barricades that a cell would need to cross prior to growing uninhibitedly.

Gorbunova states that the additional safeguard proffered by this two-tier contact inhibition is the major contributor towards the notable tumor resistance of the naked mole rats.

Gorbunova and her team mates intend to research in a more comprehensive manner into the mole rat’s genetics to perceive whether their cancer resistance could effectually be applied on humans too.

This family of tumors comprises of:

• Ewing tumor of the bone – This kind of tumor is detected in the bones of the legs, arms, chest, trunk, back or even the head region. There are three kinds of Ewing tumor of the bone namely:
  • Classic Ewing sarcoma – A form of cancer also known as peripheral neuroectodermal tumor and pPNET that develops in the bone or soft tissue.
  • Primitive neuroectodermal tumor or PNET – One of the clusters of cancers developing from analogous kinds of early cells, sharing particular biochemical and genetic attributes. Some of the primitive neuroectodermal tumors start developing in the brain and CNS or Central Nervous System known as CNS-PNET, and others developing in locations outside the perimeters of the brain like limbs, pelvic region and chest wall known as the peripheral PNET or also called PNET.
  • Askin tumor or PNET of the chest wall – This form of tumor affects the chest wall that comprises of the muscles, joints and bones that constitute the region lying between the neck and the abdomen.

• Extraosseous Ewing Sarcoma ( tumor proliferating in the tissue not involving the bone or found outside the bone). This form of soft tissue is observed in regions of the trunk, arms, legs, head and the neck.

Ewing Tumor Signs and Symptoms:

The following stated symptoms could be occurring due to Ewing family of tumors though there might be other conditions that might be eliciting similar symptoms. Medical assistance needs to be taken in case any of the following symptoms occur.

• A pain that may or may not be accompanied by swelling generally noted in the areas of the arms, legs, chest, back or the pelvic area that lies between the hips.
• A lump formation developing in the arms, legs, chest or the pelvic area that might give a warm sensation.
• Fever occurring due to no apparent and identified reason.
• An unexpected rupture or crack in the bone for no recognised reason.

Though retinoblastoma might surface irrespective of age, it is generally observed among infants below 5 years. The tumor might affect one or both the eyes, though it is quite atypically noted to metastasize to the adjacent tissues or other areas of the body. Retinoblastoma is generally detected in just one eye and could generally be treated.

Retinoblastoma  – Due to gene mutation transferred to the off-spring

Retinoblastoma is at times inheritable. When it occurs due to inherent gene mutation, it is known as hereditary retinoblastoma. It has generally been observed to affect the younger age bracket than retinoblastoma that is non-inheritable. Retinoblastoma occurring in just one eye is generally non-inherent in nature. Retinoblastoma occurring in both eyes is always genetic. Hereditary retinoblastoma initially occurring in just one eye is likely to imminently affect the other eye. Following detection of retinoblastoma in one eye, follow-up examinations must be carried out at regular intervals of two to four months for no less than twenty-eight months. On conclusion of the retinoblastoma treatment, it is crucial that follow-up examinations be continued till the child reaches five years of age.

Treating both kinds of retinoblastomas must comprise of genetic advice being furnished by trained professionals regarding genetic diseases. Siblings of an infant that has retinoblastoma would also need to be regularly examined by an ophthalmologist and genetic counselling sessions be offered regarding the risks of getting cancer.

Infants having hereditary retinoblastoma more prone to trilateral retinoblastoma and other cancers

An infant with hereditary retinoblastoma is more prone to pineal tumors that might develop in the brain. This is known as trilateral retinoblastoma. Timely follow-up examinations employing Magentic Resonance Imaging (MRI) or computerised tomography (CT) scan for checking for this atypical condition is crucial while treating retinoblastoma and must be consistently followed till the child is five years of age. Children having hereditary retinoblastoma are also more prone to contracting other kinds of cancers during the later part of their lives.

Retinoblastoma Symptoms:

• The pupil of the eye appearing white rather than red when any light is focused on it. This might be perceivable in flash snaps of the infant.
• Eyes seem to looking in diverse directions.
• Pain and discomfort experienced in the eye and reddening.

Diagnosis & Tests:

The below-stated test and procedures could be conducted:

• Physical examination: During the physical exam, the body is checked for overall signs of health inclusive of any symptoms of diseases like lumps or any dubious occurrence. The person’s history in reference to family history, past medical conditions and health habits are also probed.
• Eye examination with pupil dilatation: Pupil dilatation or opening wider by using medicinal eye drops aids in easier viewing via the lens and pupil to the retinal area. An examination of the inner area of the eye inclusive of the retina and the optic nerve is carried out using an illuminated source. Dependent on what the age of the child is, the examination is performed after administering anesthesia.
• Ultrasound Examination: During this procedure echoes are produced by the high-energy ultrasound or sound waves that rebound off the surfaces of internal tissues or organs. These echoes form an image of the tissues it bounces off known as sonogram.
• CAT or CT scan: During this procedure, arrays of high-definition images of the internal organs like the eye are produced from varied angles by linking an x-ray machine to the computer. An intravenous dye injection might be given or ingested so that the images of the organs or tissues appear more lucidly on the CAT scan also referred to as the computed tomography, computerised tomography or computerised axial tomography.
• MRI (magnetic resonance imaging): Employing a magnet, radio waves and a computer, a series of in-depth images of the internal organs of the body like the eye are taken. Such a procedure is also known as NMRI or nuclear magnetic resonance imaging.

Retinoblastoma is generally detected without the need of carrying out a biopsy (tissue/cell removal for microscopic analysis to diagnose for the presence of cancer).

Prognosis (likelihood of recovery)

The prognosis or chances of recovery and the treatment choices hinge on certain below stated factors like:

• The staging of the cancer.
• The chances of saving eyesight in one or both the eyes.
• The extent and the amount of tumors.
• If trilateral retinoblastoma comes about.