Mark S. Sywak

Endocrine Surgeon

Male📍 Sydney

About of Mark S. Sywak

Mark S. Sywak is an Endocrine Surgeon based in Sydney, NSW, Australia. He works with people who have complex hormone-related conditions, especially when surgery is needed.


His clinical work covers thyroid and parathyroid problems, such as thyroid cancer, thyroidectomy, and parathyroidectomy. This can include issues like papillary thyroid cancer, follicular thyroid cancer, medullary thyroid carcinoma, and anaplastic thyroid cancer. He also looks after conditions like thyroid nodules, Hashimoto thyroiditis, and hyperparathyroidism or hypoparathyroidism.


Mark also treats adrenal gland conditions. That can mean surgery for adrenal cancer, adrenal gland adenoma, hyperaldosteronism, and problems such as pheochromocytoma. At times, he may be involved with care for people with rarer hormone conditions like multiple endocrine neoplasia (including MEN type 1 and MEN type 2).


Beyond the endocrine glands, the range of care listed for his practice includes neuroendocrine tumours and other related growths. For kidney-related issues, his services include help for chronic kidney disease and end-stage renal disease (ESRD), where hormone and gland problems can link in with the bigger health picture.


Experience details are not listed on this profile, but his work involves endocrine surgical care across a mix of diagnoses, from thyroid and parathyroid surgery to adrenal procedures. Education and training details also aren’t shown here, so there isn’t much to add beyond what’s already on the page.


No publication, research, or clinical trial details are provided on this profile. If you’d like more info for a specific condition, it’s best to contact the clinic and ask what experience is most relevant to your situation.

Services & Conditions Treated

Papillary Thyroid CancerParathyroidectomyThyroid CancerThyroidectomyAdrenal CancerAdrenal Gland AdenomaAnaplastic Thyroid CancerHyperparathyroidismHypoparathyroidismMedullary Thyroid CarcinomaMultiple Endocrine NeoplasiaMultiple Endocrine Neoplasia Type 2Neuroendocrine TumorParathyroid AdenomaParathyroid CancerPheochromocytomaAdrenocortical CarcinomaAnal CancerChronic Kidney DiseaseEnd-Stage Renal Disease (ESRD)EndoscopyFibromatosisFollicular Thyroid CancerHashimoto ThyroiditisHyperaldosteronismLymphofollicular HyperplasiaMetabolic AcidosisMultiple Endocrine Neoplasia Type 1Parathyroid HyperplasiaThyroid DysgenesisThyroid Nodule

Publications

1 total

Tumor-Infiltrating Lymphocytes Assessed Using the International TILs Working Group System Are Not Prognostic in Medullary Thyroid Cancer.

Thyroid : official journal of the American Thyroid Association • January 27, 2025

Frequently Asked Questions

What services does Dr Mark S. Sywak offer?
Dr Sywak provides a range of endocrine surgical services, including thyroid and parathyroid surgery, treatment for thyroid and adrenal cancers, and related conditions such as hyperparathyroidism and hypoparathyroidism. He also handles conditions under multiple endocrine neoplasia and certain neuroendocrine tumours.
Which conditions might benefit from seeing Dr Sywak?
Patients with thyroid nodules or thyroid cancer, parathyroid disease (like parathyroid adenoma or hyperplasia), adrenal gland issues (such as adrenal tumours or pheochromocytoma), and related endocrine disorders may be referred for assessment and surgical management.
How do I book an appointment?
If you’re looking to see Dr Sywak for endocrine surgical care in Sydney, you’ll need to contact the clinic to arrange an appointment. The team can discuss availability and the best initial steps for your situation.
What should I bring to my first visit?
For a first assessment, bring any relevant medical records, imaging results, and a list of current medications. This helps the clinician understand your condition and plan the right treatment.
Where is the clinic located?
Dr Sywak practices in Sydney, NSW, Australia. If you need the exact address or travel directions, please contact the clinic directly for the most up‑to‑date details.
What happens after surgery?
Post‑operative care will be explained by the surgeon and care team. This usually includes follow‑up appointments, monitoring of symptoms and lab tests as needed, and guidance on recovery and lifestyle adjustments related to the procedure.