• Korean Journal of Head & Neck Oncology
• /
• v.27 no.2
• /
• pp.240-242
• /
• 2011

Branchiogenic carcinoma is extremely rare and is defined as a malignant degeneration within the confines of epithelial remnants derived from the embryonal branchial apparatus. Two major diagnostic criteria are histologic proof of transitional area from normal cyst epithelium to invasive squamous cell carcinoma and absence of an identifiable primary carcinoma elsewhere. A 62-year old woman visited our department complaining of a non-tender, movable mass in left upper lateral neck. After a complete mass excision, histopathologic diagnosis of the surgical specimen was branchiogenic squamous cell carcinoma. I report a case of branchiogenic carcinoma with literature review.

• Korean Journal of Head & Neck Oncology
• /
• v.13 no.2
• /
• pp.265-268
• /
• 1997

Malignant lymphoma is the tumor of immune system which is known as the most common nonepitheloid tumor of head and neck region. It is mainly found in the cervical, axillary and inguinal lymph node, but gastrointestinal tract, palatine tonsil, nasopharynx, oropharynx, nasal cavity and salivary glands may be involved. Primary lymphoma of the thyroid gland is an uncommon condition, comprising approximately 2% of all malignant lymphoma and 5% of all thyroid malignant neoplasms. Recently, we experienced a case of malignant lymphoma of the thyroid gland, which was histopathologically proven. So we report our findings in this patient with review of literatures.

• Korean Journal of Head & Neck Oncology
• /
• v.29 no.2
• /
• pp.62-64
• /
• 2013

The distant metastasis is found out in about 25-57% of the patients with renal cell carcinoma at the time of diagnosis. But, the incidence of metastases to the head and neck region, especially to the thyroid gland, is rare. Most of patients with metastatic renal cell carcinoma to the thyroid gland are asymptomatic at presentation as patients with primary thyroid carcinoma. In the presence of clear cell tumor of the thyroid gland, the diagnostic considerations must include metastatic renal cell carcinoma. We report a case of thyroid metastasis from renal cell carcinoma at the time of diagnosis.

• Proceedings of the KWS Conference
• /
• 2005.06a
• /
• pp.185-187
• /
• 2005

The reactor pressure vessel head of PWR has penetrations for control rod drive mechanism and instrumentation systems. The Primary coolant water and operating temperature can cause the stress-corrosion cracking of these nickel-based alloy penetrations. It is difficult to detect and size flaws such as SCC in the reactor head penetrations using conventional W methods because of complex geometry, Therefore, the utilities are using the TOFD technique for the detection and sizing of the flaw. This study shows the correlation between the ultrasonic wave direction and the orientation of the flaw and the range of flaw depth which can be detected by the TOFD techniques.

• Archives of Craniofacial Surgery
• /
• v.19 no.3
• /
• pp.205-209
• /
• 2018

Merkel cell carcinoma (MCC) is an uncommon neuroendocrine cutaneous tumor with poor prognosis. It has the high rate of recurrence, mortality, regional nodal involvement, and distant metastases. It is difficult to diagnose MCC because of its non-specific clinical findings. It usually occurs on sun-exposed areas of the skin, mostly at head and neck. There is a difference in the incidence and prognosis according to site in the head and neck. However, there is no consented site-specific diagnosis, treatment or follow-up protocol for MCC at the head and neck. We herein report a case of MCC arising in the right earlobe of an otherwise healthy young man who has been diagnosed early, thereby successfully treated. With our closed follow-up, there was no tumor recurrence or complication at 33 months after diagnosis.

• Journal of the Korean Society of Laryngology, Phoniatrics and Logopedics
• /
• v.24 no.1
• /
• pp.13-17
• /
• 2013

Laser laryngeal microsurgery is currently the primary method of treatment of various laryngeal diseases. The development of laryngeal microsurgery came from the introduction of a small spot $CO_2$ laser micromanipulator and more precise microlaryngeal instruments. $CO_2$ laser laryngeal microsurgery has enabled very precise surgery because it has small focus size and hemostatic effect. There are some limitations to the use of the $CO_2$ Laser such as adjacent tissue damage and vocal fold scarring. These problems can be minimized through understanding the mechanisms by which lasers function and correctly manipulating the parameters under a surgeon's control. We should also recognize the safety of $CO_2$ laser for the surgeon to precisely perform the procedure.

• Korean Journal of Head & Neck Oncology
• /
• v.19 no.1
• /
• pp.71-74
• /
• 2003

Liposarcoma is one of the most common malignancies originating from human soft tissue. Because most of liposarcoma occur in the lower extremities or retroperitoneum, there are few reports about liposarcoma of head and neck region, including larynx and pharynx. Histologically, there are four types of liposarcoma, and prognosis and recurrence rate are different according to histologic subtype. Wide excision is the treatment of choice and liposarcoma hardly respond to primary radiotherapy. A 56-year-old man presented with voice change and foreign body sensation in laryngopharynx. Hypopharyngeal liposarcoma was diagnosed by surgical biopsy and performed totallaryngopharyngoesophagectomy and gastric pull-up. Here we report our experience on this case with review of literature.

• Archives of Plastic Surgery
• /
• v.48 no.5
• /
• pp.511-517
• /
• 2021

The use of free flaps is an essential and reliable method of reconstruction in complex head and neck defects. Flap failure remains the most feared complication, the most common cause being pedicle thrombosis. Among other measures, thrombolysis is useful when manual thrombectomy has failed to restore flap perfusion, in the setting of late or established thrombosis, or in arterial thrombosis with distal clot propagation. We report a case of pedicle arterial thrombosis with distal clot propagation which occurred during reconstruction of a maxillectomy defect, and was successfully treated with thrombolysis using recombinant tissue plasminogen activator. We also review the literature regarding the use of thrombolysis in free flap surgery, and propose an algorithm for the salvage of free flaps in head and neck reconstruction.

• Journal of Yeungnam Medical Science
• /
• v.35 no.2
• /
• pp.244-247
• /
• 2018

Congenital intratympanic membrane cholesteatoma (ITMC) is a rare type of congenital cholesteatoma located within the tympanic membrane. This lesion tends to increase in size over time. The development of ITMC can cause several complications such as hearing impairment, dizziness, facial palsy, and intracranial complications, similar to any other cholesteatoma. The treatment of congenital cholesteatoma requires the removal of the lesion through surgery, because disease progression induces bony destruction of the nearby tissue. Most patients presenting with this cholesteatoma type are also treated with primary surgical removal. However, we recently experienced a case of an ITMC that showed a natural transition to an external auditory canal cholesteatoma.

• Korean Journal of Head & Neck Oncology
• /
• v.11 no.1
• /
• pp.24-29
• /
• 1995

Melanoma of the mucous membrane is a rare condition and has the worse prognosis than that of any other sites. It is usually asymptomatic in early stage and difficult to find out the primary lesion by visual examination, and these facts lead to delay in diagnosis and reduce the curability. The major factor of failure in treatment of melanoma is local recurrence rather than regional spread. Because the radical procedure is difficult in head and neck lesion due to anatomical limitation, radiation therapy and chemotherapy can be used in the treatment of local recurrence. We experienced two cases of nasopharyngeal melanoma in advanced stage and treated them with radiation therapy and/or chemotherapy. And both patients showed relatively favorable response to these palliative treatments.