The use of frozen section in the excision of cutaneous malignancy: a Queensland experience

Current Surgical Therapy of Locally Advanced cSCC: From Patient Selection to Microsurgical Tissue Transplant. Review

Among the non-melanoma skin cancers (NMSC) the squamous cell carcinoma (SCC) is one of the most challenging for the surgeon. Local aggressiveness and a tendency to metastasize to regional lymph nodes characterize the biologic behavior. The variants locally advanced and metastatic require wide excision and node dissection. Such procedures can be extremely detrimental for patients. The limit of the surgery can be safely pushed forward with a multidisciplinary approach. The concept of skin oncoplastic surgery, the ablative procedures and the reconstructive options (skin graft, pedicled flap, microsurgical free flap) are discussed together with a literature review.

Interstitial HDR Brachytherapy in the Treatment of Non-Melanocytic Skin Cancers around the Eye

BACKGROUND

Eyelid tumors are rare skin cancers, the most common of which is basal cell carcinoma characterized primarily by local growth. In addition to surgery, radiotherapy is among the basic methods of treatment. External beam radiotherapy is associated with the risk of complications within ocular structures, especially the lens. In the case of interstitial brachytherapy, it is possible to administer a high dose to the clinical target volume (CTV), while reducing it in the most sensitive structures.

METHODS

This paper presents the results of an analysis of 28 patients treated with interstitial high dose rate (HDR) brachytherapy for skin cancers of the upper and lower eyelid; medial and lateral canthus; and the cheek, nose and temples with the infiltration of ocular structures. The patients were treated according to two irradiation schedules: 49 Gy in 14 fractions of 3.5 Gy twice a day for 7 days of treatment, and 45 Gy in 5 Gy fractions twice a day for 5 days. The mean follow-up was 22 months (3-49 months).

RESULTS

two patients (6%) had a relapse: a local recurrence within the irradiated area in one of them, and metastases to lymph nodes in the other. The most common early complication was conjunctivitis (74%), and the most common late complication was dry eye syndrome (59%).

CONCLUSIONS

Interstitial HDR brachytherapy for skin cancers of the upper and lower eyelid; medial and lateral cants; and the cheek, nose and temples with infiltration of ocular structures is a highly effective, short and relatively low burden type of treatment.

Basal cell carcinomas of the eyelid: Results of an initial surgical management

PURPOSE

Our objective was to assess the results of surgical management of palpebral basal cell carcinomas (BCC) followed by a second line treatment discussed during a Multidisciplinary Team Meeting (MTM).

MATERIALS AND METHODS

This retrospective single-centred study includes all surgically-treated basal cell carcinomas of the eyelids between January 2005 and January 2015. After initial surgery, the cases were systematically discussed during a multidisciplinary team meeting in order to assess the need for additional treatment. Data relative to the patient, tumor and management were pulled from the medical record.

RESULTS

A total of 171 patients were included, with a mean age of 74 years. Among the patients, 151 underwent pentagonal resection of the tumor, and 20 patients had a superficial excision. After surgical management, 120 patients (70.2%) were considered to have sufficient free margins. The other 51 patients (29.8%) had insufficient margins due to remaining tumor cells (38 patients) or free margins less than 1mm. Among these 51 patients with insufficient margins, 19 received a second surgical treatment, 17 patients received adjuvant radiotherapy, and 15 were followed closely with an intensive biannual follow-up program. No patients were lost to follow-up. With a mean follow-up of 42 months (min. 6 months-max. 128 months), 7 out of 171 patients (4.1%) developed a local recurrence. The mean time between surgical management and recurrence was 24 months. The recurrence rate was higher for the group of patients with a recurrent tumor (11.6%) than for the group of patients referred for initial management (2.8%). Incomplete resection was also associated with a higher recurrence rate (3 recurrences out of 51 patients).

DISCUSSION

The management of basal cell carcinomas of the eyelid is first and foremost surgical with the goal of complete resection confirmed by histopathological analysis. The histological analyses (Mohs micrographic surgery, frozen section technic, paraffin fixation) and recommended sizes of the margins can vary in the literature, with recurrence rates from 1.8% to 9.5%.

CONCLUSION

In our experience, multidisciplinary management of BCC of the eyelid, including initial macroscopic surgery, histopathological analysis stating the histological type and size of the margins, along with additional treatment discussed in a MTM, allows for a recurrence rate of 4.1%.

Malignant hair follicle tumors of the periorbital region: A review of literature and suggestion of a management guideline

Malignant hair follicle tumors are rare skin adnexal malignancies that have a predilection for the head and neck region. They can be categorized into a number of different subtypes. Histologically, they are distinct from their benign counterpart. To the best of our knowledge, there is no extensive review of these malignancies, especially in the periorbital region. We aim to provide a literature review and a guideline for management of these malignant tumors in the periorbital region. Database from Medline, PubMed, Embase, and Google Scholar were consulted. A total of 16 cases from the literature on hair follicle malignancies in the periorbital region were included in this review. The clinical presentations, diagnostic patterns, investigations used, and best management approach of these tumors are discussed. The American Joint Committee on Cancer (AJCC) 7(th) edition carcinoma of the eyelid staging system was used to describe their behaviors. We recommend wide excision surgery and a close follow-up for these tumors. Tumors presenting with a late stage require work-up for distant metastasis and consideration for exenteration procedures. The role of radiotherapy and chemotherapy in this context is still uncertain.

The importance of margins in head and neck cancer

An estimated 200,000 deaths each year worldwide are due to cancer of the head and neck, mostly mucosal squamous cell carcinoma and nonmelanoma skin cancer. The status of surgical margins is important for prognosis and need for adjuvant therapy. We will discuss how margin status impacts outcomes and therapy, and the conundrum of determining margin status.

Evaluation of frozen section margins in high-risk cutaneous squamous cell carcinomas of the head and neck

OBJECTIVES/HYPOTHESIS

To identify histopathologic features associated with poor correlation of frozen and permanent pathology margins following wide local excision for advanced cutaneous squamous cell carcinomas of the head and neck.

STUDY DESIGN

Retrospective review.

METHODS

A retrospective review of patients undergoing excision of advanced head and neck squamous cell carcinomas between the years 2010 AND 2013 was performed. Demographic, operative, and pathology data were collected. Overall correlation between frozen section margins and final margins on permanent section results was calculated. Positive and negative predictive values of several histopathologic features were determined.

RESULTS

Forty-one cases were identified from the database. Perineural invasion, lymphovascular invasion, and a component of poorly differentiated carcinoma were identified in 61.3%, 34.5%, and 17.1% of cases, respectively. Discrepancy between frozen section margins and permanent margins was identified in eight cases (19.5%). The false-negative rate for poorly differentiated carcinoma, lymphovascular invasion, and perineural invasion was 14%, 36%, 26%, respectively. The positive and negative predictive value of poorly differentiated carcinoma, lymphovascular invasion, and perineural invasion in predicting discrepancy between frozen and permanent margins was 14% and 80%, 36% and 84%, and 26% and 92%, respectively.

CONCLUSIONS

This study demonstrated a moderate rate of discrepancy between frozen and permanent section analysis of operative margins from high-risk cutaneous squamous cell carcinomas of the head and neck. The presence or absence of certain histopathologic features appears to be associated with a higher rate of frozen section discrepancy. Evaluation of these features in a preoperative biopsy or staging excision may be useful in planning definitive excision and reconstruction.