The inferior vena cava, the biggest vein in the body, forms from the joining of the two common iliac veins at about the level of the umbilicus slightly right from the spine. On its way up to the heart, inferior vena cava collects blood from kidneys and all of the organs of the abdomen, penetrates the diaphragm and drains into the right atrium.

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    Once the common femoral vein leaves the lower extremity and enters the pelvis by crossing under the inguinal ligament it becomes the external iliac vein. The internal iliac vein collects all the blood from the organs of the pelvis. The external and internal iliac veins join together forming a common iliac vein.

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    A lymph node is a small oval-shape collection of lymphatic tissue belonging to the immune system. They are strategically positioned in small groups across the entire body. Lymph nodes are connected with each other via lymphatic vessels. They collect and filter lymph and eventually drain it into the blood. While from the heart the fresh blood is carried by the arteries, the return of the used blood happens not only through the veins, but also via the lymphatic circulation. Lymph delivers antigens foreign to our body, such as bacteria, viruses and malignant cells into the lymph nodes, where they are destroyed. Also lymph carries lipids not soluble in the blood. The majority of flexor surfaces of our joints contain groups of lymph nodes. For example, axillary, inguinal and popliteal groups of lymph nodes are located in the underarm, groin crease and behind-the-knee areas correspondingly. It is not uncommon for the lymph nodes to become enlarged in response to the development of infection or malignancy in the area drained by them. For example, infection of the lower extremity can be accompanied by enlargement of popliteal or inguinal lymph nodes, while breast cancer can lead to metastatic enlargement of axillary lymph nodes.

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    The femoral veins while belonging to the deep venous system are divided into common, superficial and deep femoral veins. The superficial femoral vein is a continuation of the popliteal vein. It delivers the blood from the lower leg and foot into the common femoral vein just below the groin, where the deep femoral vein brings used blood from the tissues of the thigh. The common femoral vein receives the greater saphenous vein and after passing under the inguinal ligament becomes the external iliac vein.

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    The greater saphenous vein is the largest one of two veins belonging to the superficial venous system. It helps the deep veins to bring all the blood from the lower extremities up toward the heart. Despite its name ("saphenous" on Latin means "wandering") in healthy state it has relatively constant position on the leg. The greater saphenous vein occupies the inner part of the ankle and thigh, and empties into the common femoral vein right in the groin crease.

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    The popliteal vein forms from merging tibio-peroneal veins just below the knee, goes up behind the knee, where it collects the blood from the knee joint, receives the lesser saphenous vein and becomes the superficial femoral vein right above the knee.

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    The lesser saphenous vein is a relatively small superficial vein located on the back of the calf. It drains into the deep popliteal vein.

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    There are at least two of the anterior tibial, posterior tibial and peroneal veins corresponding to each artery with the same name. These veins are located next to the corresponding artery, but bring the blood in the opposite direction - upstream. All these veins originate individually from the plantar arch and join together into the popliteal vein right behind the knee.

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Visiting Dr. Khitin was a refreshing experience. I've visited multiple physicians and it looks like most of them treated me like a number. Dr. Khitin has an amazing ability to patiently explain all of the intricacies of the disease. Treatment went smooth. I feel 15 years younger! Thanks doc! –Anastasia L., Manhattan NY

I usually don't write reviews, but I feel that Dr. Lev literally saved my leg. I am 35 and not the typical patient for this kind of stuff, but I had an open ulcer on my leg for 3 years!!! Compression, creams, special diet - nothing helped. After Dr. K's treatment, the ulcer slowly began disappearing and it was gone in 6 weeks. If you ever had an ulcer, you know exactly how I felt! Thank You! Thank You! Thank You! – Mike B., Fair Lawn NJ

I was referred to Dr. Khitin by my primary after suffering for many years from restless leg syndrome and varicose veins. Dr. Khitin is the best! Knowledgeable, experienced, but most importantly, he cares! Relief came shortly after the very first treatment. Definitely recommend this doctor. –Samantha K., Manhattan NY

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Thank you so much for all your terrific work. I have spent over a decade trying to find the right doctor, while my legs have been getting worse and worse. Dr. Khitin has changed my life and returned my freedom: finally, I can walk independently! –Donna W., Manhattan NY

The most outstanding treatment I have received! All questions answered, tests done, procedures performed and I feel like a new person in no time! Thank you so very much! –Peter R., Philadelphia PA

I have suffered from trophic ulcers for 28 years until I got to Dr. Khitin’s office! He has literally saved my legs! If you have problems with your legs and do not want to get an amputation, do not see any other physician: do see Dr. Khitin right away! –Bob from UPS,  NY

I have traveled thousands of miles to see Dr. Khitin, who literally returned me my health back! Thank you and all your staff for the most wonderful experience! –Dominique S., Montreal, Canada

On behalf of my father, I would like to express our sincere gratitude for your hard work and dedication: you have returned my dad his life and independence back: previously wheel-chair bound for years, now he is walking by himself! –Andre Y., Newark NJ