Breast tissue markers are common in current clinical practice and are susceptible to migration. Herein, we present the case of a 47-year-old woman with invasive breast carcinoma diagnosed through ultrasound-guided core biopsy, who underwent placement of a breast marker (HydroMARK ® ) under ultrasound guidance 30 days after core biopsy and with subsequent marker migration to the nipple. The correct position of the marker was documented by mammography after its placement and by magnetic resonance imaging (MRI) after neoadjuvant chemotherapy. Migration of the marker to the nipple was evident only by mammography on the day of surgery. We hypothesized that an intraductal path was the route of marker migration in this patient. Marked ductal ectasia evident on MRI and histopathologic examination supported this hypothesis. To the best of our knowledge, this is the first published case of intraductal migration of a breast tissue marker.

Breast tissue markers are common in current clinical practice and are susceptible to migration. Herein, we present the case of a 47-year-old woman with invasive breast carcinoma diagnosed through ultrasound-guided core biopsy, who underwent placement of a breast marker (HydroMARK ® ) under ultrasound guidance 30 days after core biopsy and with subsequent marker migration to the nipple. The correct position of the marker was documented by mammography after its placement and by magnetic resonance imaging (MRI) after neoadjuvant chemotherapy. Migration of the marker to the nipple was evident only by mammography on the day of surgery. We hypothesized that an intraductal path was the route of marker migration in this patient. Marked ductal ectasia evident on MRI and histopathologic examination supported this hypothesis. To the best of our knowledge, this is the first published case of intraductal migration of a breast tissue marker.

Purpose: This study aimed to evaluate changes of the alveolar bone and interdental bone septum of the mandibular incisors through cone-beam computed tomography (CBCT) after orthodontic treatment of mandibular dental crowding without dental extraction. Materials and Methods: The sample consisted of 64 CBCT images (32 pre-treatment and 32 post-treatment) from 32 adult patients with class I malocclusion and an average age of 23.0±3.9 years. The width and height of the alveolar bone and interdental septum, the distance between the cementoenamel junction (CEJ) and the facial and lingual bone crests, and the inclination of the mandibular incisors were measured. Results: The distance between the CEJ and the marginal bone crest on the facial side increased significantly (P<0.05). An increased distance between the CEJ and the bone crest on the facial and lingual sides showed a correlation with the irregularity index (P<0.05); however, no significant association was observed with increasing mandibular incisor inclination (P>0.05). The change in the distance between the CEJ and the marginal bone crest on the facial side was correlated significantly with bone septum height (P<0.05). Conclusion Bone dehiscence developed during the treatment of crowding without extraction only on the incisors' facial side. Increasing proclination of the mandibular incisor was not correlated with bone dehiscence. The degree of dental crowding assessed through the irregularity index was associated with the risk of developing bone dehiscence. The interdental septum reflected facial marginal bone loss in the mandibular incisors.

Acute ischemia of the rectum or anal canal resulting in necrosis is extremely uncommon because both the rectum and the anal canal have excellent blood supplies. We present a case with spontaneous necrosis of the anal canal without rectal involvement. Surgical debridement was accomplished, and the recovery was uneventful. The patient was elderly, with probable atherosclerotic arterial disease, and presented with hypotension. Due to the lack of other precipitating factors, the hypoperfusion hypothesis seems to be the most suitable in this case. To the best of our knowledge, no similar cases have been reported in the literature on this subject.
Aged ; Anal Canal* ; Debridement ; Equipment and Supplies ; Humans ; Hypotension ; Ischemia ; Necrosis* ; Precipitating Factors ; Rectum